head to head · open source
Cal.com vs Hi.Events
Cal.com has 48,529 GitHub stars, 15,154 forks, 1,432 open issues and last shipped 4 days ago. Hi.Events has 4,022 stars, 723 forks, 193 open issues and last shipped 2 days ago. Cal.com leads on adoption by 1,107% (48,529 vs 4,022 stars). Cal.com is written in TypeScript under MIT; Hi.Events is written in PHP under a custom or non-standard licence. Cal.com has attracted 31% as many forks as stars, Hi.Events 18%. Hi.Events was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (open-source), so they are genuine substitutes rather than adjacent tools.
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 | Hi.Events | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 4.0K |
| License | MIT | Custom / other |
| Written in | TypeScript | PHP |
| Last push | 2026-09-14 | 2026-09-16 |
| Forks | ⑂ 15K | ⑂ 723 |
| 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 Hi.Events if
- You want the Hi.Events feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches PHP
- You evaluated both and Hi.Events 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 Hi.Events
Hi.Events is an open source event management and ticket selling platform built with Laravel, PHP, React, TypeScript, PostgreSQL, Redis, and Docker. It lives in the PHP and Laravel open source ecosystem.
read the full Hi.Events overview →
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Frequently asked questions
Is Cal.com or Hi.Events more popular?
Cal.com has 48,529 GitHub stars and Hi.Events has 4,022. Cal.com has the larger community by that measure.
Are Cal.com and Hi.Events free?
Both are open source. Cal.com is licensed under MIT, and Hi.Events has no licence declared in this registry. Both are free to self-host.
What is the difference between Cal.com and Hi.Events?
Cal.com is written in TypeScript and Hi.Events in PHP. 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 Hi.Events?
Choose Cal.com if you want the larger community (48,529 stars) or its MIT licence terms. Choose Hi.Events if its feature set, stack or Custom / other licence fits better. Both are self-hostable.