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Simple agreement for future equity

A simple agreement for future equity () is a financing instrument used by early-stage startups to raise capital from investors in exchange for the right to receive in a future priced financing round, without immediately issuing shares or creating obligations. Introduced by in late 2013 as an alternative to convertible notes, the SAFE simplifies seed-stage funding by eliminating interest rates, maturity dates, and repayment requirements that characterize traditional instruments. Unlike priced rounds, which require setting a valuation upfront, a SAFE defers valuation until a later financing event, typically converting into at a or valuation cap negotiated at the time of . The was initially released in a "pre-money" version in , designed for smaller, pre-priced rounds common among startups at that time. By 2018, as seed rounds grew larger and more complex, updated it to a "post-money" , which calculates based on the valuation after all SAFEs are invested but before the priced round, providing greater transparency on dilution for both founders and . Key features include its brevity—often a single four-page document—and flexibility, allowing startups to close investments quickly with individual without extensive legal negotiations beyond terms like the valuation cap or discount rate. Widely adopted, SAFEs have been used by nearly all Y Combinator-funded companies and by countless non-YC startups for seed financing, converting automatically upon triggers such as a qualified equity financing round, liquidity event, or dissolution. This instrument offers advantages in cost savings and speed, as it reduces legal fees compared to drafting convertible notes or conducting full equity rounds, while avoiding the complexities of debt covenants. Official templates are available from Y Combinator, including post-money variants with or without discounts, and adaptations for non-U.S. jurisdictions like Canada, the Cayman Islands, and Singapore. Despite its simplicity, users are advised to consult legal counsel to ensure compliance with applicable securities laws.

Introduction

Definition

A Simple Agreement for Future Equity (SAFE) is a contractual financing instrument whereby an investor provides capital to a in exchange for the right to receive at a future date, typically upon the occurrence of a specified triggering event such as a priced equity financing round, without the immediate issuance of shares. This agreement is designed as a streamlined, concise document, typically around five pages long, that facilitates early-stage by deferring the determination of the company's valuation and the investor's ownership percentage until a later . Unlike traditional debt instruments such as convertible notes, a SAFE explicitly does not constitute a and therefore lacks features like accrual, maturity dates, or mandatory repayment obligations, which eliminates the pressure of debt servicing on the startup during its formative stages. Instead, it functions as a non-dilutive mechanism until conversion, preserving the company's for growth initiatives. At its core, a SAFE operates as a warrant-like that grants the a prospective claim on the company's , commonly employed in seed-stage investments to the gap between initial funding needs and a formal valuation event. Conversion occurs automatically upon trigger events outlined in the agreement, ensuring the receives shares on terms reflective of the company's progress at that time.

Purpose and use cases

The primary purpose of a Simple Agreement for Future Equity (SAFE) is to allow early-stage startups to raise capital efficiently by deferring the of a current company valuation until a later financing round, when the business typically has greater traction and clearer metrics for assessment. This approach enables founders to secure funding without the complexities and time delays associated with traditional priced rounds, focusing instead on product development and growth. SAFEs are particularly ideal for pre-seed and seed-stage funding in technology startups, where uncertainty around valuation is high, and they are commonly used in angel investments and accelerator programs such as , which pioneered the instrument in 2013. Beyond the U.S., SAFEs have been adapted for use by non-U.S. entities, including in and the , with modifications to align with local securities laws and tax regulations, facilitating cross-border early-stage investments. From a strategic perspective, SAFEs streamline the by standardizing terms like the amount, thereby minimizing time and reducing associated legal costs compared to bespoke agreements. This simplicity helps align incentives between founders and investors, as it postpones debates over immediate equity dilution, allowing both parties to prioritize the startup's progress toward milestones that could enhance future valuations.

Key Components

Standard terms

The standard Simple Agreement for Future Equity (SAFE) template, developed by , includes several core, non-negotiable elements that form the boilerplate structure of the agreement. These terms are designed to be straightforward and uniform across most implementations, minimizing negotiation while ensuring the functions as a convertible security without immediate classification. The template emphasizes simplicity, with the investment treated as equity-like from inception, avoiding interest accrual or maturity dates typical of convertible notes. The investment amount, referred to as the "Purchase Amount" in the template, represents the principal sum provided by the investor to the company at the time of execution. It is typically classified as under Y Combinator's intent, though treatment under US GAAP may vary and often records it as a until conversion; consult an accountant. Unlike debt instruments, it does not accrue , and the full principal is eligible for conversion without repayment obligations if no conversion occurs. This structure simplifies for early-stage companies, treating the SAFE as deferred rather than a . Upon conversion, the entitles the to receive shares of in the same series as those issued in the equity financing that triggers the conversion, known as "Safe Preferred Stock." These shares carry identical rights, privileges, preferences, and restrictions as the standard issued to other s in that , ensuring parity without creating a separate class. This conversion mechanism aligns the SAFE holder with the broader group in the priced , typically a Series Seed or Series A, without diluting existing shareholders disproportionately beyond the agreed terms. Pro rata rights are included as an optional but commonly attached standard provision via a side letter, granting the the right—but not the —to participate in future financings to maintain their proportional percentage. Specifically, the may purchase additional shares equal to their as-converted stake in the new round, calculated as the ratio of their SAFE-converted shares to the company's fully diluted post-conversion. This provision helps protect early s from dilution in subsequent rounds and is often executed alongside the core SAFE to encourage participation without altering the base template. The governing law for the standard SAFE is typically the laws of the State of , particularly for U.S.-based startups incorporated there, as specified in the template's jurisdiction clause. This choice reflects Delaware's prevalence as the incorporation state for venture-backed companies due to its business-friendly corporate statutes and established . The includes standard representations and warranties from the company, affirming that it is duly organized, in , has full to enter the SAFE, and possesses all necessary rights to its without conflicting obligations. Investors provide limited representations, such as their status as accredited investors and acknowledgment that the SAFE is unregistered under securities laws, with mutual indemnification limited to breaches of these warranties. These boilerplate assurances facilitate execution while allocating minimal liability.

Optional provisions

Optional provisions in a Simple Agreement for Future Equity () allow parties to customize the instrument beyond the standard terms, providing flexibility to address specific negotiation needs in early-stage financing. These provisions are not mandatory but can be included to better align the interests of startups and investors, such as by offering additional protections or incentives for early funding. Y Combinator's SAFE templates support variations like these to facilitate tailored deals without altering the core structure, including variants with a valuation cap only, a discount only, both, or a Most Favored Nation (MFN) clause for uncapped SAFEs. In the post-money , a valuation cap sets a maximum at which the SAFE will convert into during a qualified financing round, ensuring that investors receive a larger if the company's actual valuation exceeds the cap. This provision protects early s from dilution in high-growth scenarios by capping the implied valuation used for conversion calculations. For instance, if a startup raises funds at a $6.7 million cap, an investor contributing $1 million would secure approximately 15% post-conversion. The cap is a key element, promoting in allocation. The provides SAFE holders with a reduction on the share paid by new investors in the next equity financing, rewarding early commitment with more favorable terms. Typically set at 20%, this rate—expressed as a discount (e.g., 20% off means paying 80% of the )—applies directly to the conversion , independent of the valuation cap if both are present. It incentivizes by lowering the effective cost per share, though the exact is negotiable based on deal specifics. A Most Favored Nation (MFN) clause grants SAFE investors the option to amend their agreement to match more advantageous terms offered in subsequent s issued by the same company, such as a lower valuation cap or higher . This provision activates as a one-time election, excluding non-economic side letters, and helps maintain among early backers if better deals emerge later. It is particularly useful in uncertain environments, allowing investors to adopt superior economic protections without renegotiating the entire , and is typically used in uncapped SAFEs. Side letter provisions consist of supplemental agreements that grant additional rights to specific investors, enabling deal-specific customizations without embedding them in the main SAFE document. Common examples include pro rata rights, which allow the investor to maintain their ownership percentage by participating in future equity financings on a pro rata basis—for instance, purchasing additional shares equivalent to their as-converted stake (e.g., 15% ownership enables investing $750,000 in a $5 million round). Other side letters may cover information rights, such as access to financial reports, or board observer status, providing non-economic benefits tailored to influential backers. These are optional and issued selectively to avoid applying universally to all SAFE holders.

Conversion Mechanics

Trigger events

The primary trigger event for conversion of a Simple Agreement for Future Equity (SAFE) is an equity financing round, in which the company issues at a specified . Upon the closing of such a round, the SAFE automatically converts into shares of the same series of issued to new investors, without any minimum raise amount required in the current post-money SAFE form. This conversion applies to the initial closing of the financing, ensuring SAFE holders receive on equivalent terms, subject to any valuation cap or provisions. A liquidity event, such as an acquisition or (IPO), also triggers conversion of the . In these scenarios, holders receive the same form of as preferred stockholders, which may include , shares in the acquiring company, or other assets, calculated on an as-converted basis or the greater of that amount or the original purchase amount. For instance, in an acquisition where is issued, s convert into that ; if the event results in a payout without issuance, holders may receive a direct distribution equivalent to their share. In the event of the company's or , the does not convert to but instead entitles the holder to repayment of their original purchase amount, ranking on par with preferred stockholders and junior to creditors. This repayment occurs only to the extent sufficient assets are available after satisfying senior obligations, with no of or additional returns. If none of these trigger events occur, the remains outstanding indefinitely, with no maturity date or obligation for repayment, allowing the agreement to persist until a qualifying event takes place. This structure avoids default repayment scenarios, keeping the instrument as a perpetual right to future equity.

Valuation mechanisms

The valuation mechanism in a Simple Agreement for Future Equity (SAFE) determines the price at which the investment converts into shares during a triggering equity financing round, typically using a valuation cap, a discount rate, or both to protect early investors from dilution at higher valuations. The conversion price is calculated as the lower of two values: (1) the SAFE price, derived from the post-money valuation cap divided by the company's capitalization (the total number of outstanding shares, including options and convertibles, but excluding the new round's shares), or (2) the discount price, which is the price per share in the triggering round multiplied by the discount rate (e.g., 80% for a 20% discount). Once the conversion price is established, the number of shares issued to the SAFE holder is computed by dividing the original investment amount by this conversion price. For instance, the formula is: \text{Number of shares} = \frac{\text{Purchase Amount}}{\text{Conversion Price}} This yields the exact stake, assuming conversion into of the same series as the triggering . SAFEs convert on a pre-money basis relative to the triggering equity financing, meaning the SAFE shares are added to the before the new round's is factored in, which directly impacts percentages by diluting pre-existing shareholders proportionally. This pre-money treatment ensures that SAFE holders receive their allocated shares without further adjustment for the new round's proceeds, simplifying cap table management while accurately reflecting the economic intent of the agreement. To illustrate, consider a $100,000 with a 20% (80% ) that converts during an round valued at $10 million pre-money with shares priced at $1 each. The price is $1 × 0.80 = $0.80 per share (assuming no lower valuation applies). The then receives $100,000 / $0.80 = 125,000 shares, representing 1.25% on the post-conversion pre-money cap table (before the new round's dilution).

Advantages and Disadvantages

Benefits for startups

Simple agreements for future equity (SAFEs) provide startups with a streamlined mechanism for raising capital, particularly in the early stages, by minimizing the complexities associated with traditional financing options. One primary advantage is the speed and simplicity of execution, as SAFEs consist of a single standard document with limited negotiable terms, typically only the valuation cap or , which significantly reduces legal fees and negotiation time compared to priced rounds. This allows founding teams to secure more rapidly and conduct rolling closings with multiple investors without waiting for a full round to materialize, enabling quicker access to capital for operational needs. SAFEs also alleviate immediate dilution and valuation pressures on startups by deferring the determination of company valuation and issuance until a future priced financing round, when the business has likely achieved greater growth and can command a higher valuation. This structure avoids forcing founders into potentially undervalued sales early on, preserving more ownership for the during the critical initial phase and aligning returns with the company's progress. From a financial perspective, SAFEs offer advantages by avoiding classification as (unlike notes), which eliminates interest expenses, repayment obligations, and the associated risks of that could limited resources. Without a maturity date, startups face no pressure to repay funds or extend terms, maintaining a cleaner financial position that supports easier future and compliance with standards, though they are typically accounted for as equity-like instruments pending conversion. Designed with founders in mind, SAFEs reduce the administrative burden in early-stage financing by providing a founder-friendly template that prioritizes operational focus over protracted legal processes, allowing teams to allocate time and resources toward product development and market expansion rather than deal structuring.

Disadvantages for startups

While beneficial for many early-stage scenarios, SAFEs may not suit all financing situations, lacking provisions for complex or edge-case needs, such as non-equity events without automatic conversion. If no qualified priced round occurs, startups avoid repayment but may face pressure or strained relationships, as SAFEs provide no maturity date or debt recourse. Additionally, post-money SAFEs, which predominated in % of issuances as of Q3 2024, offer clearer dilution upfront but can complicate negotiations in variable funding environments.

Risks for investors

Investors in Simple Agreements for Future Equity (SAFEs) face the risk of no guaranteed return on their , as these instruments lack provisions for accrual or a maturity date, potentially leaving capital invested indefinitely without any yield or repayment if no conversion event occurs. Unlike instruments such as convertible notes, SAFEs do not impose any obligation on the company to repay the principal, meaning investors have no recourse to recover funds in the absence of a successful liquidity event or financing round. This structure heightens the speculative nature of the investment, particularly in early-stage startups where failure rates are high. Dilution risks are particularly pronounced for SAFE holders when multiple SAFEs are issued, as conversions can stack during a subsequent priced round, eroding the ownership percentage that earlier investors anticipated. In pre-money SAFE structures, subsequent SAFE issuances further dilute prior investors by increasing the total outstanding SAFE obligations before calculating ownership shares upon conversion. Even in post-money variants, which offer some protection against dilution from additional SAFEs, broader equity issuances or down rounds can still significantly reduce an investor's , amplifying losses if the company's valuation declines. The timing of introduces substantial uncertainty, as SAFEs only convert into upon triggering such as a qualified equity financing or acquisition, which may be delayed, altered, or never materialize. This dependency on unpredictable future milestones can result in prolonged illiquidity, preventing investors from realizing any value or reallocating capital elsewhere. While features like a valuation cap can mitigate some dilution effects by setting an upper limit on the , they do not address the core timing risks inherent to the instrument. Tax and regulatory implications add further complexity for investors, with SAFEs potentially treated as for U.S. federal purposes due to their economic substance, though the absence of IRS guidance creates uncertainty around eligibility for benefits like the Section 1202 qualified small business exclusion. If classified as a stock right rather than , the holding period for gains treatment may reset upon conversion, potentially disqualifying investors from favorable long-term rates or exclusions. Internationally, enforceability varies by , as SAFEs—designed primarily under U.S. —may face challenges in recognition or compliance with local securities regulations, limiting protections for non-U.S. investors.

History and Development

Origins

The Simple Agreement for Future Equity (SAFE) was introduced in late 2013 by (YC), a prominent , as a streamlined alternative to convertible notes for early-stage funding in its accelerator programs. Developed specifically to address the complexities of seed investments, the instrument aimed to facilitate quicker and less burdensome financing rounds for emerging companies. The creation of the SAFE was led by Carolynn , a YC partner and attorney who had previously drafted the accelerator's Series AA financing documents in and convertible note templates in 2010. Working with other members of YC's legal team, sought to resolve key pain points in early funding, such as the debt-like attributes of convertible notes that introduced interest accrual, maturity dates, and repayment pressures, often complicating negotiations and future cap table management. By design, the SAFE eliminated these features, positioning it as a founder-friendly promise without the liabilities of traditional instruments. Upon its announcement on December 6, 2013, YC released the initial SAFE template publicly on its website, making it freely available to standardize seed-stage investments and encourage broad adoption beyond its own portfolio companies. This open-source approach reflected YC's goal of simplifying legal processes for startups, allowing investors to provide capital in exchange for future without the need for extensive customization or debt-related terms.

Evolution and updates

Following its initial launch in 2013, revised the template in 2018 by introducing the cap version, which calculates ownership percentages after accounting for all outstanding s and instruments. This update aimed to provide clearer predictions of dilution for both founders and investors, particularly in scenarios involving multiple issuances or "stacks," where pre-money caps could lead to unpredictable ownership outcomes. Early versions of the faced for in dilution under the pre-money , as the lack of explicit definitions for handling stacked investments could disadvantage investors by resulting in lower-than-expected upon . The 2018 revisions addressed these concerns by incorporating precise definitions and post-money , enhancing investor protection and simplifying cap table management without introducing or maturity dates. To support broader international adoption, adapted versions of the template have emerged for non-U.S. jurisdictions, including the and , with modifications to align with local securities regulations, tax implications, and requirements. These variations maintain the core simplicity of the instrument while ensuring compliance, such as adjustments for EU prospectus rules or UK financial promotion restrictions. As of the first quarter of 2025, SAFEs have achieved widespread in the U.S., accounting for 70% of seed rounds and 90% of pre-seed rounds tracked by Carta. Despite this dominance, the instrument has faced growing scrutiny in the context of elevated interest rates, as investors increasingly prefer interest-accruing alternatives like convertible notes to compensate for delayed equity conversion.

Comparisons with Other Instruments

Versus convertible notes

Convertible notes are classified as debt instruments, functioning as short-term loans that must be recorded as liabilities on a startup's , whereas Simple Agreements for Future Equity (SAFEs) are treated as rights with no classification or balance sheet impact. Convertible notes typically accrue simple interest at rates between 5% and 8% annually, which compounds the principal over time and increases the amount converted into upon a triggering . In contrast, SAFEs carry no interest , simplifying their financial and avoiding any ongoing cost to the startup. A key distinction arises in maturity and repayment obligations: convertible notes include a maturity date, usually 18 to 24 months from issuance, after which the startup must repay the principal plus if no conversion has occurred, potentially leading to , of repayment demands, or even risks for the company. SAFEs, however, have no maturity date or repayment requirement, removing this temporal pressure and allowing startups to extend their without the threat of forced or creditor actions. This absence of provisions in SAFEs further differentiates them, as there is no mechanism for investors to enforce repayment outside of equity conversion events. Both convertible notes and SAFEs feature similar conversion mechanics, converting into during a qualified financing round, often incorporating a (typically 10-20%) or a valuation cap to reward early investors with a lower effective share price. The primary difference in this process is the impact of : for convertible notes, the augments before conversion, yielding more shares for the investor compared to a SAFE of equivalent initial investment, where no such adjustment occurs. Startups often prefer SAFEs over convertible notes due to their avoidance of debt covenants, which in notes can impose restrictions on operations, additional fundraising, or financial decisions, thereby preserving greater flexibility for founders. By not appearing as liabilities, SAFEs also simplify accounting, reduce compliance burdens, and make the company more attractive to future debt providers or acquirers who might view note-related debt unfavorably. Overall, this equity-oriented structure positions SAFEs as a more streamlined and startup-friendly alternative, particularly in early-stage financing where minimizing administrative and financial complexities is paramount.

Versus priced equity rounds

A priced equity round involves investors purchasing shares at a fixed price per share, determined by an immediate valuation of the company, which results in the issuance of equity ownership right away. In contrast, a Simple Agreement for Future Equity (SAFE) defers valuation until a future triggering event, such as a subsequent priced round, where the investment converts into shares without requiring an upfront valuation or immediate share issuance. This deferral allows startups to avoid committing to a specific valuation during early stages when company metrics may be uncertain or underdeveloped. Priced equity rounds are generally more complex and costly due to the need for extensive , negotiation of detailed terms, board approvals, and preparation of comprehensive legal documents, often incurring legal fees ranging from $40,000 to $120,000 or more for or Series A financings. SAFEs, by design, streamline this process with a single, standardized document that requires minimal negotiation—typically limited to elements like a valuation cap—and enables individual closings with investors as funds arrive, reducing overall legal and administrative expenses significantly. This simplicity makes SAFEs particularly efficient for rapid without the prolonged timelines associated with priced rounds. In a priced equity round, dilution of founders' and existing shareholders' occurs immediately upon , as shares are issued based on the agreed-upon valuation and price per share. With SAFEs, dilution is postponed until at a future event, potentially allowing founders to retain higher percentages if the company achieves a higher valuation later, though this introduces uncertainty for investors regarding their eventual . Such delayed dilution can benefit startups by preserving control during growth phases. Priced equity rounds are typically suited for later-stage companies, such as Series A or beyond, where proven metrics like revenue or user growth justify a clear valuation and attract institutional firms seeking defined ownership. SAFEs, however, are better aligned with early-stage or pre-seed phases, where valuations are speculative and speed is prioritized over precision, enabling founders to secure capital quickly amid high uncertainty.

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