Rocket.Chat is one of the largest active open source (permissive MIT source license) nodeJS communications platform communities on GitHub, featuring 700+ global community contributors (across projects) from 30+ countries, 21000+ GitHub stars, 4600 forks, 242+ total releases and 8,500+ issues since inception in 2015.

Rocket.Chat is a modern team chat and collaborating platform written in full-stack JavaScript. Rocket.Chat offers a full featured rich team chat experience on modern browsers, comparable to Slack and Microsoft Teams. Mobile and desktop clients run on iOS, Android, MacOSX, Windows, and Linux. Rocket.Chat server is designed to be scalable from a small family messaging server for 5 users running on a Raspberry Pi 3, to clustered configuration that can support tens of thousands of users. On-premise deployment of Rocket.Chat can ensure 100% complete security and privacy of your valuable communications/data.

Rocket.Chat is now installed on over 180k servers and counts over 10m users worldwide. Rocket.Chat’s long-term vision is to replace email with a real-time federated communications platform globally.

Users can set up Rocket.Chat on cloud or by hosting their own servers on-premises. Thanks to its liberal MIT open source license, Rocket.Chat can be also be forked on Github and becomes a new platform/product altogether.

Rocket.Chat has been designed to be totally extensible. Rocket.Chat Apps is a straightforward way to add features to Rocket.Chat. REST and realtime (websocket) APIs are available to control and customize various aspects of the server. Chatbot can extend the interactivity of Rocket.Chat and integrate external IT systems.

Rocket.Chat has won multiple prizes such as a 2016 Bossie Award for Best Open Source Application and first prize in the 2017 edition of All Things Open’s Startup Competition.

Rocket.Chat supports over 59 local languages. Rocket.Chat's community interacts 24 x 7 at the community Rocket.Chat server since inception in 2015.