head to head · open source
kafka vs SIP.js
kafka has 34,117 GitHub stars, 15,657 forks, 574 open issues and last shipped 2 days ago. SIP.js has 2,104 stars, 724 forks, 97 open issues and last shipped 5 months ago. kafka leads on adoption by 1,522% (34,117 vs 2,104 stars). kafka is written in Java under Apache-2.0; SIP.js is written in TypeScript under MIT. kafka has attracted 46% as many forks as stars, SIP.js 34%. kafka 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
| kafka | SIP.js | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 2.1K |
| License | Apache-2.0 | MIT |
| Written in | Java | TypeScript |
| Last push | 2026-11-02 | 2026-06-15 |
| Forks | ⑂ 16K | ⑂ 724 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick kafka if
- You weight community size — 34K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick SIP.js if
- You want the SIP.js feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and SIP.js fits your workflow better
About kafka
Apache Kafka is an open source distributed event streaming platform used by thousands of companies for high performance data pipelines, streaming analytics, data integration, and mission critical applications. You need to have Java installed. We build and test Apache Kafka with Java versions 17 and 25. The release parameter in javac is set to 11 for the clients and streams modules, and 17 for the rest, ensuring compatibility with their respective minimum Java versions. Similarly, the release parameter in scalac is set to 11 for the streams modules and 17 for the rest. Scala 2.13 is the only supported version in…
read the full kafka overview →
About SIP.js
SIP Library for JavaScript Create real time peer to peer audio and video sessions via WebRTC Utilize SIP in your web application via SIP over WebSocket Send instant messages and view presence Support early media, hold and transfers Send DTMF RFC 2833 or SIP INFO Share your screen or desktop Written in TypeScript Runs in all major web browsers Compatible with standards compliant servers including Asterisk and FreeSWITCH Demo Want see it in action? The project website, sipjs.com, has a live demo. Looking for code to get started with? This repository includes demonstrations which run in a web browser. Usage To…
read the full SIP.js overview →
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Frequently asked questions
Is kafka or SIP.js more popular?
kafka has 34,117 GitHub stars and SIP.js has 2,104. kafka has the larger community by that measure.
Are kafka and SIP.js free?
Both are open source. kafka is licensed under Apache-2.0 and SIP.js under MIT. Neither carries a licence fee.
What is the difference between kafka and SIP.js?
kafka is written in Java and SIP.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, kafka or SIP.js?
Choose kafka if you want the larger community (34,117 stars) or its Apache-2.0 licence terms. Choose SIP.js if its feature set, stack or MIT licence fits better. Both are self-hostable.