head to head · open source
Cal.com vs event
Cal.com has 49,651 GitHub stars, 15,521 forks, 1,432 open issues and last shipped yesterday. event has 581 stars, 71 forks, 4 open issues and last shipped yesterday. Cal.com leads on adoption by 8,446% (49,651 vs 581 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.
← all 20902 open source comparisons
Side by side
| Cal.com | event | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 581 |
| License | MIT | MIT |
| Written in | TypeScript | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 16K | ⑂ 71 |
| 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 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
[!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 event
Event Lightweight event management, dispatch tool library implemented by Go Support for custom definition event objects Support for adding multiple listeners to an event Support setting the priority of the event listener, the higher the priority, the first to trigger Support for a set of event listeners based on the event name prefix PREFIX. . ModeSimple (default) app. event listen, trigger app.run app.end , Both will fire the app. listener New match mode: ModePath Only match a segment of characters that are not . , allowing for finer monitoring and matching matches any number of characters and can only be used…
read the full event overview →
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 event more popular?
Cal.com has 49,651 GitHub stars and event has 581. 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 (49,651 stars) or its MIT licence terms. Choose event if its feature set, stack or MIT licence fits better. Both are self-hostable.