5 Best Open-Source Rocket.Chat Alternatives (2026)

Rocket.Chat: open-source team communication platform that can be self-hosted. Of the 10 alternatives we track, 5 match the "Open source" filter. Mattermost is the closest match, sharing 100% of Rocket.Chat's tracked attributes. Every option links to its own alternatives, so you can keep exploring.

Last reviewed October 19, 2026 · 5 alternatives