head to head · open source
Harness vs lightningcss
Harness has 38,378 GitHub stars, 3,397 forks, 106 open issues and last shipped 2 days ago. lightningcss has 7,677 stars, 301 forks, 428 open issues and last shipped 8 days ago. Harness leads on adoption by 400% (38,378 vs 7,677 stars). Harness is written in Go under Apache-2.0; lightningcss is written in Rust under MPL-2.0. Harness has attracted 9% as many forks as stars, lightningcss 4%. 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 | lightningcss | |
|---|---|---|
| GitHub stars | ★ 38K | ★ 7.7K |
| License | Apache-2.0 | MPL-2.0 |
| Written in | Go | Rust |
| Last push | 2026-09-16 | 2026-09-10 |
| Forks | ⑂ 3.4K | ⑂ 301 |
| 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 lightningcss if
- You want the lightningcss feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches Rust
- You evaluated both and lightningcss 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 lightningcss
Lightning CSS is an extremely fast CSS parser, transformer, bundler, and minifier written in Rust, built for front end developers and build tool authors who need to parse, lower, prefix, and minify CSS.
read the full lightningcss overview →
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Frequently asked questions
Is Harness or lightningcss more popular?
Harness has 38,378 GitHub stars and lightningcss has 7,677. Harness has the larger community by that measure.
Are Harness and lightningcss free?
Both are open source. Harness is licensed under Apache-2.0 and lightningcss under MPL-2.0. Neither carries a licence fee.
What is the difference between Harness and lightningcss?
Harness is written in Go and lightningcss 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 lightningcss?
Choose Harness if you want the larger community (38,378 stars) or its Apache-2.0 licence terms. Choose lightningcss if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.