Mostlymatter: A fork of Mattermost by Framasoft - https://news.ycombinator.com/item?id=46393817 - December 2025 (9 comments)

Mostlymatter is a fork of Mattermost without users limit - https://news.ycombinator.com/item?id=46383963 - December 2025 (4 comments)

Mattermost restricted access to old messages after 10000 limit is reached - https://news.ycombinator.com/item?id=46383675 - December 2025 (250 comments)

Here's the original announcement on v11 changes from August 2025: https://forum.mattermost.com/t/mattermost-v11-changes-in-fre...