head to head · open source
esbuild vs Harness
esbuild has 40,061 GitHub stars, 1,346 forks, 622 open issues and last shipped 1 months ago. Harness has 38,391 stars, 3,398 forks, 106 open issues and last shipped 2 days ago. esbuild leads on adoption by 4% (40,061 vs 38,391 stars). esbuild is written in Go under MIT; Harness is written in Go under Apache-2.0. esbuild has attracted 3% as many forks as stars, Harness 9%. 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 15422 open source comparisons
Side by side
| esbuild | Harness | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 38K |
| License | MIT | Apache-2.0 |
| Written in | Go | Go |
| Last push | 2026-08-09 | 2026-09-17 |
| Forks | ⑂ 1.3K | ⑂ 3.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick esbuild if
- You weight community size — 40K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Harness if
- You want the Harness feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and Harness fits your workflow better
About esbuild
esbuild is an MIT licensed, Go based bundler for the web that compiles JavaScript, CSS, TypeScript, and JSX in one tool, aimed at front end developers and teams whose current web build pipelines are slower than they need to be.
read the full esbuild overview →
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 →
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 esbuild or Harness more popular?
esbuild has 40,061 GitHub stars and Harness has 38,391. esbuild has the larger community by that measure.
Are esbuild and Harness free?
Both are open source. esbuild is licensed under MIT and Harness under Apache-2.0. Neither carries a licence fee.
What is the difference between esbuild and Harness?
esbuild is written in Go and Harness in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, esbuild or Harness?
Choose esbuild if you want the larger community (40,061 stars) or its MIT licence terms. Choose Harness if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.