head to head · open source
nats-server vs Hook0
nats-server has 20,745 GitHub stars, 1,962 forks, 472 open issues and last shipped yesterday. Hook0 has 1,486 stars, 103 forks, 5 open issues and last shipped 3 days ago. nats-server leads on adoption by 1,296% (20,745 vs 1,486 stars). nats-server is written in Go under Apache-2.0; Hook0 is written in Rust under a custom or non-standard licence. nats-server has attracted 9% as many forks as stars, Hook0 7%. nats-server 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
| nats-server | Hook0 | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 1.5K |
| License | Apache-2.0 | Custom / other |
| Written in | Go | Rust |
| Last push | 2026-09-18 | 2026-09-16 |
| Forks | ⑂ 2.0K | ⑂ 103 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nats-server if
- You weight community size — 21K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- 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 nats-server
nats server is the Go based, Apache 2.0 licensed server at the heart of NATS, a simple, secure and performant communications system for digital systems, services and devices, aimed at teams building distributed systems, microservices, and cloud, edge or connected vehicle deployments that need messaging without running heavyweight broker infrastructure.
read the full nats-server overview →
About Hook0
Hook0 is an open source Rust webhook server and dashboard in the Rust infrastructure and event streaming ecosystem. The GitHub description says it helps teams provide webhooks, and the README presents it as a real time API and dashboard for managing webhooks. Its purpose is to make webhook delivery part of a product without a separate delivery layer.
read the full Hook0 overview →
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Frequently asked questions
Is nats-server or Hook0 more popular?
nats-server has 20,745 GitHub stars and Hook0 has 1,486. nats-server has the larger community by that measure.
Are nats-server and Hook0 free?
Both are open source. nats-server 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 nats-server and Hook0?
nats-server is written in Go 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, nats-server or Hook0?
Choose nats-server if you want the larger community (20,745 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.