Mattermost team here, You guessed it, Mattermost is the 3rd version of what started as a portal/community site for our players (first version was forum-like, t

Mattermost team here, You guessed it, Mattermost is the 3rd version of what started as a portal/community site for our players (first version was forum-like, the second was Facebook-like, Mattermost is now HipChat/Slack-like).