head to head · open source
Harness vs rsbuild
Harness has 38,378 GitHub stars, 3,397 forks, 106 open issues and last shipped 2 days ago. rsbuild has 3,379 stars, 281 forks, 22 open issues and last shipped yesterday. Harness leads on adoption by 1,036% (38,378 vs 3,379 stars). Harness is written in Go under Apache-2.0; rsbuild is written in TypeScript under MIT. Harness has attracted 9% as many forks as stars, rsbuild 8%. rsbuild 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 | rsbuild | |
|---|---|---|
| GitHub stars | ★ 38K | ★ 3.4K |
| License | Apache-2.0 | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 3.4K | ⑂ 281 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Harness if
- You weight community size — 38K 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 rsbuild if
- You want the rsbuild feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and rsbuild fits your workflow better
About Harness
Harness Open Source is an Apache 2.0, Go based developer platform that combines Git source control management, CI/CD pipelines, Gitspaces hosted development environments and artifact registries into one self hostable system for engineering teams that want end to end software delivery without stitching four separate products together.
read the full Harness overview →
About rsbuild
Rsbuild is a build tool for web applications. It lives in the JavaScript and TypeScript frontend ecosystem. It is in the Developer Tools / Build & Deployment category. The repository lists TypeScript and an MIT license. It is part of Rstack, a unified JavaScript toolchain. It is powered by Rspack, and it uses Rust based tools such as SWC and Lightning CSS.
read the full rsbuild overview →
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Frequently asked questions
Is Harness or rsbuild more popular?
Harness has 38,378 GitHub stars and rsbuild has 3,379. Harness has the larger community by that measure.
Are Harness and rsbuild free?
Both are open source. Harness is licensed under Apache-2.0 and rsbuild under MIT. Neither carries a licence fee.
What is the difference between Harness and rsbuild?
Harness is written in Go and rsbuild 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 rsbuild?
Choose Harness if you want the larger community (38,378 stars) or its Apache-2.0 licence terms. Choose rsbuild if its feature set, stack or MIT licence fits better. Both are self-hostable.