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kafka vs SIP.js

kafka has 33,751 GitHub stars, 15,522 forks, 574 open issues and last shipped today. SIP.js has 2,096 stars, 728 forks, 97 open issues and last shipped 3 months ago. kafka leads on adoption by 1,510% (33,751 vs 2,096 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 35%. 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.

kafka ★ 34K SIP.js ★ 2.1K category Infrastructure & Operations

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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 2026-09-19 2026-06-15
Forks ⑂ 16K ⑂ 728
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

full kafka profile →

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

full SIP.js profile →

About kafka

Apache Kafka is an open source distributed event streaming platform, written in Java and Scala, for organizations that need high performance data pipelines, streaming analytics, data integration, and mission critical applications.

read the full kafka overview →

About SIP.js

SIP.js is an MIT licensed TypeScript library that gives web applications a JavaScript signaling stack for SIP over WebSocket, so browsers can place and receive real time audio and video sessions through WebRTC.

read the full SIP.js overview →

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Frequently asked questions

Is kafka or SIP.js more popular?

kafka has 33,751 GitHub stars and SIP.js has 2,096. 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 (33,751 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.