head to head · open source
kafka vs Hook0
kafka has 34,117 GitHub stars, 15,657 forks, 574 open issues and last shipped 2 days ago. Hook0 has 1,504 stars, 104 forks, 5 open issues and last shipped 2 days ago. kafka leads on adoption by 2,168% (34,117 vs 1,504 stars). kafka is written in Java under Apache-2.0; Hook0 is written in Rust under a custom or non-standard licence. kafka has attracted 46% as many forks as stars, Hook0 7%. 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 | Hook0 | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 1.5K |
| License | Apache-2.0 | Custom / other |
| Written in | Java | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 16K | ⑂ 104 |
| 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 Hook0 if
- You want the Hook0 feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Rust
- You evaluated both and Hook0 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 Hook0
Hook0 The open source implementation of a webhooks server and UI. Learn more » Discord · Website · Issues · Roadmap Welcome to Hook0! Sign up to hook0.com and start opening your SaaS to the web! You should check our documentation website to know what Hook0 is and what is our vision: 🐰 About Hook0 Hook0 is a real time API and App dashboard for managing webhooks. Free & open source JSON REST API Fine grained subscriptions . Enable your users to subscribe to your events by setting up a webhook. They can choose which event types they want to receive. Auto request retry . If Hook0 can't reach a webhook. Event…
read the full Hook0 overview →
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Frequently asked questions
Is kafka or Hook0 more popular?
kafka has 34,117 GitHub stars and Hook0 has 1,504. kafka has the larger community by that measure.
Are kafka and Hook0 free?
Both are open source. kafka is licensed under Apache-2.0, and Hook0 has no licence declared in this registry. Both are free to self-host.
What is the difference between kafka and Hook0?
kafka is written in Java and Hook0 in Rust. 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 Hook0?
Choose kafka if you want the larger community (34,117 stars) or its Apache-2.0 licence terms. Choose Hook0 if its feature set, stack or Custom / other licence fits better. Both are self-hostable.