Open Source Alternatives to Slack

Looking to replace Slack? We found 4 top open source tools that provide similar or better functionality without the vendor lock-in.

Secure team collaboration platform. Channels, threads, integrations, and playbooks.

Alt: Slack, Teams, Microsoft Teams, Cisco JabberGo

Open source team communication platform. Messages, video calls, file sharing, and omnichannel.

Alt: Slack, Teams, Discord, Pumble, Chanty, Microsoft TeamsTypeScript

Secure decentralized messenger built on Matrix. End-to-end encrypted group chat and calls.

Alt: Slack, Discord, TeamsTypeScript

Open-source team chat with topic-based threading.

Alt: Slack, Microsoft Teams, DiscordPython