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Open source team chat with first class threading.


Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conversations.

Would you recommend this product?

Zulip is built by keeping productivity in mind. Each conversation in Zulip has a topic. This allows you to take part in more than one conversation at the same time. This also make catching up on conversations efficient as compared to cSlack, Mattermost etc where you have to scroll through hundreds or thousands of messages to figure out what is going on. Zulip is the most active open source chat application in GitHub and has 350+ contributors from all across the world.


The fully threaded model of Zulip allows you to follow conversations that you care about and ignore the ones you don't.


Nothing I can think about. It's insanely great :)


Zulip chat is awesome.

It's best alternative for Slack, Mattermost, Hipchat and other group chat apps.

It has amazing search feature with lots of operators.

know more features at https://zulipchat.com/features/


Open source, chat based on topic, lots of integrations


Sorry, can't able to find.


Zulip is a great group chat, especially for communities. Whenever you come back, you can easily go through topics and streams - it's easy to narrow down to relevant conversations and just as easy to get a general view of all the messages. Each topic has it's own URL, which makes it easy to get back to a conversation. Also, search is quick and relevant.

One of the communities that uses Zulip is the Recurse Center - check out their blog post https://www.recurse.com/blog/112....


- easy to get back to any conversation thanks to natural threading

- open-source with an active community

- constantly growing


- slightly steeper learning curve as compared to other group chats, but better user experience long-term


Zulip is a fast and powerful group chat application with many unique features and more than 60 integrations. Above all it's an open source project makes it even better, as you can directly contact the developers about the issue you face, features you're missing or want to be improved and even file them at github.com/zulip/zulip/issues.



Free for open source projects

Separate Conversation Threads/topics

Great user support

Great chat search

Many integrations


Wait.... let me think....


I have been using Zulip only for three months, but I can't help wondering how I managed to get anything done without it. Everything about this chat is so thought through that I consider it essential to stay productive. Organizing all conversations into streams and topics makes it clear what each discussion is all about, so you can always mute everything that's irrelevant to you at the moment, and focus on important things. I didn't initially appreciate the full-text search, but now I regularly use it to find all the places where a particular subject was discussed. It's almost impossible to lose something with Zulip.

In addition to that, Zulip for macOS is a total eye candy. I like the minimalistic design, the colors, everything about it! I couldn't have wished for a better app. I also have Zulip for iOS, but I don't use it as much. I think it's kind of difficult to take advantage of all the great Zulip features on a small screen.


• Has all the necessary features, yet minimalistic.

• Looks fantastic.

• Open source and free for open source projects.


I can't think of anything significant.