Overview

Zulip is an open-source team chat platform designed to help teams stay productive and focused. Its unique topic-based threading model organizes every message into searchable, navigable streams and topics, making it far easier to follow multiple conversations at once than channel-based tools like Slack. Self-hostable, it gives you full control over your data while providing polished desktop, web, and mobile apps.

Key Features

• Topic-based threading: every conversation is a thread you can follow, mute, or catch up on independently
• Self-hosted: full data control on your own infrastructure
• Powerful search: full-text search across the entire history with saved filters
• Apps everywhere: desktop (Linux/macOS/Windows), web, iOS, and Android
• Integrations: native GitHub, GitLab, Slack import, Zapier, and a rich REST API with webhooks
• Video calls & screen sharing: built-in via Jitsi alongside team messaging
• Organizations & permissions: fine-grained roles, guest accounts, and moderation tools

Why Use It?

Unlike channel-based chat where unread messages pile up across everything, Zulip’s threads let you skim and reply to what matters, then switch context instantly. It shines for distributed teams, open-source communities, and anyone who wants efficient asynchronous communication without losing the feel of real-time chat.

Use Cases

• Team communication for companies and remote teams
• Open-source project community chat and support
• Self-hosted private messaging with full data ownership

Platforms

Linux · macOS · Windows · iOS · Android · Web

Licence

Open Source — Apache License 2.0 (server, web, and desktop app).

Website

zulip.com