Zulip vs Cal.com
The best value in each numeric row is marked. Sponsorship has no effect on any of them.
| Criteria |
Zulip
94
81.4
=
|
Cal.com
240
55.6
=
|
|---|---|---|
| Score | 81.4 (best) | 55.6 |
| Release freshness | 83.0 (best) | 34.6 |
| Adoption signals | 73.6 | 78.1 (best) |
| Release freshness |
Updated 87 days ago
|
Stale: 249 days without a release
|
| Latest version | 12.2 · 2026-08-10 | v6.2.0 · 2026-03-01 |
| Pricing | Free | Free |
| License | Open source | Open source |
| Platforms | ||
| Self-hosted | ✓ | ✓ |
| Cloud | ✓ | ✓ |
| Web | ✓ | ✓ |
| Desktop | ✓ | - |
| Mobile | ✓ | - |
| Features | ||
| Integrations | ||
Rank receipt: Zulip
#94 overall · #2 in category
81.4/100
- Platform readiness +34.0 85.0 × 40%
- Release freshness +29.0 83.0 × 35%
- Adoption signals +18.4 73.6 × 25%
Rank receipt: Cal.com
#240 overall · #8 in category
55.6/100
- Platform readiness +24.0 60.0 × 40%
- Release freshness +12.1 34.6 × 35%
- Adoption signals +19.5 78.1 × 25%
Component values are before weighting. Read the full formula