head to head · open source
Cal.com vs apscheduler
Cal.com has 48,529 GitHub stars, 15,154 forks, 1,432 open issues and last shipped 4 days ago. apscheduler has 7,630 stars, 784 forks, 53 open issues and last shipped 8 days ago. Cal.com leads on adoption by 536% (48,529 vs 7,630 stars). Cal.com is written in TypeScript under MIT; apscheduler is written in Python under MIT. Cal.com has attracted 31% as many forks as stars, apscheduler 10%. Cal.com was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Cal.com | apscheduler | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 7.6K |
| License | MIT | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-09-14 | 2026-09-10 |
| Forks | ⑂ 15K | ⑂ 784 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Cal.com if
- You weight community size — 49K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick apscheduler if
- You want the apscheduler feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and apscheduler fits your workflow better
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 →
About apscheduler
APScheduler is an MIT licensed Python library that provides task scheduling and job queuing, scaling from a single process script to multi node deployments that share a persistent data store.
read the full apscheduler overview →
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Frequently asked questions
Is Cal.com or apscheduler more popular?
Cal.com has 48,529 GitHub stars and apscheduler has 7,630. Cal.com has the larger community by that measure.
Are Cal.com and apscheduler free?
Both are open source. Cal.com is licensed under MIT and apscheduler under MIT. Neither carries a licence fee.
What is the difference between Cal.com and apscheduler?
Cal.com is written in TypeScript and apscheduler in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Cal.com or apscheduler?
Choose Cal.com if you want the larger community (48,529 stars) or its MIT licence terms. Choose apscheduler if its feature set, stack or MIT licence fits better. Both are self-hostable.