head to head · open source
nats-server vs Hook0
nats-server has 20,989 GitHub stars, 2,025 forks, 472 open issues and last shipped yesterday. Hook0 has 1,504 stars, 104 forks, 5 open issues and last shipped yesterday. nats-server leads on adoption by 1,296% (20,989 vs 1,504 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 10% 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.
← all 20902 open source comparisons
Side by side
| nats-server | Hook0 | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 1.5K |
| License | Apache-2.0 | Custom / other |
| Written in | Go | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.0K | ⑂ 104 |
| 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 is a simple, secure and performant communications system for digital systems, services and devices. NATS is part of the Cloud Native Computing Foundation (CNCF). NATS has over 40 client language implementations, and its server can run on premise, in the cloud, at the edge, and even on a Raspberry Pi. NATS can secure and simplify design and operation of modern distributed systems. [![License][License Image]][License Url] [![Build][Build Status Image]][Build Status Url] [![Release][Release Image]][Release Url] [![Slack][Slack Image]][Slack Url] [![Coverage][Coverage Image]][Coverage Url] [![Docker…
read the full nats-server 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 →
More in Infrastructure & Operations
Related comparisons
More Messaging & Event Streaming projects
Compare either of these against the rest of the Messaging & Event Streaming field.
Frequently asked questions
Is nats-server or Hook0 more popular?
nats-server has 20,989 GitHub stars and Hook0 has 1,504. 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 (20,989 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.