head to head · open source
Cal.com vs Mike
Cal.com has 49,651 GitHub stars, 15,521 forks, 1,432 open issues and last shipped yesterday. Mike has 4,413 stars, 1,372 forks, 68 open issues and last shipped 2 days ago. Cal.com leads on adoption by 1,025% (49,651 vs 4,413 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%. 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.
← all 20902 open source comparisons
Side by side
| Cal.com | Mike | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 4.4K |
| License | MIT | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-11-01 |
| Forks | ⑂ 16K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Cal.com if
- You weight community size — 50K 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
[!WARNING] Use at your own risk. Cal.diy is the open source community edition of Cal.com and it is intended for users who want to self host their own Cal.diy instance. It is strictly recommended for personal, non production use. Please review all installation and configuration steps carefully. Self hosting requires advanced knowledge of server administration, database management, and securing sensitive data. Proceed only if you are comfortable with these responsibilities. [!TIP] For any commercial and enterprise ready scheduling infrastructure, use Cal.com, not Cal.diy; hosted by us or get invited to on prem…
read the full Cal.com overview →
About Mike
Mike Mike (MikeOSS) is an open source legal AI platform for document review, drafting, and legal research. It combines a Next.js frontend, an Express backend, Supabase Auth/Postgres, and Cloudflare R2 compatible object storage. Website: mikeoss.com Features Chat with legal documents and open matters Review documents and apply suggested edits Run reusable assistant and tabular review workflows Organize projects, folders, and a document library Verify citations and research US case law with CourtListener Work from Microsoft Word with the beta task pane add in Run supported language models locally through Ollama…
More in Business Software
Related comparisons
More Scheduling & Event Management projects
Compare either of these against the rest of the Scheduling & Event Management field.
Frequently asked questions
Is Cal.com or Mike more popular?
Cal.com has 49,651 GitHub stars and Mike has 4,413. 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 (49,651 stars) or its MIT licence terms. Choose Mike if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.