This comes straight from Zulip’s own GitHub page, and it’s free. Need help installing?
About this app
Zulip is team and community chat with one big difference: every message belongs to a named topic inside a channel. Instead of scrolling back through one endless stream to work out what people were talking about, you open the topic you care about and read it start to finish.
This is the official Zulip app, built with Flutter. It became the main Zulip mobile app in June 2025, replacing the older one.
You will need an account on a Zulip server: your workplace's, an open-source project's, or one on zulip.com. The app connects to it; it is not a chat service of its own.
From the app’s home page
- See the codeHow it’s made, every line is public
- WebsiteThe app’s own home page
- Questions & commentsTalk with the people who make it
- Report a problemTell the makers something is broken
- All versionsOlder downloads and what changed
- LicenseThe rules for using and sharing it
More like this
Rocket.Chat
Team chat for the Rocket.Chat server you use
Mattermost
Team chat that runs on your own server
Stoat
Community chat servers, channels and friends
Telegram
Chat, call and send big files to anyone
BitChat
Chat over Bluetooth when there is no internet
Nekogram
Telegram with a tidier screen and a translator