Fact-checked by Grok 2 weeks ago

Zello

Zello is a push-to-talk (PTT) mobile application developed by Zello Inc., an Austin, Texas-based software company, that enables real-time voice communication over cellular data or networks, replicating the functionality of traditional walkie-talkies on smartphones, tablets, and desktop devices. Originally launched as Loudtalks and rebranded under Zello, the app was co-founded by Alexey Gavrilov (CTO), Alexander Vinogradov, and Eugene Mymrin, with Bill Moore later joining as CEO to lead its expansion. Zello supports private channels, public broadcasts, location sharing, and emergency alerts, making it popular for professional teams in industries like and , as well as first responders, to whom the company provides free access for coordinating during crises. The application has proven resilient in high-stakes scenarios, including protest movements in , , , and , where users relied on it for anonymous coordination and intelligence sharing amid network disruptions or government interference. Zello encountered controversy following its inadvertent role in facilitating communication among participants in the , 2021, U.S. breach, after which the company banned thousands of channels linked to militias and violent threats, citing concerns over misuse while emphasizing its commitment to legal compliance and user safety.

Founding and Early Development

Origins and Initial Launch

Zello originated from the development of Loudtalks, a voice-over-IP application created by Alexey Gavrilov in in 2007. Designed initially as a program for Windows PCs, Loudtalks enabled push-to-talk voice communication over the , mimicking functionality for computers. The product was publicly announced at the 40 Mobile and Communications Conference in September 2007, marking its initial launch as a free tool aimed at facilitating instant voice chats among users. Early adoption was modest, with the application reaching 10,000 registered users by December 2007, primarily through word-of-mouth among tech enthusiasts. The transition to Zello began as the company sought to expand into mobile platforms and relocate operations. In 2011, Zello Inc. was formed, acquiring the Loudtalks technology and moving the development team to Austin, Texas. Gavrilov, serving as chief technology officer, collaborated with co-founders Alexander Vinogradov and Eugene Mymrin, while Bill Moore joined as CEO in December 2011, bringing experience from founding TuneIn. The rebranding from Loudtalks to Zello occurred in January 2012, coinciding with the release of mobile applications to capitalize on smartphone growth; an Android version launched in 2011, followed by iOS in April 2012. This shift emphasized cross-platform push-to-talk accessibility, with initial growth spurred by a BlackBerry app release in 2011 that attracted early mobile users.

Rebranding and Initial Growth

In late 2011, the Russian-based Loudtalks team, which had developed an early push-to-talk application inspired by messaging, recruited Bill Moore as CEO and relocated its development operations to . This move facilitated a strategic pivot toward broader market accessibility in the United States. In January 2012, the product was officially rebranded from Loudtalks to Zello, emphasizing a simplified, walkie-talkie-like voice communication tool over cellular and networks. The rebranding coincided with expanded platform availability, building on the app's release in 2011, which marked Zello's first significant user acquisition phase. An version followed in April 2012, enabling cross-platform interoperability and attracting early adopters seeking alternatives to or voice calls for group coordination. This timing leveraged the growing penetration, with Zello's model—offering free personal use alongside premium features—driving organic virality through public and private channels. Initial growth accelerated from 2011 onward, particularly after a app launch that presaged mobile expansion, positioning Zello as a lightweight, data-efficient option in emerging markets with variable connectivity. By February 2012, following the full relaunch under the Zello name, the app benefited from U.S.-based infrastructure improvements, including enhanced server reliability and marketing efforts targeted at enterprise and consumer segments. User metrics reflected this momentum: while exact early download figures remain , the platform's for low-bandwidth environments fueled adoption in regions like and , where traditional costs were prohibitive. Zello's emphasis on real-time, one-to-many distinguished it from competitors like Voxer, contributing to sustained linear through effects in and use cases.

Technological Features

Core Push-to-Talk Functionality

Zello's core push-to-talk (PTT) functionality emulates traditional communication by enabling users to transmit real-time voice messages via a , where pressing a or physical captures and broadcasts audio instantaneously to recipients, and releasing the button allows listening in half-duplex mode. This design supports one-way transmission at a time, preventing audio overlap and ensuring clear reception across designated contacts or channels without requiring dialing or call setup. The app operates over networks, leveraging cellular data (including /GPRS for low-bandwidth environments) and to deliver low-latency audio, with a proprietary PTT protocol optimized for speed and reliability. Channels form the backbone of group PTT interactions, allowing unlimited private or public groupings where users join via invitations or , and broadcasts reach all active members simultaneously for coordinated communication. Audio quality remains crystal-clear even in areas with intermittent connectivity, as the system buffers and replays missed transmissions upon reconnection, minimizing disruptions in dynamic scenarios. with external , such as dedicated PTT buttons or rugged devices, extends usability by mapping physical presses to app triggers, broadcasting intents for press/release events to initiate or end transmissions. This supports tactile operation in demanding fields like or response, where screen interaction may be impractical. Security in PTT operations includes encrypted channels to protect transmissions, though versions rely on standard app-level safeguards while deployments offer enhanced private networks. The protocol's non-interoperability with competing PTT systems, such as Voxer or carrier-specific services, stems from Zello's custom low-latency implementation, prioritizing seamless intra-app performance over cross-platform compatibility. Overall, this functionality has enabled Zello to serve over 150 million users globally by providing instant, device-agnostic voice bridging without specialized radio infrastructure.

Additional Capabilities and Security

Zello provides several features extending beyond its core push-to-talk (PTT) functionality, including customizable and channels that support simultaneous participation across multiple groups for . Users can share exact locations with contacts or channels, including timestamps and map views, facilitating coordination in dynamic environments. Additional tools encompass , , message history retention, and persistent alerts to notify recipients of incoming transmissions. In contexts via Zello Work, administrators access tracking through a management console map, enabling oversight of user positions globally. The app also incorporates AI-driven speech-to-text transcription for voice messages, activated upon enabling, to generate searchable text logs and enhance communication efficiency as of January 2024. Emergency alerts allow users to broadcast high-priority audio recordings paired with to designated channels or contacts with a single button press. On security, Zello employs (TLS) for connections, firewalls, and protocols to protect , with options configurable in advanced settings for usage. Zello Work utilizes 1024-bit algorithms for user authentication, digital signatures, and establishing secure media sessions, alongside AES-256 for message , creating isolated private networks separate from the consumer version. These measures aim to safeguard voice, text, and transmissions, though the platform has faced scrutiny following a reported data exposure incident in late 2024, prompting recommendations for resets to mitigate credential compromise risks. Zello maintains compliance-oriented security programs, including organizational controls integrated into its operations as outlined in technical documentation.

Products and Business Model

Consumer Zello App

The Consumer Zello App is a free mobile application offering push-to-talk (PTT) voice communication over cellular networks and , simulating traditional functionality without requiring specialized hardware. Initially launched for devices in 2011 and expanded to in 2012, it enables users to connect via private one-to-one calls, group chats, or public channels for voice messaging. The app supports , photo sharing, and message replay features, with voice transmissions delivered in under 200 milliseconds for low-latency interaction. Available on the Apple App Store and Google Play Store, the app has garnered high user ratings, including 4.6 out of 5 stars from over 33,000 reviews on iOS and 4.2 out of 5 from nearly 800,000 on Android as of recent data. It operates on a freemium model, providing core PTT capabilities at no cost for individual users while upselling premium enterprise features through Zello Work for business scalability. This consumer version targets personal and informal group communication, such as coordinating with family, friends, or hobbyist communities, distinguishing it from the paid Zello Work platform's dispatch consoles and AI integrations. As of 2021, the app had surpassed 150 million registered users across over 200 countries, processing approximately 10 billion live voice messages monthly. Growth accelerated during events like natural disasters, with nearly 10 million downloads during Hurricanes Harvey, Irma, and Maria in , highlighting its utility for ad-hoc coordination in disrupted environments. The app's channel system allows users to join or create public feeds for broader discussions, fostering communities around interests like gaming, events, or local groups, though public channels can expose users to unmoderated content.

Zello Work Enterprise Solution

Zello Work is an enterprise-grade push-to-talk (PTT) communication platform designed for businesses requiring reliable, instant voice messaging among distributed teams, particularly deskless and frontline workers. It extends the core Zello app's functionality with managed networks, administrative controls, and for organizational use, supporting features like unlimited-range channels, voice playback, one-to-one and group messaging, status updates, alerts, notifications, and a centralized dispatch hub. The solution targets industries such as , transportation, food and beverage, and , where real-time coordination is essential for operations involving field staff, drivers, or remote personnel. Deployment options include cloud-hosted networks managed by Zello, with 99.99% uptime and dynamic , or on-premise servers for environments with unreliable or heightened needs. starts at $8 per user per month for the , with annual subscriptions discounted to $6.80 per user per month; higher-tier Plus plans are available at $12.75 per user per month, while custom configurations require sales consultation and offer volume discounts. features encompass (MDM) integration, (SSO), dashboards, integrations, and remote device wipe capabilities to address and oversight requirements. Security measures include for voice communications, with 1024-bit keys used for authorization, digital signatures, and secure key exchange in on-premise setups; cloud transmissions employ similar protocols alongside role-based access controls. Zello Work has attained SOC 2 Type II compliance, verifying controls for security, availability, processing integrity, confidentiality, and privacy. Businesses adopt it for scenarios like coordinating hotel staff across properties, dispatching transportation fleets, or managing warehouse teams, with case studies highlighting improved response times and reduced reliance on traditional radios.

Usage in Crises and Protests

Role in Natural Disasters and Emergencies

Zello has facilitated communication among civilians, volunteers, and during multiple , particularly where cellular voice services were disrupted but connectivity persisted via data or . The app's push-to-talk channels enable real-time group voice messaging over low-bandwidth connections, allowing users to coordinate search-and-rescue operations without relying on traditional calls. However, Zello requires an active connection and does not function offline, limiting its utility in areas with complete network failure. During in August 2017, Zello saw a surge in downloads and usage as volunteer groups like the employed it to organize boat-based rescues in flooded areas of , where overwhelmed cell towers hindered standard communications. The app's channels connected rescuers with those needing evacuation, enabling crowdsourced efforts to supplement official responses. Similar patterns emerged during later that month, with users in and other affected regions using Zello for live coordination amid widespread power outages and network congestion. In the September 2017 Mexico City earthquake, Zello aided civilian-led rescue teams in low-bandwidth environments, allowing voice updates from rubble sites and coordination of supply distribution. During in September 2018, the app supported emergency communications in North and , functioning over weak cellular data signals where voice calls failed. Government and nonprofit analyses have noted Zello's role in emergent, technology-enabled volunteer networks, though its effectiveness depends on users' prior familiarity and available data access.

Applications in Political Protests and Activism

Zello's push-to-talk functionality has enabled real-time voice communication among protesters in multiple political movements, allowing coordination of movements, sharing of situational intelligence, and evasion of traditional surveillance methods. In environments with but disrupted cellular networks, users form public or private channels to broadcast updates on security force positions and rally logistics, often preferring it over or for its immediacy and group scalability. During the against government policies, demonstrators relied on Zello to organize street actions and monitor police deployments, with multiple participants describing it as essential for gathering. Similarly, in the 2019 Venezuelan crisis, opposition groups used the app to locate supplies and plan demonstrations amid shortages and repression. In Hong Kong's 2019 anti-extradition protests, frontline activists adopted Zello starting in October to relay urgent tactical information during rallies, shifting from other tools due to its reliability in dynamic, high-risk settings. Zello saw early adoption in Ukraine's 2013–2014 Revolution, where protesters in Kyiv's Independence Square employed it during initial unrest to communicate amid government crackdowns. The app's role extended to other repressive contexts, such as Russia's 2017 anti-corruption protests, where authorities blocked access to over 400,000 users to hinder coordination. More recently, in 2024 Kenyan Gen Z-led protests against tax hikes, participants downloaded Zello en masse for venue planning and real-time updates. In the United States, Zello channels facilitated communication among some participants in the , 2021, events, including groups like the using public feeds such as "STOP THE STEAL J6" for on-site directives around 2:44 p.m. Audio logs from these channels, later subpoenaed in trials, captured exchanges urging group cohesion and alertness during the breach. Zello subsequently banned identified militia channels and enhanced following the incident. The app's neutral platform design has thus supported both pro-democracy and organized extremism, highlighting its dual-use potential without inherent content controls.

Controversies and Regulatory Actions

Government Blocks and Censorship Attempts

In Russia, authorities attempted to compel Zello to store user data locally in compliance with data localization laws, but following the company's refusal, Roskomnadzor blocked access to the app nationwide on April 10, 2017, amid trucker protests against government fuel price policies, affecting approximately 400,000 users. The block was justified by regulators as a response to non-compliance with federal requirements for data retention and sharing, though Zello maintained that such demands violated user privacy and that the app's decentralized peer-to-peer architecture limited centralized control. In March 2022, amid the invasion of Ukraine, Russian officials again contacted Zello demanding it cease transmission of messages deemed to contain "false information" about the conflict; non-compliance led to a renewed ban by Roskomnadzor, restricting the app's use for coordinating opposition activities or disseminating unapproved narratives. Venezuela's government-directed censorship targeted Zello during widespread anti-regime protests in February 2014, when the state-owned ISP blocked access to the app, preventing protesters from using its push-to-talk channels for coordination. Zello's CEO confirmed the blockade, attributing it to efforts to disrupt opposition communications, as the app had become a key tool for organizing demonstrations against Nicolás Maduro's administration amid economic turmoil and . Users circumvented the restrictions via VPNs and alternative networks, highlighting the app's resilience but also the regime's pattern of throttling tools perceived as threats to control. Other authoritarian regimes have imposed outright bans or de facto restrictions on Zello to curb its role in dissent. China and Syria maintain comprehensive prohibitions on the app as part of broader internet controls limiting foreign communication platforms, preventing downloads and usage without circumvention tools. These measures reflect governments' prioritization of information suppression over , with Zello's utility in voice channels making it a recurring target during unrest, though specific enforcement dates vary and often evade precise documentation due to opaque regulatory processes.

Security and Privacy Concerns

Zello's communications employ encryption, with end-to-end protection claimed for private one-to-one voice messages and direct contacts in the consumer app, while channel transmissions are encrypted between sender-server and server-recipient. The enterprise version extends end-to-end encryption across interactions, using industry-standard protocols to secure data in transit and prevent interception. However, these measures apply primarily to message content, leaving user metadata—such as contact lists, location data if enabled, and usage patterns—potentially accessible to Zello's servers for operational purposes. The company's outlines collection of including addresses, device identifiers, and addresses to provide services, detect , and comply with legal requests, with sharing permitted to affiliates, service providers, and authorities under or similar mandates. Critics have noted insufficient safeguards against unauthorized access, as evidenced by repeated incidents exposing user credentials. Zello does not offer self-destructing messages or zero-knowledge proofs for authentication, raising concerns for users in high-risk environments like where persistent could enable retroactive . In July 2020, Zello detected unauthorized access to a database containing email addresses and hashed passwords for an undetermined number of users, prompting a mandatory password reset and enhanced monitoring. A subsequent incident in November 2024 involved suspicious activity affecting accounts created before November 2, leading to another widespread password reset advisory and recommendations to update credentials across linked services amid fears of credential stuffing or breach escalation. These events highlight vulnerabilities in authentication systems, despite hashed storage, as attackers could exploit weak hashing or combine with other leaks for phishing. Beyond breaches, Zello's role in facilitating unmoderated channels has indirectly amplified risks, with reports of groups using the app for coordination without prompt removal, potentially exposing participants to doxxing or targeted monitoring if channels are subpoenaed. The prohibits violent but relies on user reports, leaving gaps where logs could be retained for compliance reviews. Users concerned with maximal are advised to enable two-factor authentication where available and avoid sharing sensitive identifiers, though the app's centralized architecture inherently limits compared to decentralized alternatives.

Impact and Reception

Adoption and User Base Growth

Zello's consumer app experienced steady initial adoption following its launch, reaching 100 million registered users by February 2017 after nearly nine years of operation. This milestone reflected organic growth through word-of-mouth and its utility as a free push-to-talk alternative to traditional walkie-talkies over cellular data networks. User numbers expanded to over 120 million worldwide by the end of 2018, supported by enhancements to both the free app and emerging business features. Growth accelerated during high-demand periods, such as the week leading up to in September 2017, when downloads surged by 6 million users amid preparations for the storm. By December 2020, Zello's community had grown to 150 million users across more than 200 countries, with the platform handling billions of messages monthly. In April 2021, the company reported adding approximately 1 million users per month and 4,000 new channels daily, underscoring sustained momentum. As of June 2022, registered users exceeded 170 million, coinciding with a $20 million funding round to scale its offerings while the app drove broader adoption among individuals and teams. The app's availability on and , combined with its model, has sustained a global footprint, though recent public statistics remain limited to these figures.

Criticisms of Reliability and Alternatives

Zello's reliability has been criticized for its dependence on internet connectivity via cellular data or , rendering it ineffective during outages common in severe disasters or remote areas. For instance, if cellular towers fail or data services are overwhelmed, users cannot communicate, as the requires an active to function, unlike traditional radio systems that operate on dedicated frequencies. This limitation was highlighted in user discussions during hurricanes, where Zello's utility diminished when collapsed, prompting warnings that it offers no advantage over standard messaging apps in total blackouts. Additional concerns include accelerated battery drain on mobile devices, particularly during continuous monitoring or in low-signal environments, where the app's background processes and frequent connectivity checks exacerbate power consumption. Reviews from users note intermittent issues in areas with weak coverage, leading to dropped transmissions or delayed responses, though Zello maintains a high server uptime of 99.99%. Alternatives to Zello include other push-to-talk (PTT) software applications such as Voxer, which supports live voice alongside text and media sharing but shares similar dependency. Hardware-based options, like (FRS) or (GMRS) devices from manufacturers such as , provide offline, line-of-sight communication without relying on cellular networks, offering greater resilience in grid-down scenarios up to several miles. For enterprise or crisis use, satellite messengers like inReach enable global coverage independent of terrestrial infrastructure, though at higher costs and with messaging limitations compared to Zello's group channels.

References

  1. [1]
    Zello | The Most Reliable Push-to-Talk Walkie-Talkie App
    Zello's push-to-talk walkie-talkie app lives on your phone, delivering unlimited and secure private channels and crystal clear broadcasts over cell networks ...Zello · Pricing · Android · iOS
  2. [2]
    Zello PTT Walkie Talkie - Apps on Google Play
    Rating 4.2 (793,316) · Free · AndroidTurn your phone or tablet into a walkie talkie with this lightning fast free PTT (Push-To-Talk) radio app. Talk to your contacts privately or join public ...
  3. [3]
    How Zello Got Its Start - The Zello Blog
    Jan 5, 2021 · We sat down with co-founder and CTO, Alexey Gavrilov, co-founders Alexander Vinogradov and Eugene Mymrin, and CEO, Bill Moore, to see where Zello has been and ...
  4. [4]
    Meet Team Zello: CTO Alex Gavrilov - The Zello Blog
    Mar 27, 2019 · Most of the original work was done by Alexander Vinogradov and Eugene Mymrin, who are still employed by Zello. What motivated you to start Zello ...
  5. [5]
    Emergency Response - Zello
    Zello, the emergency dispatch software and push-to-talk solution for first responders, is 100% free for eligible organizations. Save lives, time, and money.
  6. [6]
    Zello Reviews & Product Details - Hotel Tech Report
    Zello is a walkie talkie app designed for smartphones and tablets, utilizing Wi-Fi and cellular data to facilitate real-time communication. Beyond the ...
  7. [7]
    This app is fueling the uprising in Venezuela - Quartz
    In emails, multiple protestors said that they saw Zello as an essential tool for coordinating movement, collecting intelligence on the location of government ...
  8. [8]
    Protesters in Venezuela, Ukraine turn to peer-to-peer messaging app
    Feb 24, 2014 · Zello allows smartphone users to send short voice messages from person to person or to a limited group of people. Some Ukrainians and ...Missing: controversies | Show results with:controversies
  9. [9]
    Kenya's protests played out on walkie-talkie app Zello - Rest of World
    Jul 16, 2024 · Thousands of Kenyans used Zello, an app that mimics a walkie-talkie, to coordinate movements and communicate anonymously during recent protests ...
  10. [10]
    How Zello keeps people connected during South Africa's unrest
    Jul 20, 2021 · But recent events suggest that use of Zello is increasingly being used to connect people in areas of unrest as well. Within hours of the ...Missing: controversies | Show results with:controversies
  11. [11]
    Zello Takes Action Against Militias
    Jan 13, 2021 · Looking ahead, we are concerned that Zello could be misused by groups who have threatened to organize additional potentially violent protests ...Missing: controversies | Show results with:controversies
  12. [12]
    DC rioters reportedly used walkie-talkie app Zello to storm Capitol
    Jan 14, 2021 · At least two members of the mob used Zello to talk with other people who appeared to be inciting them from other locations, the Guardian ...
  13. [13]
    Walkie-Talkie App Zello Purges Thousands Of Far-Right Channels ...
    Jan 15, 2021 · Audio and chat logs show users and militia members shared information on the app while illegally storming the Capitol building.
  14. [14]
    10,000 - The Zello Blog
    Today, three months from the first public appearance at TechCrunch40 we reached an important milestone of 10,000 registered users.Missing: initial launch
  15. [15]
    Meet Team Zello: CEO Bill Moore
    Mar 26, 2019 · Today, we present a Q & A with Bill Moore, the CEO and co-founder of Zello Inc: What is your background? What were you doing prior to Zello?
  16. [16]
    Voice Chat App Voxer Gets New Competition From Zello, A (Non ...
    Jun 20, 2012 · LoudTalks brought on Moore as CEO in December and officially rebranded to Zello in January. The Zello app on iPhone launched in April, joining ...
  17. [17]
    Let the Data Speak: Zello Celebrates 150 Million Users
    Dec 10, 2020 · While Zello was launched in 2007, our first major growth spurt began with the release of a Zello Blackberry application in 2011. In a matter ...Missing: founding | Show results with:founding
  18. [18]
    Zello Celebrates 100 Million Users
    Feb 1, 2017 · Zello started out as "Loudtalks" in Russia back in 2007. The original Loudtalks application was designed for Windows PC, and allowed users to ...Missing: initial | Show results with:initial
  19. [19]
    Zello's Explosive Growth by Design, and Freemium to Enterprise ...
    Zello's unique, growth-oriented product design has enabled it to take advantage of massive linear growth opportunities.Missing: rebranding initial
  20. [20]
    Digital Push-to-Talk is the Best of All Worlds - The Zello Blog
    Jan 25, 2022 · With push-to-talk technology, users push a PTT button (either physical or digital) to speak across a communication line, and de-press the button ...Missing: functionality | Show results with:functionality
  21. [21]
    Zello PTT Button Partner Technical Integration
    Apr 28, 2025 · PTT buttons should broadcast an intent when they are pressed and released. Extra buttons can also function as additional PTT buttons which can ...
  22. [22]
    Construction - Zello
    Our UI is intuitive and it's easily mapped to rugged devices with tactile push-to-talk and emergency buttons for when the job site demands it. If they can push ...Missing: functionality | Show results with:functionality
  23. [23]
    Channels - Zello
    With Zello, you can stay connected to multiple push-to-talk channels simultaneously. If you're talking on one channel and someone contacts you on another, their ...<|separator|>
  24. [24]
    Location Sharing - Zello Support
    Aug 29, 2024 · Location sharing allows you to send your exact location to both contacts and channels. Recipients will receive your exact address accompanied by a timestamp.
  25. [25]
    How to Use Zello Groups & Channels
    Mar 9, 2022 · Both group and channel options offer live audio, texting, persistent alerts, image and location sharing, as well as history. Other differences ...Missing: capabilities | Show results with:capabilities
  26. [26]
    Location Tracking – Zello Work
    Apr 28, 2025 · Location Tracking allows you to track your Android and iOS users from the Map available on the ZelloWork Management Console.Missing: capabilities | Show results with:capabilities
  27. [27]
    Push-to-Talk App Zello Launches Instant Transcriptions for Faster ...
    Jan 11, 2024 · When transcriptions are enabled, Zello uses AI-based speech to text to automatically transcribe the message. Message transcription joins ...
  28. [28]
    Zello Feature: Emergency Alerts
    Mar 13, 2022 · With Zello's Emergency Alerts, team members simply press a button to send an audio recording and their location with high priority to a designated emergency ...<|control11|><|separator|>
  29. [29]
    Privacy Policy - Zello
    Jul 9, 2025 · For example, we use available technology and other techniques to implement systems like firewalls, and/or encryption to secure data transfers.
  30. [30]
    Advanced Settings - Zello Support
    Sep 6, 2024 · These features go into effect when your device is using a WiFi connection. ... Security. Enable TLS: This enables transport layer security ...
  31. [31]
    What encryption algorithms does Zello Work use?
    Apr 28, 2025 · The following algorithms are used for Zello Work security: 1024 bit RSA for authentication, digital signatures, and secure media session...
  32. [32]
    Zello Friends & Family vs. Zello Work
    Sep 23, 2024 · Zello Work is Zello's secure, configurable, and scalable solution for businesses that provides provisioned users a private workspace to...
  33. [33]
    Users Advised to Reset Passwords After Zello Data Breach
    App users can start one-to-one or group conversations that are fully encrypted end-to-end, and instantly send voice messages or photos. Data breaches appear to ...
  34. [34]
    Technical and Organizational Security Measures - Zello
    The current Technical and Organizational Security Measures implemented by Zello have been integrated into our overall Security and Compliance Program Overview ...
  35. [35]
    Zello Walkie Talkie on the App Store - Apple
    Rating 4.6 (33,551) · Free · iOSZello is the #1 push-to-talk, walkie talkie app with over 150 million users in over 200 countries. Get things done efficiently by talking to any group or ...Missing: years | Show results with:years
  36. [36]
    Zello company information, funding & investors - Dealroom.co
    Zello's business model is based on a freemium approach. The basic version of the app is free for individual users, offering essential PTT functionalities.
  37. [37]
    Zello for Family, Friends, & Business
    May 18, 2019 · Zello is the leading push to talk app and business service; we offer a free walkie talkie app for individual use and a push to talk service ...<|separator|>
  38. [38]
    10 Must-Know Facts About Zello
    Apr 21, 2021 · Zello got its start back in 2007 with the idea of taking push-to-talk communication from the radio to the smartphone. (You can read all ...Missing: initial launch
  39. [39]
    Enterprise - Zello
    Zello for enterprise and business needs. Stay compliant with Zello MDM, SSO, and legal solutions. Get Zello analytics and integration.Missing: target markets
  40. [40]
    Zello Software Reviews, Demo & Pricing - 2025
    Rating 4.7 (65) Features include PTT, unlimited range and channels, voice playback, 1:1 and group messaging, status updates, alerts and notifications, a dispatch hub, and more.Missing: target | Show results with:target
  41. [41]
    Transportation - Zello
    Zello gets the frontline moving. Every day is a journey for any business that keeps things moving. Keep your drivers safe and your dispatchers happy.Missing: studies adoption
  42. [42]
    Zello Reviews 2025: Details, Pricing, & Features - G2
    Zello is ideal for businesses with deskless workers, field workers, remote workers, and lone workers. Use cases in this category include hotels with various ...<|separator|>
  43. [43]
    Zello Enterprise Server (ZES) Overview
    Apr 30, 2025 · Zello's Enterprise Server offers customers the ability to host their Zello environment locally on their own server.
  44. [44]
    Pricing - Zello
    Send live voice, texts, photos, and more · Private, encrypted network · Unlimited channels · Manage users, channels, and settings · Real-time location tracking ...
  45. [45]
    Zello Pricing 2025
    Zello Pricing Overview ; Cloud. $6.80per user per month (paid annually). For team communication - We host your network on our servers. Native apps for iOS, ...Missing: target | Show results with:target
  46. [46]
    How does Zello Work differ from Zello Friends & Family?
    Apr 28, 2025 · With Zello Work, you will get a secure and private network with full control over who can access the network and which users communicate with ...<|separator|>
  47. [47]
    Are voice communications secure and encrypted on the ... - Zello Work
    May 16, 2025 · Voice communications sent over your on-premise server are secure and encrypted. Zello uses RSA 1024 bits for authorization, digital signatures, and secure ...Missing: security | Show results with:security
  48. [48]
    Customer Stories - Zello
    Read our case studies illustrating how Zello can improve communications for your business or organization.Missing: download statistics
  49. [49]
    Zello 'walkie-talkie' natural disaster app requires internet access
    Sep 1, 2021 · Channels can be created for different uses, such as search and rescue efforts, or group efforts to secure supplies and prepare for the natural ...
  50. [50]
    When Disaster Hits and Landlines Fail, Social Media Is a Lifeline
    Sep 23, 2017 · Zello, one of the messaging apps used by Ms. Mitchell, was introduced in 2012 and was created to work in low-bandwidth environments. It has ...Missing: case studies
  51. [51]
    'Walkie talkie' app Zello tops App Store during hurricanes - BBC News
    Sep 11, 2017 · An app that enables people to have live conversations in large groups is being used as an unofficial rescue co-ordination tool during the US ...Missing: studies | Show results with:studies
  52. [52]
    Using Zello in Hurricanes Harvey & Irma
    Mar 20, 2019 · Zello, our free push-to-talk app for personal use, was a big help to the Cajun Navy and other search and rescue teams during Hurricanes Harvey ...
  53. [53]
    a case study of the Cajun Army - ResearchGate
    Aug 6, 2025 · During recent hurricanes and floods in coastal Louisiana and Texas, groups such as the Cajun Navy utilised Zello – an agile variation of Short ...
  54. [54]
    How can Zello and Firechat help during Hurricane Florence?
    Sep 12, 2018 · The Zello app is a walkie-talkie app that works over wi-fi or weak cell signals. Firechat works without wi-fi or cell service in a 200-foot ...
  55. [55]
    3 Revolutions Powered by Social Media - The Zello Blog
    Apr 5, 2019 · Walkie talkie apps like Zello play a large role in political revolutions like in Venezuela, Hong Kong, and Arab Spring. Zello's free walkie ...
  56. [56]
    Protesters use new walkie talkie app called ZELLO to transmit ...
    Oct 19, 2019 · 19th October 2019 – (Hong Kong) Frontline protesters have switched to a new app called ZELLO that turns your phone into a walkie talkie and ...
  57. [57]
    https://nypost.com/2019/04/08/this-app-is-serving-as-a-lifeline-for-desperate-venezuelans/
  58. [58]
    From Zello To Walkie-Talkies In Venezuela And Ukraine | IBTimes
    Mar 17, 2014 · Protesters in Kiev's Maidan Nezalezhnosti, or Independence Square, used Zello during the initial days of the Ukrainian uprising. As the protests ...
  59. [59]
    One of the World's Top Protest Apps Was Just Blocked in Russia
    Apr 12, 2017 · The government is denying more than 400000 Russian users access to Zello, which has been used to coordinate protest actions in several countries
  60. [60]
    Digital activism in Africa and the Gen Z protests: the youth ... - Hivos
    Dec 17, 2024 · Within days, users had circulated a date, venue and dress code on social media and were downloading the Zello walkie-talkie app en masse. What ...<|separator|>
  61. [61]
    Revealed: walkie-talkie app Zello hosted far-right groups who ...
    Jan 13, 2021 · “Looking ahead, we are concerned that Zello could be misused by groups who have threatened to organize additional potentially violent protests ...
  62. [62]
    The Zello Tapes: The Walkie-Talkie App Used On January 6th
    Jul 2, 2021 · In this piece, which first aired in January, we share the audio they captured of a woman storming the Capitol, emboldened by other Zello users ...
  63. [63]
    Zello: A Recruitment & Organizing Tool For The Far Right
    Jul 2, 2021 · Zello, a walkie-talkie social media app favored by far-right groups, to understand how they organized ahead of the 2020 election and what can be done to stop ...
  64. [64]
    Russia Blocks Zello
    Apr 12, 2017 · Zello's walkie talkie app is blocked by Russian authorities. Russia has blocked other social media outlets like LinkedIn.Missing: censorship | Show results with:censorship
  65. [65]
    Russia bans walkie-talkie app Zello - ZDNET
    Mar 7, 2022 · Officials in Russia said they contacted Zello to stop sending messages to users that contain false information about the invasion of Ukraine.Missing: censorship attempts
  66. [66]
    Russia bans Zello's walkie-talkie app - Engadget
    Mar 7, 2022 · Russia's telecom regulator Roskomnadzor has banned the walkie-talkie app Zello over claims users were spreading false information about the invasion.
  67. [67]
    The Phone App Venezuela's Government Can't Shut Down - VICE
    Feb 26, 2014 · The largest ISP in Venezuela blocked Zello last Thursday, and many believe it was at the request of the government. Zello developers immediately ...
  68. [68]
    Venezuela blocks Zello app popular among protesters: CEO
    Feb 21, 2014 · Even before the latest round of protests, Venezuela had been blocking websites that track the black market rate for the country's currency and ...
  69. [69]
    Are voice messages encrypted? - Zello Support
    Oct 24, 2024 · All voice messages sent privately to your contacts are end-to-end encrypted on Zello Friends & Family.
  70. [70]
    Privacy Evaluation for Zello Walkie Talkie
    Jun 9, 2023 · These evaluations are designed to help educators make informed decisions about the potential privacy implications of educational technology used ...
  71. [71]
    Zello urges users to reset passwords following a cyber attack
    Nov 29, 2024 · In August 2020, the company disclosed a data breach, user information exposed in the incident included email addresses and hashed passwords.
  72. [72]
    Zello asks users to reset passwords after security incident
    Nov 27, 2024 · Zello is warning customers to reset their passwords if their account was created before November 2nd in what appears to be another security breach.<|separator|>
  73. [73]
    Zello tells users to reset passwords following suspected data breach
    Nov 29, 2024 · Push-to-talk app Zello warns users to change their passwords immediately · It also told them to change the passwords for any other online service ...
  74. [74]
    Zello faces potential data breach, urges customers reset passwords
    Nov 28, 2024 · Zello, a voice-first communication platform widely used by frontline workers, appears to have experienced a potential data breach or credential stuffing attack.
  75. [75]
    Voice Chat App Zello Turned a Blind Eye to Jihadis for Years | WIRED
    Mar 16, 2018 · In the early morning of September 9, 2016, Bill Moore, CEO of the Austin-based walkie-talkie app company Zello, contacted the Middle East ...<|separator|>
  76. [76]
    Safety and Privacy - Zello Support
    Safety and Privacy. Learn about product features and actions you can take to stay safe on Zello. Getting Started · New users · General information.
  77. [77]
    Zello's Year in Review: 2018
    Dec 21, 2018 · We support over 120 million users worldwide. This past year we've added many new features for both the free Zello app and business service. We' ...Missing: milestones | Show results with:milestones<|separator|>
  78. [78]
    Press - Zello
    Zello makes its enterprise push-to-talk service free to first responders globally to improve COVID-19 assistance.Missing: initial | Show results with:initial<|control11|><|separator|>
  79. [79]
    Zello Gets $20M for Voice Communication Platform Used by ...
    Jun 8, 2022 · When he decided to form a company, he brought on CEO Bill Moore, the founder and then-CEO of the TuneIn radio app, whom he met while developing ...
  80. [80]
    Zello Walkie Talkie - Overview - Apple App Store - US - Sensor Tower
    Rating 4.5 (108,193) · Free · iOSZello is the #1 push-to-talk, walkie talkie app with over 150 million users in over 200 countries. Get things done efficiently by talking to any group or person ...Missing: adoption | Show results with:adoption
  81. [81]
    As Hurricane Irma Hits, People Turn to Zello App | PCMag
    Sep 11, 2017 · That means if your Wi-Fi and cellular data go down, you won't be able to use Zello (or any other communication apps, for that matter). Gavrilov ...
  82. [82]
    Zello walkie talkie app limited during outages - Facebook
    Sep 12, 2018 · PSA the Zello Walkie Talkie App DOES NOT Work if the cell towers/ WiFi/Data are DOWN. It has very limited function during a natural disaster ...Is the Zello Walkie Talkie App effective when other services are down?DON'T BELIEVE THIS! People are talking about the Zello app that ...More results from www.facebook.com
  83. [83]
    Seen this app floating around on FB today. Download Zello to stay in ...
    Aug 28, 2021 · ... down. It is no more effective than Facebook messenger, WhatsApp ... 9d ago. Cell service outage in Michigan? 10 upvotes · 6 comments ...
  84. [84]
    Zello Reviews 2025. Verified Reviews, Pros & Cons - Capterra
    Rating 4.7 (65) Plus, the battery life is great! Cons. In some of our territory locations, cell phone signal is very low. This can cause some issues but luckily we do not ...
  85. [85]
    Suggestions to reduce battery drain on user devices - Zello Work
    Apr 28, 2025 · Setting Zello to run continuously by using frequent keep-alive checks will reduce a device's battery life. To reduce the number of attempts made ...Missing: issues | Show results with:issues
  86. [86]
    Reliability - Zello
    Zello has 99.99% historical uptime, automatic monitoring, offline messaging, off-site backups, and enterprise-grade support for reliability.Missing: protests | Show results with:protests
  87. [87]
    Top 10 Zello Alternatives & Competitors in 2025 - G2
    The best Zello alternatives are Voxer Business, Orion, and Workvivo. Find top-ranking free & paid apps similar to Zello for your Push-To-Talk (PTT) Software ...Missing: comparison | Show results with:comparison
  88. [88]
    Walkie Talkie App Comparison: Features, Security, and User ...
    Zello. Security Measures: Encryption: Zello offers encryption for both voice and text messages to protect user data. User Verification: Verifies users to ...