Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Software as a Service (SaaS)








Campfire is an installable, self-hosted group chat system. Easily invite people. Make rooms. @mentions, DMs, and mobile support. The basics done right. And since you get the code and host it yourself, you can customize it however you’d like for your own use.



Freenet is a peer-to-peer platform for decentralized applications—communication, collaboration, and commerce without reliance on big tech. Your computer becomes part of a global network where apps are unstoppable, interoperable, and built on open protocols.

Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.

Twist is a team communication service that emphasizes conversation organization and work relevance. It does so in a way that promotes asynchronous communication for more thoughtful discourse.




Quaternion is a cross-platform Qt5-based desktop IM client for Matrix, a reference desktop application using libQMatrixClient. Source code, issue tracker, roadmap etc. can be found at GitHub. Releases (with links to cross-platform source code archives, as well as binaries for...


Real-time chat with friends, group messaging, media sharing, invite links, and customizable notifications on desktop and mobile for gaming coordination.



Fully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).










AyuGram is a Telegram client focusing on improving life with features that can't be implemented in regular clients.
Group messaging platform owned by Microsoft. It's absolutely free, whether you're talking to a group of friends, or texting with one person. Best of all, it works on nearly every phone, via push or SMS. With GroupMe, it's easy to reach anyone, anytime, anywhere.




nospeak is a decentralized Nostr chat client for secure, private messaging. It is easy to use but has state of the art end-to-end encryption without metadata leakage.



Chitchatter is a free (as in both price and freedom) communication tool. Designed to be the simplest way to connect with others privately and securely, it is:





GameVox is a voice, video, and text chat platform for gaming communities, built by LightSpeed Gaming — a small, independent company with well over a decade of experience in voice communication and game server hosting. Self-funded. No investors, no ads, no data sales.




Prose is a distributed, open-source, and native platform for workplace communication.






Customizable digital office lets remote and hybrid teams collaborate in real time with video calls, presence indicators, chat, file sharing, and calendar integration.




A globally distributed messaging and voice/video platform built for communities that value speed, privacy, and reliability.
Ventrilo is a real-time voice chat software for group communications with surround sound support.


OpenBubbles is an open-source and cross-platform ecosystem of apps aimed to bring Apple platform services to Android and Windows! With OpenBubbles, you'll be able to send messages, media, and much more to your friends and family.




Adobe Connect is a software solution for creating presentations, online training materials, web conferencing, learning modules, webinars, and desktop sharing. Its structure is based on 'pods', organized meeting rooms each with a specific function like chat, whiteboard...




Established in 2002, 321Chat is one of the webs longest running chat sites. The chat rooms work on all mobile devices and are packed with features everyone can use. Select a chat room topic and click to start chatting.


Instant messaging and group collaboration tool with thread-based channels, real-time document editing, Google Workspace integration, search, and enterprise security.


