Rocket.Chat46.4k
Self-hosted secure team communication platform with chat, video calls and omnichannel customer support.
Mattermost39.5k
mattermost/mattermost
What is Mattermost?
Open source platform for secure team messaging and collaboration that you can run on your own server. It has 39,545 stars on GitHub and ranks #5 in Communication & Social. You can host it on your own server and keep your data.
GitHub description: Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Platforms
Top alternatives for Mattermost
Zulip26.2k
Open source team chat with topic-based threading, an alternative to Slack.
Lark CLI18k
Official command line tool for Lark/Feishu to work with messages, documents and calendars from the terminal.
OpenIM16.8k
Self-hostable open-source server that adds instant messaging and group chat to your own apps.
Element Web13.6k
Glossy web client for the Matrix network for chat and collaboration
No tools match these filters.
More Communication & Social
Mastodon50.5k
Self-hosted social network software that joins a federated, decentralized microblogging network.
Discourse48.1k
Modern open source forum software built for community discussion and long-form conversation.
Postiz41k
AI-powered social media scheduling tool that plans posts across many platforms.
Chatwoot39k
Open source live chat and omnichannel support desk, an Intercom alternative.
bitchat37.1k
Bluetooth mesh chat app that lets nearby devices message each other without internet.
ntfy35.3k
Sends push notifications to your phone or desktop with a simple HTTP PUT or POST.
Telegram Desktop33.5k
Official Telegram desktop messaging app for Windows, macOS and Linux computers.
Telegram for Android30.2k
Official Telegram messenger for Android, with its source code published for review.
No tools match these filters.