Chatto vs Zulip
Comparing two open source alternatives to Slack and Discord . Use the comparison below to decide which one fits your needs.
Chatto
AGPL-3.0A self-hosted chat application for teams and communities with video calls, voice calls, and screen sharing.
Zulip
Apache-2.0Open-source team chat with a unique topic-based threading model that makes it easy to follow multiple conversations.
Side-by-side comparison
| Chatto | Zulip | |
|---|---|---|
| License | AGPL-3.0 | Apache-2.0 |
| Self-hostable | Yes | Yes |
| GitHub Stars | 2,638 | 25,753 |
| Forks | 117 | 10,106 |
| Open Issues | 208 | 2,058 |
| Last Commit | Aug 22, 2026 | Aug 21, 2026 |
| First Released | Apr 8, 2026 | Sep 25, 2015 |
| Categories | ||
| Tags |
GitHub stars over time
GitHub stars over time
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