Mattermost
Open-source team chat alternative built for self-hosting.
Quick facts
- Category
- Chat & Messaging
- Pricing
- open-source
- Website
- mattermost.com
- Status
- live
- Listed
- 2026-05-19
- Last verified
- 2026-05-19
Description
Mattermost is an open-source team chat platform you can deploy on your own servers, making it a practical alternative to Slack for organizations that need to keep data in-house. You get channels, direct messages, integrations, and mobile apps without vendor lock-in, and you control the whole infrastructure yourself.
Alternatives
All alternatives to Mattermost →Twist
Asynchronous team messaging organised by threads.
Element
Decentralised Matrix-based messenger for secure team chat.
Google Chat
Team messaging integrated with Google Workspace.
Rocket.Chat
Open-source communication platform with chat and channels.
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