head to head · open source
ECC vs Fonoster
ECC has 263,046 GitHub stars, 39,368 forks, 204 open issues and last shipped today. Fonoster has 8,114 stars, 556 forks, 22 open issues and last shipped 2 days ago. ECC leads on adoption by 3,142% (263,046 vs 8,114 stars). ECC is written in JavaScript under MIT; Fonoster is written in TypeScript under MIT. ECC has attracted 15% as many forks as stars, Fonoster 7%. ECC 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
| ECC | Fonoster | |
|---|---|---|
| GitHub stars | ★ 263K | ★ 8.1K |
| License | MIT | MIT |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 39K | ⑂ 556 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ECC if
- You weight community size — 263K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick Fonoster if
- You want the Fonoster feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Fonoster fits your workflow better
About ECC
ECC is an MIT licensed open source agent harness performance optimization system that gives AI coding agents a coordinated engineering workflow — plan, test, implement, review, verify, remember, improve — for developers working in Claude Code, Codex, OpenCode, Cursor, and other harnesses.
About Fonoster
Fonoster is an MIT licensed TypeScript platform for programmable voice and telephony that is positioned as the open source alternative to Twilio, and it is aimed at developers and platform teams building cloud communications, voice applications and customer engagement products.
read the full Fonoster overview →
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Frequently asked questions
Is ECC or Fonoster more popular?
ECC has 263,046 GitHub stars and Fonoster has 8,114. ECC has the larger community by that measure.
Are ECC and Fonoster free?
Both are open source. ECC is licensed under MIT and Fonoster under MIT. Neither carries a licence fee.
What is the difference between ECC and Fonoster?
ECC is written in JavaScript and Fonoster 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, ECC or Fonoster?
Choose ECC if you want the larger community (263,046 stars) or its MIT licence terms. Choose Fonoster if its feature set, stack or MIT licence fits better. Both are self-hostable.