Cal.diy (Cal.com community edition)
98 · HealthyMIT-licensed community fork of Cal.com with booking pages and calendar integrations; enterprise features removed.
Open source alternatives to Calendly
2 open source projects replace Calendly, ranked by how safe each is to depend on.
Easy!Appointments
69 · StableAppointment booking app for service businesses, with Google Calendar sync.
Easy!Appointments
69 · StableAt a glance
Health and license are separate verdicts: a project can be well maintained and still not be open source.
| Project | Health | License | Stars |
|---|---|---|---|
| Cal.diy (Cal.com community edition) | 98 · Healthy | Free to useMIT | 49k |
| Easy!Appointments | 69 · Stable | Free, share changesGPL-3.0 | 4.4k |
More in Scheduling
Calendly is a paid scheduling product. See all open source scheduling tools, ranked the same way.
Scores last refreshed from GitHub on 9 October 2026. How we score.