Rocket.Chat is one of the largest active open source (permissive MIT source license) nodeJS communications platform communities on GitHub, featuring 1200+ global community contributors (across projects) from 30+ countries, 25,200+ GitHub stars, 5500 forks, 322+ total releases and 10,000+ 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 across modern browsers and mobile devices, comparable to Microsoft Teams and Slack. Rocket.Chat server is designed to be scalable from a family server for 10 users running on a RaspberryPi 4, to clustered configuration that can support millions 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 300k 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 host their own servers on-premises or setup on cloud. 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 websocket APIs are available to control and customize the server. Chatbot can extend the interactivity of Rocket.Chat and integrate external IT systems.

Rocket.Chat federation enables server administrators to enhance inter-organization collaboration by sharing channels across servers with full security.

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.