Mattermost
- Website : https://about.mattermost.com/
- Dockerfile : Yes
- Android app : Yes
- iOS app : Yes
- Language : Go, React
Rocket.Chat
- Website : https://rocket.chat
- Dockerfile : Yes
- Android app : Yes
- iOS app : Yes
- Language : Node.js
Zulip
- Website : https://zulipchat.com/
- Dockerfile : No
- Android app : Yes
- iOS app : Yes
- Language : Python