# Cal.dyi vs Zulip

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | Cal.dyi | Zulip |
|---|---|---|
| Score | 81/100 | 82/100 ✓ |
| Rank in category | #1 of 15 in Productivity | #1 of 110 in Chat |
| GitHub stars | 49 490 ✓ | 26 134 |
| Stars, last 30 days | +861 ✓ | +191 |
| Stable releases, 12 months | 10 ✓ | 6 |
| Latest release | v6.2.0 · 1 Mar 2026 | 12.3 · 21 Sept 2026 ✓ |
| Setup | Advanced | Moderate ✓ |
| Official Docker image | Yes | Yes |
| License | MIT | Apache-2.0 |
| Main language | Typescript | Python |

## Which one should you pick?

Zulip scores 82/100 against 81/100 for Cal.dyi, so it is the safer default.

Cal.dyi ships more often: 10 stable releases in the past year, against 6 for Zulip.

If you want the quickest setup, Zulip is easier to run; Cal.dyi needs more configuration.

Cal.dyi is growing faster right now (+861 stars in 30 days).

## Details

- [Cal.dyi](https://selfhost.directory/project/cal-dyi) (markdown: https://selfhost.directory/project/cal-dyi.md)
- [Zulip](https://selfhost.directory/project/zulip) (markdown: https://selfhost.directory/project/zulip.md)

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- [Discourse vs Zulip](https://selfhost.directory/compare/discourse-vs-zulip)
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Source: https://selfhost.directory/compare/cal-dyi-vs-zulip