head to head · open source
Cal.com vs Tone.js
Cal.com has 49,651 GitHub stars, 15,521 forks, 1,432 open issues and last shipped yesterday. Tone.js has 14,874 stars, 1,086 forks, 65 open issues and last shipped 2 days ago. Cal.com leads on adoption by 234% (49,651 vs 14,874 stars). Cal.com is written in TypeScript under MIT; Tone.js is written in TypeScript under MIT. Cal.com has attracted 31% as many forks as stars, Tone.js 7%. 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 | Tone.js | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 15K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-11-01 |
| Forks | ⑂ 16K | ⑂ 1.1K |
| 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 Tone.js if
- You want the Tone.js feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Tone.js 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 Tone.js
Tone.js Tone.js is a Web Audio framework for creating interactive music in the browser. The architecture of Tone.js aims to be familiar to both musicians and audio programmers creating web based audio applications. On the high level, Tone offers common DAW (digital audio workstation) features like a global transport for synchronizing and scheduling events as well as prebuilt synths and effects. Additionally, Tone provides high performance building blocks to create your own synthesizers, effects, and complex control signals. API Examples Installation There are two ways to incorporate Tone.js into a project…
read the full Tone.js overview →
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Frequently asked questions
Is Cal.com or Tone.js more popular?
Cal.com has 49,651 GitHub stars and Tone.js has 14,874. Cal.com has the larger community by that measure.
Are Cal.com and Tone.js free?
Both are open source. Cal.com is licensed under MIT and Tone.js under MIT. Neither carries a licence fee.
What is the difference between Cal.com and Tone.js?
Cal.com is written in TypeScript and Tone.js 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 Tone.js?
Choose Cal.com if you want the larger community (49,651 stars) or its MIT licence terms. Choose Tone.js if its feature set, stack or MIT licence fits better. Both are self-hostable.