Zulip

Free self-hosted, Cloud free for small teams, $8/user/mo Standard

About Zulip

Zulip is an open-source team chat app with a unique topic-based threading model. Every message belongs to a topic within a stream, so conversations never get tangled. Ideal for remote and async teams. Self-host for free or use Zulip Cloud.

Highlights

• ✓ Topic-based threading keeps conversations organized
• ✓ Designed for asynchronous communication
• ✓ 100+ native integrations and webhooks
• ✓ Full-text search across entire message history

Limitations

• ✗ Topic-threading model has a learning curve
• ✗ Smaller ecosystem than Slack
• ✗ UI feels more utilitarian than modern competitors

Replaces

Detailed Comparisons