head to head · open source
Harness vs rslib
Harness has 38,798 GitHub stars, 3,451 forks, 106 open issues and last shipped yesterday. rslib has 1,043 stars, 67 forks, 30 open issues and last shipped yesterday. Harness leads on adoption by 3,620% (38,798 vs 1,043 stars). Harness is written in Go under Apache-2.0; rslib is written in TypeScript under MIT. Harness has attracted 9% as many forks as stars, rslib 6%. Harness 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
| Harness | rslib | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 1.0K |
| License | Apache-2.0 | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.5K | ⑂ 67 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Harness if
- You weight community size — 39K 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 rslib if
- You want the rslib feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and rslib fits your workflow better
About Harness
Harness Harness Open Source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, hosted development environments (Gitspaces), and artifact registries. Overview Harness Open source is an open source development platform packed with the power of code hosting, automated DevOps pipelines, Gitspaces, and artifact registries. Running Harness locally The latest publicly released docker image can be found on harness/harness. To install Harness yourself, simply run the command below. Once the container is up, you can visit in your browser. The Harness image uses a…
read the full Harness overview →
About rslib
Rslib English 简体中文 Rslib is a library development tool based on Rsbuild. It gives developers a simple way to create JavaScript libraries and UI component libraries, and provides tool integrations and best practices for building, debugging, documentation, and testing throughout library development. 🔥 Features Rslib has the following features: Easy to configure : Out of the box tooling enables developers to build libraries with zero configuration. Rslib also provides a set of semantic build configurations that can be extended as project needs grow. Performance focused : Powered by Rspack, it integrates high…
read the full rslib overview →
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Frequently asked questions
Is Harness or rslib more popular?
Harness has 38,798 GitHub stars and rslib has 1,043. Harness has the larger community by that measure.
Are Harness and rslib free?
Both are open source. Harness is licensed under Apache-2.0 and rslib under MIT. Neither carries a licence fee.
What is the difference between Harness and rslib?
Harness is written in Go and rslib 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, Harness or rslib?
Choose Harness if you want the larger community (38,798 stars) or its Apache-2.0 licence terms. Choose rslib if its feature set, stack or MIT licence fits better. Both are self-hostable.