Zulip

medium
Communication

Threaded team chat that combines real-time messaging with email-like topic threading.

2 GB RAM min Docker required Active development iOS & Android
GitHub Docs Website

Replaces

Slack

Pros

  • Unique topic-based threading model
  • Great for async communication
  • Fully open source with no paid tiers for self-hosted
  • Excellent search

Cons

  • Threading model has a learning curve
  • Fewer integrations than Slack
  • Smaller community
  • UI feels dated compared to alternatives

Tags

messagingteam-chatthreadedtopics

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