Showing 12 results
Discourse
Modern community forum — trust levels, real-time, and 100+ plugins.
GPL-2.0 discussion platform with SSO, OAuth, webhooks, and custom themes. Docker deployment with automatic spam detection and moderation tools.
Rocket.Chat
Self-hosted team messaging — channels, video, and compliance.
MIT-licensed alternative to Slack and Mattermost with end-to-end encryption, Omnichannel, apps marketplace, and FedRAMP-ready compliance.
Mattermost
Secure team collaboration — messaging, playbooks, and integrations.
MIT-licensed alternative to Slack with channels, threads, webhooks, Jira/GitHub integrations, and Playbooks for incident response. Desktop and mobile apps.
Zulip
Topic-threaded team chat — keeps conversations organized at scale.
Zulip is an open-source team chat application built around topic-based threading, which keeps conversations organized in a way that channel-only tools like Slack or Rocket.Chat don't. Apache-2.0 licensed and self-hostable.
Bluesky
Decentralized social media — own your data on the AT Protocol.
MIT-licensed social app with custom feeds, algorithmic choice, and data portability. Run your own Personal Data Server or use bsky.app.
Element
Matrix-based team messaging — decentralized and end-to-end encrypted.
Element is an open-source, end-to-end encrypted collaboration client built on the decentralized Matrix protocol, so it can federate across independent servers rather than relying on one company's infrastructure. AGPL-3.0 licensed.
Fluxer
Discord-style chat for communities — messaging, voice, and video, self-hostable.
Fluxer is a free, open-source instant messaging and VoIP platform for friends, groups, and communities, styled after Discord. AGPL-3.0 licensed with self-hosting support.
Campfire
Simple self-hosted group chat from 37signals — one-time, MIT-licensed, no subscription.
Campfire is a simple, self-hosted group chat application from 37signals, released as open source under the MIT license in 2025. It's deliberately minimal — @mentions, DMs, rooms — with no recurring subscription.
Cinny
Elegant Matrix client — end-to-end encrypted, clean interface.
Cinny is an open-source Matrix client focused on a simple, elegant interface for end-to-end encrypted conversations. AGPL-3.0 licensed, it connects to any Matrix homeserver.
Stoat
Self-hostable Discord alternative (formerly Revolt) — servers, channels, voice.
Stoat (formerly Revolt) is an open-source, self-hostable group chat platform styled after Discord — servers, channels, voice, and moderation — built in the EU with no ads or data mining. Self-hosted components are AGPL-3.0 licensed.
Wire
End-to-end encrypted team collaboration — messaging, calls, EU-based.
Wire is an open-source, end-to-end encrypted collaboration platform for messaging, calls, and file sharing, aimed at organizations with strong security and compliance requirements. AGPL-3.0 licensed, based in the EU.
Quiet
Peer-to-peer team chat over Tor — no servers, no phone number, no metadata.
Quiet is an open-source, peer-to-peer team chat that syncs messages directly between devices over Tor, with no central server, no phone number, and no metadata collection. GPL-3.0 licensed.