head to head · open source
Harness vs lightningcss
Harness has 38,798 GitHub stars, 3,451 forks, 106 open issues and last shipped yesterday. lightningcss has 7,722 stars, 323 forks, 428 open issues and last shipped 3 days ago. Harness leads on adoption by 402% (38,798 vs 7,722 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.
← all 20902 open source comparisons
Side by side
| Harness | lightningcss | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 7.7K |
| License | Apache-2.0 | MPL-2.0 |
| Written in | Go | Rust |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 3.5K | ⑂ 323 |
| 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 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 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 lightningcss
⚡️ Lightning CSS An extremely fast CSS parser, transformer, and minifier written in Rust. Use it with Parcel, as a standalone library or CLI, or via a plugin with any other tool. Features Extremely fast – Parsing and minifying large files is completed in milliseconds, often with significantly smaller output than other tools. See benchmarks below. Typed property values – many other CSS parsers treat property values as an untyped series of tokens. This means that each transformer that wants to do something with these values must interpret them itself, leading to duplicate work and inconsistencies. Lightning CSS…
read the full lightningcss overview →
More in Developer Tools
Related comparisons
More Build & Deployment projects
Compare either of these against the rest of the Build & Deployment field.
Frequently asked questions
Is Harness or lightningcss more popular?
Harness has 38,798 GitHub stars and lightningcss has 7,722. 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 (38,798 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.