MattermostMattermost
Open sourceOpen source messaging platform for technical teams with self-hosted deployment and DevOps integrations.
Team Messaging Apps
Ranking methodology
In development — no version effective yet.
Decision archetype: communication · Scores are category-relative (P-01) and commercial relationships never affect rank (P-04).
Tools (3)
Microsoft TeamsMicrosoft
Workspace combining chat, meetings, calling, and file collaboration.
SlackSalesforce
Team messaging platform organized around channels, huddles, and workflow integrations.