head to head · open source
Harness vs rspack
Harness has 38,785 GitHub stars, 3,451 forks, 106 open issues and last shipped 4 days ago. rspack has 12,967 stars, 877 forks, 224 open issues and last shipped yesterday. Harness leads on adoption by 199% (38,785 vs 12,967 stars). Harness is written in Go under Apache-2.0; rspack is written in Rust under MIT. Harness has attracted 9% as many forks as stars, rspack 7%. rspack 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 | rspack | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 13K |
| License | Apache-2.0 | MIT |
| Written in | Go | Rust |
| Last push | 2026-10-30 | 2026-11-02 |
| Forks | ⑂ 3.5K | ⑂ 877 |
| 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 rspack if
- You want the rspack feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and rspack 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 rspack
Rspack English 简体中文 Rspack is a fast Rust based bundler for the web. It modernizes the webpack API to enable seamless replacement of webpack while delivering lightning fast build speeds. ✨ Features 🚀 Fast Startup : Based on Rust, the build speed is extremely fast, bringing you the ultimate development experience. ⚡ Lightning HMR : With a built in incremental compilation mechanism, HMR is extremely fast and fully capable of developing large scale projects. 📦 Webpack Compatible : Compatible with plugins and loaders in the webpack ecosystem, seamlessly integrating excellent libraries built by the community. 🎨…
read the full rspack overview →
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Frequently asked questions
Is Harness or rspack more popular?
Harness has 38,785 GitHub stars and rspack has 12,967. Harness has the larger community by that measure.
Are Harness and rspack free?
Both are open source. Harness is licensed under Apache-2.0 and rspack under MIT. Neither carries a licence fee.
What is the difference between Harness and rspack?
Harness is written in Go and rspack 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, Harness or rspack?
Choose Harness if you want the larger community (38,785 stars) or its Apache-2.0 licence terms. Choose rspack if its feature set, stack or MIT licence fits better. Both are self-hostable.