head to head · open source
Cal.com vs event
Cal.com has 48,529 GitHub stars, 15,154 forks, 1,432 open issues and last shipped 4 days ago. event has 578 stars, 69 forks, 4 open issues and last shipped 2 months ago. Cal.com leads on adoption by 8,296% (48,529 vs 578 stars). Cal.com is written in TypeScript under MIT; event is written in Go under MIT. Cal.com has attracted 31% as many forks as stars, event 12%. 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 | event | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 578 |
| License | MIT | MIT |
| Written in | TypeScript | Go |
| Last push | 2026-09-14 | 2026-07-17 |
| Forks | ⑂ 15K | ⑂ 69 |
| 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 event if
- You want the event feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and event 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 event
gookit/event is a lightweight, MIT licensed event manager and dispatcher library written in Go, built for Go developers who need to register, prioritize, and fire application events inside a single process without adopting a full message broker.
read the full event overview →
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Frequently asked questions
Is Cal.com or event more popular?
Cal.com has 48,529 GitHub stars and event has 578. Cal.com has the larger community by that measure.
Are Cal.com and event free?
Both are open source. Cal.com is licensed under MIT and event under MIT. Neither carries a licence fee.
What is the difference between Cal.com and event?
Cal.com is written in TypeScript and event in Go. 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 event?
Choose Cal.com if you want the larger community (48,529 stars) or its MIT licence terms. Choose event if its feature set, stack or MIT licence fits better. Both are self-hostable.