head to head · open source
Tone.js vs appointment
Tone.js has 14,874 GitHub stars, 1,086 forks, 65 open issues and last shipped 2 days ago. appointment has 556 stars, 28 forks, 186 open issues and last shipped yesterday. Tone.js leads on adoption by 2,575% (14,874 vs 556 stars). Tone.js is written in TypeScript under MIT; appointment is written in Python under MPL-2.0. Tone.js has attracted 7% as many forks as stars, appointment 5%. appointment was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (scheduling), 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
| Tone.js | appointment | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 556 |
| License | MIT | MPL-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 1.1K | ⑂ 28 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Tone.js if
- You weight community size — 15K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick appointment if
- You want the appointment feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches Python
- You evaluated both and appointment fits your workflow better
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 →
About appointment
Thunderbird Appointment Invite others to grab times on your calendar. Choose a date. Make appointments as easy as it gets. Screenshots The bookers page for attendees and the dashboard for subscribers: Availability setup, managing bookings and general settings: Feedback and Support If you'd like to give feedback or need support, please see our Topicbox. Get started Using Docker is the recommended and for now the only supported method of building and developing Thunderbird Appointment. A detailed technical documentation of the application architecture can be found in the docs folder (still work in progress)…
read the full appointment overview →
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Frequently asked questions
Is Tone.js or appointment more popular?
Tone.js has 14,874 GitHub stars and appointment has 556. Tone.js has the larger community by that measure.
Are Tone.js and appointment free?
Both are open source. Tone.js is licensed under MIT and appointment under MPL-2.0. Neither carries a licence fee.
What is the difference between Tone.js and appointment?
Tone.js is written in TypeScript and appointment in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Tone.js or appointment?
Choose Tone.js if you want the larger community (14,874 stars) or its MIT licence terms. Choose appointment if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.