head to head · open source
Cal.com vs Mike
Cal.com has 48,529 GitHub stars, 15,154 forks, 1,432 open issues and last shipped 4 days ago. Mike has 4,244 stars, 1,319 forks, 68 open issues and last shipped yesterday. Cal.com leads on adoption by 1,043% (48,529 vs 4,244 stars). Cal.com is written in TypeScript under MIT; Mike is written in TypeScript under AGPL-3.0. Cal.com has attracted 31% as many forks as stars, Mike 31%. Mike 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 | Mike | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 4.2K |
| License | MIT | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-14 | 2026-09-17 |
| Forks | ⑂ 15K | ⑂ 1.3K |
| 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 Mike if
- You want the Mike feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Mike 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 Mike
Mike is an open source legal AI platform for document review, drafting, and legal research. It is built as a TypeScript application with a Next.js frontend, an Express backend, Supabase Auth and Postgres, and Cloudflare R2 compatible object storage. The project sits in the legal technology and business software ecosystem and uses the GNU Affero General Public License v3.0.
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Frequently asked questions
Is Cal.com or Mike more popular?
Cal.com has 48,529 GitHub stars and Mike has 4,244. Cal.com has the larger community by that measure.
Are Cal.com and Mike free?
Both are open source. Cal.com is licensed under MIT and Mike under AGPL-3.0. Neither carries a licence fee.
What is the difference between Cal.com and Mike?
Cal.com is written in TypeScript and Mike in TypeScript. 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 Mike?
Choose Cal.com if you want the larger community (48,529 stars) or its MIT licence terms. Choose Mike if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.