Hall of fame
@AntimatterChat
Throwasys
inducted
SEP 2026 · for spite
spite score
🔥 10/10
free alternative to
Mattermost

“Unfortunately, after a few disappointments at a previous company actually trying (and giving up) to buy a licence, and after their latest actions, which I could only call backstabs (paywalling previously available features, putting arbitrary limits that previously didn't exist, or recently adding nag screens to push people into either buying their licence or just away from their platform altogether), I've ended up fed up with their BS and started to work on a fork.”

Throwasys, on reddit.com ↗
🧲

Antimatter

Mattermost started paywalling features it used to give away and sells the rest by the seat. Antimatter is the fork with the licence checks pulled out: SSO, LDAP, no nag screens, no invoice.

replacesMattermost Professional · $10/user/mo
self-hostedprivacyproductivityopen-sourcevibe coded
next inductee: Bilal →

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