head to head
Calendly vs Cal.com
Cal.com is the open source alternative to Calendly — scheduling and meeting booking. Here is the honest comparison.
Yes — Cal.com is a viable free replacement for Calendly. Cal.com is open source under MIT, written in TypeScript, with 49,651 GitHub stars, 15,521 forks and 1,432 open issues; it was last pushed 15 hours ago. Calendly costs from $10, while self-hosting Cal.com carries no licence fee — the trade is your operational time instead of a subscription. 1 other open source Calendly alternative is tracked here, led by Rallly at 5,337 stars. Cal.com ranks #1 of 2 tracked open source Calendly alternatives by stars. The tracked set, by adoption: Rallly (5,337 stars). Replacement criteria on this page: 4 reasons to move to Cal.com and 3 reasons to stay on Calendly.
choose Cal.com if
- Your Calendly bill is growing with seats or usage
- You need your data in a format and server you control
- Your compliance posture requires auditing the code that touches sensitive data
- You have (or can rent) a server and basic Docker comfort
stick with Calendly if
- You need the polished onboarding and support SLAs of a commercial vendor
- Your team has zero capacity to operate software, even self-hosted-simple
- You depend on a Calendly integration ecosystem that the OSS alternatives have not replicated
Side by side
| Cal.com (open source) | Calendly | |
|---|---|---|
| Price | Free (self-hosted) | Free / $10-15/seat/month |
| License | MIT | Proprietary |
| Source code | Public, auditable | Closed |
| Self-hosting | Yes — calcom/cal.diy | Cloud only |
| Data ownership | Your server, your format | Vendor's cloud |
| Community | ★ 50K · ⑂ 16K | — |
| Built with | TypeScript | — |
Why people look for a Calendly alternative
About Cal.com
Cal.diy is a fully open source, community maintained fork of Cal.com, stripped of all enterprise and commercial features. It provides a self hosted scheduling platform built on the T3 stack (Next.js, tRPC, Prisma, Tailwind CSS, Zod), licensed under MIT with no proprietary code or license keys required.
read the full Cal.com overview →
Other open source alternatives to Calendly
last updated nightly · ranking method: github stars, live-tracked
Frequently asked questions
Is Cal.com a good replacement for Calendly?
Cal.com is an open source alternative to Calendly (Scheduling and meeting booking). It is written in TypeScript and licensed under MIT, with 49,651 GitHub stars.
Is Cal.com free compared to Calendly?
Yes. Cal.com is open source — there is no licence fee, and you can self-host it. Calendly is typically a paid subscription, so the trade-off is licence cost against the operational work of running it yourself.
How do I migrate from Calendly to Cal.com?
Migration effort depends on the data formats involved. Check Cal.com's documentation for import options, and compare the feature table above to confirm the capabilities you depend on are covered before switching.