Rocket.Chat (https://rocket.chat) is the leading open source Slack alternative - for communities or organizations looking for the ultimate communication platform. With 14k stars on GitHub and more than 600 contributors, we are the largest and most active open source team chat community.
Rocket.Chat so much more than just another team chat. Rocket.Chat is free, unlimited and open source. Free audio and video conferencing, guest access, screen sharing, file sharing, LiveChat, LDAP Group Sync, two-factor authentication (2FA), E2E encryption, SSO and dozens of OAuth providers. Unlimited users, guests, channels, messages, searches and file uploads.
Our LiveChat enables you to add real-time chat widgets to your websites or mobile apps. Ditch other systems, save time and money by using one communication platform for team chat, support and lead nurturing.
Rocket.Chat is the only team chat service to offer cutting edge machine learning for automatic real-time message translation between users. Our user interface is offered in 37 languages, and we are constantly adding more thanks to our active open source community.
We have web, desktop (Windows, MacOS, Linux (Deb, RPM)), mobile (iOS, Android) and LiveChat clients and SDKs and dozens of supported server install methods.
Rocket.Chat is open sourced under the MIT License and comes with integrations, plugins, themes, data importers/exporters, APIs, documentation and an app marketplace (coming late 2017), giving you the freedom to customize every aspect of the platform to meet your needs .
Install Rocket.Chat on your server or desktop, use our Rocket.Chat Cloud or one of our many partnered hosting providers.