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Sefaria

Sefaria is a that operates a free, open-source providing access to a comprehensive collection of Jewish texts, including the Tanakh, , , and classical commentaries, primarily in Hebrew with English translations and interconnections between sources. Founded in 2011 by and Brett Lockspeiser, it was incorporated as a nonprofit in 2013 with the mission to steward Jewish texts into the digital age, democratizing access and fostering interactive learning through tools like searchable databases, user-generated source sheets, and multilingual support. By 2024, the platform hosts over 318 million words of content and serves approximately 775,000 monthly active users worldwide, enabling collaborative study and contributing to projects such as the release of the William Davidson edition in 2017 and integrations with AI for text analysis in 2023. Sefaria's open architecture has revolutionized Jewish textual scholarship by facilitating global participation, with users creating over 200,000 customizable source sheets by 2019 and marking its 10-year anniversary in 2023 with initiatives like the "Global Community ."

Overview

Etymology

The name Sefaria is a derived from Hebrew roots associated with books and libraries, functioning as a play on sifria (סִפְרִיָּה), the Hebrew term for "," which itself stems from sefer (סֵפֶר), meaning "" or "." This etymological construction evokes the project's core purpose as a digital repository of Jewish texts, blending the singular artifact of a book with the collective expanse of a library.

Mission and Organizational Goals

Sefaria operates as a nonprofit organization with a core mission to leverage technology in constructing the future of Jewish learning through an open and participatory framework. This entails developing a free, digitally accessible library encompassing Jewish texts, translations, and commentaries to foster widespread engagement with Torah and related sources. The initiative emphasizes universality, ensuring that these resources remain unencumbered by proprietary restrictions, thereby enabling communal contributions and reuse. Organizational goals center on revolutionizing Jewish and textual interaction by expanding the platform's content , which includes classical works like the Tanakh and alongside modern interpretations. Sefaria prioritizes innovative technological integration, such as interlinked texts and advanced search functionalities, to make ancient materials dynamically relevant in contemporary contexts. Strategic objectives include attracting a broader user base, enhancing text interconnections, and promoting educational partnerships with Jewish institutions to support teaching and study. Further aims involve positioning Sefaria as a in applying , including , to Jewish textual analysis while maintaining ethical oversight. As a donation-supported entity, it seeks sustainable growth to sustain free access without commercialization, ultimately envisioning as a living, globally engaged tradition rather than static archival material. These goals reflect a to collective Jewish inheritance, where texts are viewed as communal assets open to all for study and innovation.

History

Founding and Early Development (2011–2014)

Sefaria originated from the vision of , a best-selling author, and Brett Lockspeiser, a former product manager, who developed its initial concept in 2011 to create a digital platform for accessing and interconnecting Jewish texts. The project aimed to address the fragmentation of Jewish sacred literature by building an open-source library with linked references, drawing on Foer and Lockspeiser's prior collaboration since meeting on a youth fellowship trip to in 1999. In 2012, the co-founders quietly released a beta version of the site, marking the platform's early technical inception without widespread publicity. By 2013, Sefaria advanced through organizational formalization and initial growth: tech investor Mo Koyfman joined as a co-founder and helped form the alongside Foer and Lockspeiser. The nonprofit incorporated that year, securing seed funding from the Natan Fund, philanthropists Jonathan and Tamar Koschitzky, and the Jim Joseph Foundation to support development. It hired its first employee, who remains with the organization, and expanded its digital library to encompass 8.5 million words of texts, establishing a foundation for broader accessibility. In 2014, Sefaria introduced innovative features during its early operational phase, including a pioneering data visualization tool developed by its engineers to illustrate interconnections between the Tanakh and , enhancing users' ability to explore textual relationships. The platform's Source Sheet Builder enabled community engagement, resulting in users generating 6,000 customizable study sheets that compiled and linked texts. Additionally, Sefaria launched its Partnership Initiative, partnering with four schools to integrate the library into educational curricula and promote its use in formal Jewish learning environments.

Expansion and Key Milestones (2015–2022)

In 2015, Sefaria secured its first partnership with a major Jewish publisher, Urim Publications, to digitize and release English translations of the Tanakh and select commentaries into the , marking a significant step in expanding accessible content. By that year, the library had grown to approximately 50 million words, and twelve third-party applications had been developed using Sefaria's and database, demonstrating early ecosystem integration. The following year, 2016, saw the release of a complete bilingual edition of Rashi's commentary and the launch of dedicated mobile applications for and , enhancing user accessibility beyond web browsers. User engagement accelerated, with the platform reaching 50,000 unique visitors in a 30-day period. By 2017, Sefaria introduced the William Davidson , featuring Adin Steinsaltz's English translations, which broadened access to this foundational text. The organization also launched a Hebrew-focused site, sefaria.org.il, to serve and Hebrew-speaking users, while doubling its visitor milestone to unique users per 30 days. In , Sefaria recorded over 1 million users in a single year from nearly every country, reflecting global adoption. The library expanded to 183 million words (143 million in Hebrew and 40 million in English), and pilot programs were initiated with Israel's Ministry of Education to integrate the platform into curricula. Content diversification continued in with the addition of Nechama Leibowitz's sourcesheet collection, alongside users generating 200,000 source sheets, underscoring community-driven expansion. Co-founder Brett Lockspeiser's recognition on the highlighted the project's influence. The 2020 rollout of topical search functionality and COVID-19-themed resources supported during the , coinciding with a surge to 500,000 monthly users. A major site redesign in 2021 introduced explanatory texts and incorporated works by female scholars, such as Dr. Judith Hauptman's Talmudic commentaries, promoting diverse perspectives. Key English translations added included those of Ramban and the , the latter digitized in a comprehensive bilingual edition released late that year. In 2022, Sefaria added English translations of Midrash Rabbah and Rambam's , along with the Brown-Driver-Briggs Hebrew-English Lexicon to its reference section, enhancing analytical tools. Multilingual expansions included French translations of the and German versions of the Babylonian Talmud. User base exceeded 600,000 monthly, with $1 million raised from small donations, signaling sustained support.

Recent Developments (2023–2025)

In 2023, Sefaria marked its tenth anniversary, having amassed a of approximately 318 million words across Jewish texts, which facilitated broader of amid rising interest in digital Jewish learning. The organization released a commissioned English translation of Bereshit Rabbah, enhancing accessibility to this foundational midrashic text for non-Hebrew readers worldwide. Engineers added () to select texts, improving aids for learners at varying Hebrew proficiency levels. Sefaria also unveiled a strategic plan for 2023–2027, emphasizing ambitious growth in content, user engagement, and technological infrastructure to amplify long-term impact on Jewish textual study. Throughout 2023 and 2024, Sefaria incorporated dozens of new kabbalistic texts into its library, expanding resources on mystical Jewish traditions from medieval and later sources. In 2024, the platform advanced integration as planned, deploying tools to generate topic-page content, including curated source selections, headings, introductions, and interactive guides such as one for . Complementary open-source projects, like the Havruta for query analysis and response generation from the text corpus, further supported AI-driven study applications. New publications added included The Torah: A Women's Commentary and Learning to Read by Simi Peters, alongside ongoing commissions for original scholarship. The Giving Circles program launched to cultivate recurring donor support for operational sustainability. Additional features encompassed a Day of Jewish Learning initiative allowing users to submit personalized letters honoring deceased relatives, integrated into study sheets. Investor Daniel Loeb initiated the Challenge via his foundation, promoting festive engagement on the platform. Text expansions featured works like the Meiri's commentary on from manuscript editions and Em LaMikra: Vayiqra in Context. In 2025, Sefaria introduced an enhanced Topics landing page in March, enabling users to navigate the library thematically rather than by book titles alone, with AI-assisted curation to streamline discovery. An English translation of Rabbi Avraham Yitzchak Kook's Shemonah Kevatzim was added, broadening access to modern Orthodox philosophical writings. In January, Sefaria co-hosted a panel with the Rabbi Sacks Legacy on "The Future of Books," discussing digital preservation and innovation in Jewish textual dissemination at Thrive Capital in New York City.

Content Library

Core Texts and Structure

Sefaria's core texts consist of classical Jewish works in their original Hebrew and Aramaic, forming the primary content of the library and excluding user-generated materials or modern supplements. These include the Tanakh (Hebrew Bible), the Mishnah, the Babylonian and Jerusalem Talmuds, Midrashim, and select medieval compositions such as Maimonides' Mishneh Torah. The platform prioritizes accurate digitization of these foundational sources, with texts segmented into atomic units corresponding to traditional divisions like verses, mishnayot, or sugyot (Talmudic discussions), enabling precise navigation and interlinking. The library organizes texts into 14 high-level categories, such as , , Halakhah, , and , with subcategories for finer classification; for example, subdivides into (five books: through Deuteronomy), (eight prophetic books), and (eleven writings). The comprises six sedarim (orders) encompassing 63 tractates, while the Babylonian covers 37 tractates with commentary on the , structured by (double-sided folios) subdivided into numbered lines. This categorization facilitates topical access, though core texts remain anchored in their sequential, canonical forms rather than thematic rearrangements. Structurally, each text is governed by an that defines hierarchical levels—typically progressing from the book title through chapters, sections, and segments—ensuring consistency across the corpus. For biblical texts, the schema mirrors verse-level granularity (e.g., "Genesis.1.1"), whereas rabbinic texts incorporate structures for text and commentary, such as followed by . This model supports uniform referencing via "Ref" strings, allowing bidirectional links between citing and cited passages, as in Talmudic citations of Tanakh verses. Original texts are presented with (vowel points) where traditional, and the schema accommodates variations like alternative in Talmud editions. By 2018, the Hebrew/Aramaic core had reached approximately 143 million words, underscoring the scale of efforts focused on fidelity to primary manuscripts and standard prints.

Translations and Commentaries

Sefaria offers translations of its core Jewish texts into multiple languages, with English being the most comprehensive, followed by , , , , and , among over a dozen languages represented in the library. Users can select preferred s via the platform's settings or resource panel, enabling comparisons that highlight interpretive differences, as each inherently reflects the translator's understanding of the source material. Notable English translations include the William Davidson , completed to support study, and the JPS Tanakh, alongside modern works like Adin Steinsaltz's Tanakh and commentary. The platform has commissioned projects such as the first full English of Rabbah in 2022 and incorporated The : A Women’s Commentary in 2024. Commentaries on Sefaria encompass classical rabbinic works, such as Rashi's bilingual Torah commentary digitized in 2016, alongside medieval interpretations by Ibn Ezra, , and Rashbam, which are interlinked to their base texts for contextual study. Modern commentaries include Adin Steinsaltz's complete oeuvre added in 2023, Nechama Leibowitz's essays compiled as source sheets in 2019—the first major female commentator featured—and contributions from scholars like Judith Hauptman in 2021. Halakhic commentaries, such as Be'er Mayim Chaim and Sefer Hamitzvot of Rasag, are available under dedicated categories, treated equivalently to primary texts in the database structure to facilitate layered analysis. The library emphasizes open contributions, with partnerships like Urim Publications enabling additions of interpretive works, ensuring growth through verifiable, licensed content.

Supplementary and User-Generated Materials

Sefaria's source sheets represent a form of , enabling registered users to compile selections from the platform's library alongside personal annotations, external texts, and such as images or videos. These digital documents serve as flexible tools for organizing study materials, facilitating customized explorations of Jewish texts for individual learners, educators, or group discussions. Users construct sheets by referencing texts via title and chapter, editing excerpts for brevity, and incorporating commentary to highlight connections or interpretations, thereby extending the library's resources with insights. The feature supports public sharing, integrating user-created sheets into Sefaria's searchable collection, which exceeds 200,000 entries as of recent platform data. This repository allows browsing by topic, keyword filtering, or metrics like views and recency, fostering community-driven discovery and reuse of supplementary compilations. In 2019 alone, users generated approximately 6,000 new sheets, reflecting sustained engagement with the tool for pedagogical and scholarly purposes. Sheets can be exported to formats compatible with for further editing or printed distribution, enhancing their utility beyond the digital interface. Beyond individual sheets, users organize them into collections, with over 370 such groupings documented in organizational reports, often curated by educators or institutions to thematic ends. These elements augment Sefaria's structured library by introducing interpretive layers and contemporary applications, though they remain distinct from curated core texts to maintain textual fidelity. While contributions to primary texts occur through vetted submissions, source sheets emphasize open, non-authoritative user expression without altering foundational content.

Platform Features

Navigation and Interlinking

Sefaria's navigation relies on a structured reference system, known as "refs," which divides texts into precise, addressable sections such as specific verses, chapters, or folios (e.g., " 1:1" or "Berakhot 2a:1"). This granularity enables seamless interlinking, where citations within texts automatically to their corresponding sources, reflecting traditional Jewish textual interconnections like Talmudic references to biblical verses. Users can on any hyperlinked citation or passage to access the linked content directly, often via popups or panel expansions that display the Hebrew original alongside translations. Central to interlinking is the Resource Panel, accessible by selecting a text passage on the web interface or via the bottom panel on mobile apps. This panel categorizes connections under subheadings like "Related Texts," listing commentaries, quoted sources, and cross-references by corpus (e.g., , , ), allowing users to navigate laterally to associated materials without leaving the primary text. For instance, examining a verse reveals linked rabbinic discussions, with options to filter by type (e.g., commentary or reference) and expand into full views. Navigation extends beyond links through library browsing, where users access the text catalog via the "Texts" header, viewable hierarchically by category or description, and employ full-text or topical search introduced in 2020 for discovery. Within texts, the panel's facilitates intra-text movement, such as jumping to parshiyot in or daf in , while tools like "Compare Text" enable side-by-side views of versions or translations. These features, supported by API endpoints for programmatic refs and links, underscore Sefaria's design for fluid exploration of textual dependencies.

Study Tools and Customization

Sefaria equips users with integrated study tools to enhance textual analysis and personal learning. Note-taking allows attachment of private annotations to specific passages; users access this by clicking the notes icon to open a panel, enter text, and save. Highlighting supports markup through custom tags and color assignments on text segments, enabling segmentation and filtering for thematic breakdown. The platform's full-text search function permits keyword queries across the library, while bookmarking facilitates quick revisits to favored sections. Dictionaries and inline definitions provide immediate lexical support for unfamiliar terms. A core study feature is the source sheet editor, which enables creation of customized compilations integrating library texts, multimedia embeds, and user-generated content into shareable, digital documents. These sheets support collaborative organization via collections, where users group them by theme or curriculum, editable through profile settings for addition, modification, or deletion. Clicking any passage opens the resource panel, revealing interlinked commentaries, quoted sources, and related sheets to contextualize study. For logged-in users, progress tracking logs metrics such as texts read and sheets produced, fostering accountability in learning routines. Customization centers on the A/א menu at the screen's top right, offering granular control over text display to suit individual preferences. Options include viewing original language alone, alone, or both concurrently; layout choices span monolingual formats (continuous paragraphs or verse-by-verse) and bilingual arrangements (stacked or side-by-side with original on left or right). Font size adjusts dynamically via increment/decrement controls, while text-specific toggles manage vowels in Hebrew (added progressively for per ), punctuation in , cantillation marks in Tanakh, and aliyot divisions in . Users set default translations library-wide through account preferences, with per-text overrides available in the resource panel for flexibility. These features ensure adaptability without altering core content, accommodating diverse study styles from novice to advanced.

Accessibility and User Interface

Sefaria's employs a clean, responsive design that prioritizes ease of navigation across its of Jewish texts, featuring interconnected between primary sources, commentaries, and translations. The supports bilingual displays alongside monolingual options in Hebrew or English, with customizable Hebrew text rendering that includes or excludes (vowel points) and ta'amim (cantillation marks) to suit varying levels of reader expertise. Users can adjust font sizes dynamically and enable dark mode for reduced during extended study sessions. Accessibility features are integrated to broaden access, with the interface compatible with major screen readers, including testing conducted with JAWS on Internet Explorer, though general device-level screen reader activation suffices for navigation. Sefaria explicitly commits to inclusivity for visually impaired users, viewing accessibility as essential to democratizing Jewish textual heritage beyond sighted individuals. The mobile application extends these capabilities, allowing interface language selection and seamless access to linked texts, maintaining consistency with the web version's intuitive layout praised in user feedback for its aesthetic appeal and search functionality. Recent interface updates, including a redesigned layout introduced around 2021, aim to enhance user engagement by streamlining content discovery and personalization options. While generally lauded for user-friendliness, some advanced users have critiqued organizational aspects for potentially favoring beginners over those familiar with traditional Tanach structures. Overall, the platform's emphasis on open, participatory design supports its goal of free textual access, with ongoing development reflected in job postings for UX/UI specialists as of 2025.

Technological Advancements

Mobile and Cross-Platform Support

Sefaria provides free mobile applications for and , allowing users to access its comprehensive library of Jewish texts, including , , , and commentaries, directly on smartphones and tablets. The apps, available via the and , replicate core web functionalities such as text navigation, interlinking, search, and translation switching between Hebrew and English. Automatic updates ensure users receive the latest content and improvements without manual intervention. Developed using , a JavaScript-based , the mobile apps maintain a unified codebase with minimal platform-specific native code, enabling consistent user experiences across and while reducing development overhead. This cross-platform approach supports seamless transitions between devices, with features like adjustable font sizes via two-finger zoom or interface icons, and access to connections between texts through taps or gestures. Offline support is a key feature, permitting full or selective downloads of the for use without , ideal for or areas with limited ; users must periodically update downloads manually through app settings to incorporate new texts or corrections. Account login integrates mobile sessions with the , syncing reading , saved notes, source sheets, and preferences across devices for uninterrupted study. While no native applications exist, the interface's compatibility with major browsers extends cross-platform reach to computers, with emulators like offering app on desktops for enhanced offline capabilities.

AI Integration and Innovations

Sefaria's integration of focuses on enhancing access to Jewish texts through tools that prioritize factual accuracy, user feedback, and ethical guidelines, with implementation accelerating from mid-2024 onward. The platform adheres to principles including —marking AI-generated content with a dedicated and explanatory pages—positioning as a supplementary learning aid rather than a substitute for scholarly guidance, and committing to ongoing evaluation and adherence to the Rome Call for AI Ethics. These efforts build on Sefaria's foundational of texts into machine-readable formats, enabling applications for search, exploration, and comprehension while bridging linguistic barriers in Hebrew and . Key user-facing innovations include AI-assisted curation of approximately 1,000 out of 5,000 Topic pages, where large language models generate summaries subject to human review for accuracy. The Learning Guide, launched in public beta, exemplifies this by employing models such as Google's and Anthropic's Claude Opus to produce interactive summaries of commentaries, generate study questions, and score content on a 1-10 reliability scale, with over 14,000 source introductions reviewed by the Sefaria team. Users can submit corrections via a dedicated form to refine outputs. In research and prototyping, Sefaria collaborates on projects like Virtual Havruta, a retrieval-augmented generation () system that queries its text repository to deliver cited, perspective-diverse responses on Judaic topics, mitigating hallucinations through grounded retrieval and emphasizing trustworthiness. This initiative, developed with TUM Venture Labs and appliedAI Initiative , integrates Sefaria's for contextual insights and reached prototype stage by October 2024. Additional advancements encompass prototypes for enhanced text retrieval, presented at the DLD Conference, and in-house for improving internal citation links. Sefaria's open datasets, hosted on for tasks like in rabbinic languages, further support both internal experiments and external models such as ChatGPT, Claude, and Google Gemini. Future explorations include an "Ask the Librarian" feature to query texts non-authoritatively, with citations to prevent misuse in halachic contexts.

Organizational Structure

Leadership and Governance

Sefaria was founded in 2011 by , a bestselling author, and Brett Lockspeiser, a former engineer, with the initial concept aimed at creating an open digital platform for Jewish texts. The organization was incorporated as a nonprofit in 2013, at which point tech investor Mo Koyfman joined as a co-founder and board member, helping to secure early funding and formalize the comprising the three co-founders. Daniel Septimus serves as Chief Executive Officer, overseeing operations for the distributed team spanning locations from to . The executive leadership includes Tali Herenstein as , Lev Israel as , Michael Kellman as , Annie Lumerman as , Netanel Schwartz as , and Sara Wolkenfeld as Chief Learning Officer, reflecting a structure focused on strategy, technology, product development, operations, and content curation. As a 501(c)(3) nonprofit, Sefaria's is directed by a chaired by Samuel Moed, with members including co-founders Brett Lockspeiser and , alongside Raanan Agus, Kenden Alfond, Gary Claar, Michael Englander, Zoe Fertik, Jonathan Koschitzky, Mo Koyfman, Rachel Kraus, Michael Radwin, and Deborah Shapira. This board provides oversight on strategic direction and fiscal responsibility, consistent with standard nonprofit practices for mission-driven organizations in the sector.

Funding Sources and Sustainability

Sefaria operates as a 501(c)(3) non-profit organization, relying primarily on philanthropic contributions rather than user fees or advertising to maintain its free-access model. Its funding encompasses grants from foundations, major individual donations, and a growing base of small contributions from users worldwide. In 2024, reached $8.6 million, with expenditures at $8.2 million, reflecting balanced operations amid . Foundation support has included significant grants, such as $1 million from the Jim Joseph Foundation in 2023 for general operating support and $819,550 from the in 2024. Key foundations in Sefaria's donor base include the William Davidson Foundation and Jim Joseph Foundation in the Founder's Circle; the Koschitzky Family and Fund as partners; and others such as the AVI CHAI Foundation, Crown Family, and Charles and Lynn Schusterman Family Philanthropies among innovators. Individual major donors have featured philanthropists like and Sally Gottesman, alongside families such as the Belsky, Claar, and Kushner families. Community-driven giving constitutes a substantial portion, with 11,630 donors in contributing over $1.2 million in gifts under $1,000, averaging $35 per , including 4,538 first-time contributors. To enhance sustainability, Sefaria has prioritized recurring through its Sustainers program, which grew to 2,107 monthly donors by , generating $386,422 annually. The launched Giving Circles in , tiered donor groups offering opportunities to foster long-term commitments and strategic . Earlier strategic goals included raising over $1 million yearly from small-dollar donors by 2021, supporting a community-funded model that reduces reliance on large grants. rates Sefaria 4/4 stars for financial health, citing strong efficiency, , and governance. This approach has enabled from $4 million in 2020 to the 2024 figure, with expenses allocated across (23%), product enhancements (24%), and (30%).

Reception and Impact

Achievements in Accessibility and Adoption

Sefaria has digitized and interlinked over 3,000 years of Jewish texts, encompassing approximately 183 million words by 2018, with ongoing expansions that enable free, searchable access without the barriers of physical volumes or institutional gatekeeping. This open-source platform facilitates precise textual navigation through features like hyperlinks between related passages, topical search introduced in 2020, and a source sheet builder that had generated over 200,000 user-created compilations by 2019, democratizing study tools traditionally limited to scholars. User adoption has surged, reflecting broad accessibility gains: from 50,000 unique monthly visitors in 2016 to 775,000 on average in , with peaks nearing 900,000 in of that year. By 2022, the platform had accumulated 5 million total users, with 598,000 monthly active users, 51% of whom were in (48% in the United States). Global reach extends to users in nearly every country by 2018, supported by mobile applications launched in 2016 and an adopted by 12 third-party apps as early as 2015. Partnerships have accelerated institutional adoption, including a 2014 initiative with day schools and 2018 pilots with Israel's Ministry of Education, integrating Sefaria into formal curricula. A 2023 survey of North American users aged 18-44 found that 80% reported increased motivation to study Jewish texts post-usage, attributing this to enhanced proficiency, confidence in text handling, and support for newcomers, thereby fostering wider engagement beyond elite study circles. Multilingual expansions, such as the 2022 addition of a French translation of the Jerusalem Talmud, further broaden adoption across diverse linguistic communities.

Criticisms and Controversies

In May 2023, Sefaria introduced a "gender-sensitive" adaptation of the Jewish Publication Society (JPS) Tanakh translation, which modified language to use gender-neutral terms in certain passages, such as rendering Hebrew terms for "warriors" or familial roles in a way that avoids presuming gender. This change prompted significant backlash from Jewish leaders, who argued it introduced ideological alterations incompatible with traditional interpretations, leading calls for a among ultra-Orthodox communities. Rabbis including those cited in Orthodox media outlets expressed concerns that such translations could mislead users, particularly students, by prioritizing contemporary social sensitivities over literal fidelity to the Hebrew text. Sefaria's defenders noted that the platform offers multiple translations side-by-side and does not endorse any single version, but critics from traditionalist perspectives maintained that the inclusion of non- options in a widely used risks normalizing liberal readings in educational settings. Broader criticisms focus on Sefaria's perceived lack of alignment with standards, given its founding by secular in 2011 and its inclusion of diverse commentaries ranging from traditional to modern non- sources. commentators have questioned the platform's "kosher" status for religious study, arguing that unfiltered access to potentially heterodox materials—such as or academic —undermines halakhic rigor, even if core texts like the remain unaltered. Forums and rabbinic statements from onward have urged yeshivas to restrict its use, citing risks of exposure to "treif" (non-kosher) content amid its popularity in institutions. Specific instances of translation inaccuracies have also drawn scrutiny. In May 2022, Lankry publicly criticized a passage in Sefaria's English rendering for containing erroneous or fabricated content that deviated from standard texts, shocking users and prompting rabbinic review. While Sefaria's general acknowledges that translations vary in quality and include both human and sourced works without claiming uniform perfection, detractors from conservative viewpoints argue these errors, combined with selective sourcing, reflect insufficient vetting for a tool positioned as authoritative for daily learning. Such concerns highlight tensions between Sefaria's open-library model and demands for ideological consistency in Jewish textual study.

Broader Cultural and Educational Effects

Sefaria has significantly expanded Jewish educational engagement by enabling self-directed study and formal curricula integration, with 598,000 average monthly users in 2022 accessing its library of over 3,300 texts totaling 318 million words. This growth, reaching 4.96 million unique visitors from 239 countries that year, has democratized , allowing newcomers and diverse learners—including women, individuals, and non-Orthodox —to participate in cycles like via user-friendly tools and translations. Educational partnerships, such as the Partnership Initiative launched in 2014, have incorporated Sefaria into classroom settings, fostering proficiency in text study among younger users, over 50% of whom are under 45. Culturally, Sefaria has broadened the Jewish textual canon by incorporating works from underrepresented voices, including female scholars like Nechama Leibowitz in 2019 and Judith Hauptman in 2021, alongside Sephardic and Kabbalistic sources previously less accessible in digital formats. , exceeding 430,000 source sheets by 2022, facilitates novel interconnections between ancient and modern texts, sparking interdisciplinary discussions that extend Jewish learning beyond traditional institutions. A 2023 survey of North American users (51% of the platform's base) found that engagement with Sefaria correlates with heightened , cultural connection, and confidence in communal participation, particularly among those aged 18-44, by supporting personal growth and teaching initiatives. These effects have rippled into public discourse, with Sefaria referenced in outlets like and , underscoring its role in shaping contemporary Jewish thought and practice. By prioritizing open-source translations—such as the public-domain William Davidson Talmud in 2017—and features like Learning Journeys for texts like Midrash Rabbah, the platform has sustained long-term habits of inquiry, empowering global users to contribute to and evolve Jewish interpretive traditions.

References

  1. [1]
    About Sefaria
    ### Summary of Sefaria
  2. [2]
    Sefaria Impact Report 2023 - Issuu
    Apr 1, 2024 · Sefaria's ongoing mission is to steward Jewish texts into the digital age and, in so doing, leverage technology to democratize access to our ...
  3. [3]
    10 years and 318 million words later, Sefaria brings Torah study into ...
    Oct 6, 2023 · Sefaria is marking the 10-year anniversary of its database with a “Global Community Torah” project. Users can help create a digital Torah letter ...
  4. [4]
    [PDF] Impact Report - Sefaria
    Among our most critical undertakings was researching AI as a tool to unlock access to and enhance the study of Jewish texts. Through dedicated research and.
  5. [5]
    A decade in, Jewish digital library has revolutionized learning for ...
    Aug 28, 2023 · Sefaria was founded in 2012 by author and entrepreneur Joshua Foer and Google alum Brett Lockspeiser. Back in 2011, Foer searched online for a ...Missing: impact | Show results with:impact
  6. [6]
    You Can Now Read The Whole Talmud Online - The Forward
    Feb 9, 2017 · Sefaria is a non profit that was started in 2011 by author, Joshua Foer ... (The name Sefaria is a play on the Hebrew word for library, sifria.).
  7. [7]
    'Sefaria' Text Site Could Expand Jewish Learning - New York Jewish ...
    Jun 19, 2013 · Spearheaded by 30-year-olds Brett Lockspeiser and Joshua Foer, Sefaria (the name is a play on the Hebrew word for library) is an idea that ...
  8. [8]
    Sefaria - GuideStar Profile
    Mission. Sefaria is a non-profit organization dedicated to using technology to build the future of Jewish learning in an open and participatory way.
  9. [9]
    SEFARIA INC | Benevity Causes
    MISSION—Sefaria will revolutionize Jewish learning and enhance Jewish literacy and engagement by building a free and universally accessible living library of ...
  10. [10]
    [PDF] Strategic Plan
    Their founding initiative, to build a free and accessible digital library of Jewish texts, was once regarded as an unlikely dream and is today a reality the ...
  11. [11]
    Sefaria Turns 10 Years Amid Launch of New Initiatives
    Oct 31, 2023 · “Sefaria's vision is to see Torah as alive in the world, and that only happens when Jews around the world are engaging with these texts ...
  12. [12]
    General FAQ - Sefaria
    Sefaria is a non-profit aiming to increase access to Jewish texts, using community and printed translations, and is supported by donations.
  13. [13]
    The Sefaria App Has the Whole Megillah (and More)
    Jan 10, 2021 · Sefaria co-founders Brett Lockspeiser and Joshua Foer first met in 1999, on a youth fellowship trip to Israel. Later, Lockspeiser became a ...
  14. [14]
    New online translation by Sefaria may be the Jerusalem Talmud's ...
    Sefaria has created a digital edition of the Jerusalem Talmud incorporating all 17 print volumes, section by section, appearing with ...
  15. [15]
    10 years and 318 million words later, Sefaria brings Torah study into ...
    the name ...
  16. [16]
    New Kabbalah Texts from 2023-2024 - Sefaria
    May 12, 2024 · Over the course of 2023-2024, we released dozens of new kabbalistic texts. Learn all about them in this blog.Missing: 2025 | Show results with:2025
  17. [17]
    AI on Sefaria
    Sefaria uses AI to generate content on topic pages, including source selections, headings, and introductions, and in a Pirkei Avot learning guide.Missing: integration 2024 2025
  18. [18]
    Sefaria to integrate AI into its text library by mid-2024
    Feb 5, 2024 · The high-tech Jewish text repository Sefaria hopes to integrated artificial intelligence into its system by the middle of this year.Missing: developments | Show results with:developments
  19. [19]
    Sefaria/AppliedAI - Virtual Havruta - GitHub
    Virtual Havruta integrates advanced retrieval-augmented generation models to analyze and respond to user queries. By delving into a vast repository of religious ...
  20. [20]
    Sefaria in the News: September-October 2024
    Investor Daniel Loeb Launches 'Simchat Torah Challenge' (eJewish Philanthropy, October 2024): eJP announces a Loeb Foundation initiative, created in ...Missing: 2023 2025
  21. [21]
    Updates - Sefaria
    See texts, translations and connections that have been recently added to Sefaria.Missing: 2015-2022 | Show results with:2015-2022
  22. [22]
    Top Tech Tips, New Projects, and More! (March 2025, Issue 4)
    Want to know who else is using Sefaria to build apps and projects powered by our data? We've got you covered with two new pages on the Sefaria Developer Portal.Missing: news 2023-2025
  23. [23]
    Sefaria and the Rabbi Sacks Legacy Examine the Future of Books
    News & Updates. Sefaria and the Rabbi Sacks Legacy Examine the Future of Books. 15 January 2025. sefaria event panel in action january 2025 ...Missing: 2023-2025 | Show results with:2023-2025
  24. [24]
    Sefaria: a Living Library of Jewish Texts Online
    The largest free library of Jewish texts available to read online in Hebrew and English including Torah, Tanakh, Talmud, Mishnah, Midrash, commentaries and ...Tanakh · Talmud · About Sefaria · Jewish Texts in English
  25. [25]
    Categories - Sefaria
    All texts at Sefaria are sorted into categories. When interacting with Sefaria.org, one immediately sees the fourteen highest level categories, and uses those ...Missing: core | Show results with:core
  26. [26]
    The Structure of a Book on Sefaria
    Each book on Sefaria is represented by an Index. Each book has one, and only one, Index associated with it. Each version of a text (a translation, a different ...Missing: core library
  27. [27]
    Index and Versions - Sefaria
    The document explains the structure and categorization of books in a library system through an Index, which includes metadata and schema, and describes how ...Missing: core | Show results with:core<|separator|>
  28. [28]
    Translations on Sefaria
    A large, growing collection of translations, with more than a dozen languages currently represented in the library.
  29. [29]
    Selecting a Language | Sefaria
    You can choose which language (English, Español, Français, Deutsch) you prefer, if available. Although we don't have translations in all four languages for ...
  30. [30]
    Learning Tip #5: Choose a Translation - Sefaria
    Every translation is a commentary. Translators' choices of words reflect their interpretations of the text. Sefaria offers multiple translations of many books ...
  31. [31]
    How to Choose a Default Translation Language - Sefaria Help Center
    Jul 11, 2025 · To choose a default language, go to profile, then settings, and select your preferred language under 'Preferred Translation Language'. English ...
  32. [32]
    https://www.sefaria.org/william-davidson-talmud
  33. [33]
    Tanakh - Sefaria
    Sefaria is an open source, nonprofit project. Support us by making a tax-deductible donation. donation icon Make a Donation. About.Torah · Genesis · Numbers · ExodusMissing: founder | Show results with:founder
  34. [34]
    Halakhah, Commentary - Sefaria
    Halakhah commentaries include works like Be'er Mayim Chaim, Bedek HaBayit, Brit Moshe, and Sefer Hamitzvot of Rasag, among others.
  35. [35]
    Commentaries - Sefaria
    In the Sefaria database, commentaries are treated the same as regular texts. This means that commentary texts have their own individual
  36. [36]
    Sheets on Sefaria
    Sheets let you mix and match sources from our library. Type in a source title and chapter to add it to your sheet, then edit the source to cut it down.Missing: feature | Show results with:feature
  37. [37]
    Getting Started With Sefaria
    Sefaria is a free, living library of Jewish texts, in Hebrew and in translation. The texts in our library are fully searchable, categorized by topic.Missing: core | Show results with:core
  38. [38]
    [PDF] Annual Report 2019 - Sefaria
    Sefaria partners with. Jewish schools, organizations, and thought leaders to develop innovative lesson plans, support educators and students, and explore the.
  39. [39]
    New Feature: Robust Editing and Printing for Source Sheets
    Aug 10, 2016 · Sefaria now offers the option to export source sheets to Google Docs. With this new feature, users can seamlessly export their source sheets to ...
  40. [40]
    [PDF] Impact Report 2022 - Sefaria
    Sefaria is quietly becoming one of the most powerful, revolutionary technologies in Jewish history. Its ever-expanding pool of resources is making Jewish texts ...Missing: mission | Show results with:mission
  41. [41]
    How a Melton School Ethics Course Uses Sefaria to Engage Adult ...
    Nov 3, 2022 · Beyond core Jewish texts like the Torah and Talmud, Sefaria is home to numerous lesser-known works, as well as extensive user-generated content ...
  42. [42]
    Guide to Contributing - Sefaria
    If you can spare 10 minutes, you can bring one piece of Jewish learning into the Public Domain. Some contributions ... Calendar API, a User-Requested feature, and ...
  43. [43]
    Text References - Sefaria
    A valid ref consists of a title string followed optionally by a sections string. A title string is any one of the known text titles or title variants.Missing: interlinking | Show results with:interlinking
  44. [44]
    Sefaria in Gephi: Seeing Links in Jewish Literature | Ludic Analytics
    Jun 17, 2014 · What Sefaria does (along with any number of other intriguing things that are not the topic of this post) is turns print links into hyperlinks ...
  45. [45]
    Linker Plugin | Sefaria
    The Sefaria Linker is a free JavaScript plugin for websites that include citations to Torah texts. You copy a few lines of code to your site and Sefaria will ...Missing: system | Show results with:system
  46. [46]
    Quick Guide: Meet the Resource Panel - Sefaria Help Center
    Jul 11, 2025 · The Resource Panel gives you access to a wide variety of texts and tools that were designed to enhance your experience on Sefaria.Missing: core structure
  47. [47]
    How to Find Interconnected Texts - Sefaria Help Center
    Aug 11, 2025 · To find connections on the Sefaria database: Click on any passage to open the Resource Panel. Scroll down to find the RELATED TEXTS subheading.
  48. [48]
    Links - Sefaria
    Returns a list of known connections for the submitted text ref along with some additional metadata. Log in to see full request history.Missing: system | Show results with:system
  49. [49]
    Navigating Sefaria's New Design
    We've created a new design of the Sefaria site to help you find new ways to engage with the library and deepen your Jewish learning.Missing: 2024 2025
  50. [50]
    Getting Started With The Sefaria API
    The Sefaria API allows live access to Sefaria's structured database of Jewish texts and their interconnections. It is designed to make getting a new web or ...Missing: system | Show results with:system
  51. [51]
    How to Write, Edit, or Delete Notes on a Text - Sefaria Help Center
    Aug 11, 2025 · Click on Notes to open a panel with an empty text box. Type your note into the provided text box. Click on Add Note to save your note.
  52. [52]
    Highlighter | Sefaria
    Create tags, assign highlight colors, and mark up sections of texts. Students can experiment with breaking down a text. Filtering and segmenting the tags ...
  53. [53]
    Study and Reference Tools - Sefaria Help Center
    Study and Reference Tools. Learn how to find definitions, take notes, bookmark a text, and more. An Overview of Reference Tools on Sefaria.Missing: platform customization
  54. [54]
    Sefaria Help Center
    Learn how to search for texts by book, verse, or topic. Sheets and Google Docs. Learn how to create compilations of sources and other media.Missing: generated | Show results with:generated
  55. [55]
    Making a Source Sheet on the Updated Editor | Sefaria
    Making source sheets on Sefaria is easy and allows creators to draw together a wide variety of sources, across media, and create a shareable digital document.
  56. [56]
    How to Use Source Sheet Collections - Sefaria Help Center
    Jul 29, 2025 · The Sefaria sheet editor is a tool that allows users to create their own compilations of texts and media. Source sheets may include texts...Missing: supplementary | Show results with:supplementary
  57. [57]
    Sefaria 101 - Going Deeper Into the Text - YouTube
    Nov 15, 2022 · Learn how to access materials that are connected to a text in Sefaria. Commentaries, quoted sources, sheets, web pages, and more help you to ...Missing: core library contents structure
  58. [58]
    In case you missed it... Tech Updates – 2022 - Sefaria
    Here is a roundup of some tech and product updates we have made at the end of 2021 and into 2022. Click on an item below or scroll down to see some exciting ...Missing: key 2015-2022
  59. [59]
    Quick Guide: Meet the A/א menu
    ### Customization Options in the A/א Menu
  60. [60]
    How to Change Your Preferred Translation - Sefaria Help Center
    Aug 11, 2025 · To update your default translation settings: Click on the profile button, found in the top right corner of your screen, to open a dropdown menu.
  61. [61]
    Sefaria 101 - Customize Your View - YouTube
    Nov 15, 2022 · Learn how to customize the text that you are viewing on Sefaria and how to switch translations.Missing: platform tools
  62. [62]
    Text Formatting and Accessibility - Sefaria Help Center
    Text Formatting and Accessibility. Learn how to change your font size, view a text with vowels or cantillation markings, and more.Missing: features | Show results with:features
  63. [63]
    Using the Sefaria Library
    plus much more!
  64. [64]
    Accessibility Features | Sefaria
    Need a larger font size? Learn how to adjust your font size, enable dark mode, and use screen readers on Sefaria.Missing: interface | Show results with:interface
  65. [65]
    How to Use a Screen Reader - Sefaria Help Center
    Feb 20, 2025 · As long as you have enabled your screen reader to operate on your device, it should work with Sefaria's interface. That being said, our site is ...Missing: features | Show results with:features
  66. [66]
    Sefaria for the Visually Impaired
    Accessibility is essential to Sefaria's work. We want to make the textual heritage of the Jewish people available to all users, not just sighted ones.Missing: features interface
  67. [67]
    Features and Settings on Sefaria's Mobile App
    Features and Settings on Sefaria's Mobile App ... Learn how to choose the language of your app interface, how to access interconnected texts on the go, and more.Missing: generated | Show results with:generated
  68. [68]
    Sefaria: Jewish Texts Library on the App Store - Apple
    Rating 4.5 (707) · Free · iOSSefaria is an unparalleled resource for anyone passionate about Torah, Jewish texts, and deepening their understanding of Judaism. The app is a masterful blend ...
  69. [69]
    Sefaria Library for G Suite Reviews & Product Details - G2
    I dislike Sefaria greatly. As my review title says: If you know your Tanach, don't use Sefaria. The site is not organized well for someone who is expected there ...
  70. [70]
    Sefaria is looking for a Senior Data Analyst in Israel! We are also ...
    Oct 6, 2025 · Sefaria is a growing organization with some exciting roles to fill! We're pleased to let you know about a new position in Israel for a UX/UI ...
  71. [71]
    Sefaria App
    Torah, Talmud, Mishnah, Kabbalah, Siddur and more.
  72. [72]
    Quick Guide: Meet the Sefaria Mobile App
    Jun 12, 2025 · Enjoy Sefaria's entire library and all of its links and interconnections on the go with Sefaria's free apps, available for both Android and iOS.Missing: cross- | Show results with:cross-
  73. [73]
    https://play.google.com/store/apps/details?id=org.sefaria.sefaria
  74. [74]
    Sefaria/Sefaria-Mobile: Sefaria for iOS and Android - GitHub
    This repo contains the source code and export script to generate the content for Sefaria's iOS App AND Sefaria's Android App.Sefaria-Mobile · Getting Started · Local DevelopmentMissing: cross- | Show results with:cross-<|separator|>
  75. [75]
    How Does Sefaria Use AI?
    Jun 10, 2025 · ... innovative methods for accessing, searching, exploring, and comprehending Jewish texts. The visionary approach of our founders in digitizing ...Missing: integration features
  76. [76]
    The Sefaria Team
    Sefaria's team is working to create the Jewish future.
  77. [77]
    Donate to Sefaria
    Sefaria accepts donations from donor-advised funds; our EIN is 46-4406454. If you need additional information to make a DAF donation, please contact Caitlyn ...Missing: contributions | Show results with:contributions
  78. [78]
    Sefaria's Supporters
    Partners שותפים. Koschitzky Family. Maimonides Fund. Innovators יזמים. Raanan and Nicole Agus. AVI CHAI Foundation. Aryeh B. and Elana Bourkoff. Aviv Foundation.Missing: 2015-2022 | Show results with:2015-2022
  79. [79]
    [PDF] Strategic Plan 2018 - 2021 - GuideStar
    If the first stage of Sefaria was about creating a great Torah library, the next stage is about bringing it to life. If the first stage was about capturing the.Missing: 2014 | Show results with:2014
  80. [80]
    Rating for Sefaria - Charity Navigator
    Rating 4/4 · Review by Charity NavigatorThis beacon provides an assessment of a charity's financial health (financial efficiency, sustainability, and trustworthiness) and its commitment to governance ...
  81. [81]
    [PDF] Sefaria 2020 Annual Report
    Co-founders Joshua Foer and Brett. Lockspeiser launch Sefaria. 2015. Sefaria makes its first deal with a major Jewish publisher (Urim) to digitize and release ...
  82. [82]
    Beyond A Jewish Library: Findings From A 2023 Survey of Users in ...
    Sep 21, 2023 · In 2022, Sefaria reached a total of five million users, with a monthly average of 598,000 users. Half (51%) of these users are in the United ...Missing: growth milestones 2015-2022
  83. [83]
    A Gender-Sensitive Adaptation of the JPS Translation” | Sefaria
    I designed the adaptation effort to meet Orlinsky's twin goals of accuracy and clarity in the portrayal of social gender. I began with a comprehensive and ...
  84. [84]
    Ultra-Orthodox Tensions: The Sefaria Controversy and the Struggle ...
    Jun 9, 2023 · Orthodox rabbis advocating a boycott of Sefaria, provoked by a newly introduced gender-sensitive translation of the Bible.
  85. [85]
    Sefaria and Koren - A Concerned Look - Cross-Currents
    May 24, 2023 · The tranformation he deals ... “In this way, Sefaria partners with Orthodox organizations that provide users with a more comfortable experience.
  86. [86]
    Is Sefaria Kosher? - Torah Musings
    Jun 12, 2023 · A minor controversy brewed recently when some people noticed that Sefaria provides readers a non-Orthodox Bible translation. This offers us an ...
  87. [87]
    BAN SEAFRIA. - The Yeshiva World
    May 31, 2022 · Sefaria is self-described as 'a Living Library of Jewish Texts Online', which use by many Rebbeim in many Moisdos across all our communities.
  88. [88]
    Rabbi Aaron Lankry Rips Sefaria App Over “Treif Content” [UPDATED]
    May 9, 2022 · A wrongly-translated portion of a Gemara in the Sefaria app has readers and Rabbonim shocked. The portion in question alleges to translate a Gemara, but brings ...