### Mattermost
* Website : https://about.mattermost.com/
* Dockerfile : Yes
* Android app : [Yes](https://play.google.com/store/apps/details?id=com.mattermost.rn)
* iOS app : [Yes](https://itunes.apple.com/us/app/mattermost/id1257222717?mt=8)
* Language : Go, React

### Rocket.Chat
Website : https://rocket.chat
Dockerfile : Yes
Android app : [Yes](https://play.google.com/store/apps/details?id=chat.rocket.android)
iOS app : [Yes](https://itunes.apple.com/app/rocket-chat/id1148741252)
Language : Node.js

### Zulip
* Website : https://zulipchat.com/
* Dockerfile : No
* Android app : [Yes](https://play.google.com/store/apps/details?id=com.zulipmobile)
* iOS app : [Yes](https://itunes.apple.com/us/app/zulip/id1203036395)
* Language : Python