Zulip - Chat for Distributed Teams
Zulip combines the immediacy of real-time chat with an email threading model.
Image by Zulip
Zulip combines the immediacy of real-time chat with an email threading model. It is Free is free for an unlimited number of users.
Zulip provides the benefits of real-time chat, while also being great at asynchronous communication. Zulip is inspired by email’s highly effective threading model: Every channel message has a topic, just like every message in email has a subject line.
Topics hold Zulip conversations together, just like subject lines hold email conversations together. They allow you to efficiently catch up on messages and reply in context, even to conversations that started hours or days ago.
Zulip is 100% open source software, built by a vibrant community of over 700 developers from all around the world. With 160,000 words of developer documentation, a high quality code base, and a welcoming community, it’s easy to extend or tweak Zulip.