Mattermost
mattermost.com
Open-source, self-hosted team messaging for security-conscious teams.
Where Mattermost is listed
Nobody has paid for any of these positions — they are unpaid picks by xAlternative, and any of them can be bought.
Unpaid — our pick, and a position anyone can claim
Mattermost is not funding any migrations on xAlternative yet. A position on any of these boards starts at the board it would sit on, and comes with saying what a switcher gets.