this post was submitted on 02 Aug 2025
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Self-Hosted Alternatives to Popular Services

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Fully open source Mattermost and Rocket Chat Alternatives? (old.reddit.com)
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The original was posted on /r/selfhosted by /u/odaman8213 on 2025-08-02 13:49:06+00:00.

Now that Mattermost and RocketChat are transitioning into government first paid source available packages, with more and more features being put behind a paywall, the question comes up:

Aside from RocketChat and Mattermost - what are the best self hosted open source (like really open source, not open source as a marketing ploy) chat and colab tooling?

I know Matrix is a big one, but it seems like that can get hard to use for non-technical users - are there any others? Or is Matrix the only fully open source alternative?

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