# K9 Chat — K9 Chat - E2EE based chat app > End-to-end encrypted, zero-trust chat for secure organizational communication. (iPhone/iPad app by Colohost LLC.) - Source: https://appshunter.io/ios/app/k9-chat/id1603886124 (this page in markdown: same URL + `.md`) - Developer: [Colohost LLC](https://appshunter.io/developer/1582364323) - Category: Social Networking, Productivity - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 18.5 · 250 MB - Languages: American English, Basque, Belarusian, Bulgarian, Croatian, Czech, Danish, Dutch, Estonian, Finnish and 27 more - Released: 2022-01-13 - Data updated: 2026-07-21 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/k9-chat/id1603886124/reviews.md ## What is K9 Chat? K9 Secure chat is an End-To-End Encrypted, "Zero Trust" based chat application providing anonymous communications without tracking possibilities - Audio, Video, Screenshare, Voice notes, and much more without efforts Note: Only usable with K9 servers - on-premise, cloud-based, or hybrid over secure networks maintaining the most possible level of security in communications within entities, governments, and closed teams. This app is not open for the public, Only download if you have access to a K9 Chat secure account provided by your administrator ## Key features - End-to-end encryption - Zero-trust communication - Anonymous messaging - Audio and video calls - Screensharing - Voice notes ## Frequently asked questions about K9 Chat ### What is K9 Chat? K9 Chat is an end-to-end encrypted, zero-trust chat application designed for secure communications within organizations. It allows for anonymous messaging and supports features like audio, video, and screensharing. ### Is K9 Chat free to use? Yes, K9 Chat is available for free. The provided data indicates it is free to download and use, with no in-app purchases or advertisements mentioned. ### Who can use K9 Chat? K9 Chat is not for public use. It is exclusively for users who have access to a K9 Chat secure account provided by their administrator, typically within entities, governments, or closed teams. ### What devices does K9 Chat support? K9 Chat is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS ecosystem. ### How secure is K9 Chat? K9 Chat utilizes End-to-End Encryption and a 'Zero Trust' architecture to ensure the highest possible level of security for communications. It aims to prevent tracking possibilities. ### When was K9 Chat last updated? The latest version of K9 Chat is 3.3.1, which was last updated on May 30, 2026. This indicates a recent update and ongoing development. ### What are the privacy features of K9 Chat? K9 Chat focuses on privacy through end-to-end encryption and a zero-trust model, ensuring that communications are anonymous and untrackable. It is designed for secure internal communications. ### Does K9 Chat have ads? No, K9 Chat does not contain advertisements. The application data specifies that it is free and does not have ads. ## Version history (last 5 releases) ### 3.3.15 — 2026-07-14 Real-time online status: contact presence is now reported live by the server. ### 3.3.14 — 2026-06-23 The presence dot on direct chats now always shows: green when the contact is active, orange when seen within the last day, and grey when offline. Questions: support@k9.ms ### 3.3.13 — 2026-06-17 Presence in 1:1 DMs: see "Active now", "Recently active", or "Last seen X" under the peer's name. Toggle it under Settings > Advanced > Show activity status. Questions: support@k9.ms ### 3.3.2 — 2026-06-15 Presence in 1:1 DMs: see Active now, Recently active, or Last seen X under the peer's name. Toggle: Settings -> Advanced -> Show activity status. ### 3.3.1 — 2026-05-30 Major refresh of K9 Chat: • End-to-end encrypted voice & video calls with full-screen ringing on locked devices • Instant-launch room list with sliding-sync • Polls, threads, location sharing, voice messages • Refreshed security stack with key history recovery via Secure Backup • Existing K9 1.x users: sign in again on first launch to migrate Build 37 fixes: voice call audio reliability; call screen returns to room timeline when remote party hangs up. ## Apps similar to K9 Chat | App | Rating | Price | Category | | --- | --- | --- | --- | | [Delta Chat](https://appshunter.io/ios/app/delta-chat/id1459523234) | 4.5 (113) | Free | Social Networking | | [Monal — XMPP Chat](https://appshunter.io/ios/app/monal-xmpp-chat/id317711500) | 3.7 (133) | Free | Social Networking | | [VoceChat](https://appshunter.io/ios/app/vocechat/id1631779678) | 4.5 (16) | Free | Social Networking | | [FluffyChat](https://appshunter.io/ios/app/fluffychat/id1551469600) | 4.0 (91) | Free | Social Networking | | [twinme private messenger](https://appshunter.io/ios/app/twinme-private-messenger/id889904498) | 3.8 (276) | Free | Social Networking | | [Talk to Strangers - Anichat](https://appshunter.io/ios/app/talk-to-strangers-anichat/id1400030716) | 4.1 (1,628) | Free | Social Networking | ## More apps by Colohost LLC - [VPSie](https://appshunter.io/ios/app/vpsie/id1294475478) All apps by Colohost LLC: https://appshunter.io/developer/1582364323 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-21.*