Mattermost is by-design centralized but it’s self-hostable & AGPL so I’m not sure where the closed-source accusation is coming from.
The AGPL community edition of Mattermost lacks several crucial features for anything but very small private communities. It isn’t closed source per se, but very much open-core.
I didn’t say it was good or perfect :P …I’ve also never administered it, but I know those that do self-host it. Open core isn’t the worst. Self-hosted GitLab’s aren’t my favorite, but I certainly prefer it to the Microsoft-owned alternative (that includes have to create an account too! *shock*).
The AGPL community edition of Mattermost lacks several crucial features for anything but very small private communities. It isn’t closed source per se, but very much open-core.
I didn’t say it was good or perfect :P …I’ve also never administered it, but I know those that do self-host it. Open core isn’t the worst. Self-hosted GitLab’s aren’t my favorite, but I certainly prefer it to the Microsoft-owned alternative (that includes have to create an account too! *shock*).