head to head · open source
esbuild vs penguin-harness
esbuild has 40,063 GitHub stars, 1,346 forks, 622 open issues and last shipped 1 months ago. penguin-harness has 2,305 stars, 245 forks, 77 open issues and last shipped today. esbuild leads on adoption by 1,638% (40,063 vs 2,305 stars). esbuild is written in Go under MIT; penguin-harness is written in TypeScript under Apache-2.0. esbuild has attracted 3% as many forks as stars, penguin-harness 11%. penguin-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
| esbuild | penguin-harness | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 2.3K |
| License | MIT | Apache-2.0 |
| Written in | Go | TypeScript |
| Last push | 2026-08-09 | 2026-09-20 |
| Forks | ⑂ 1.3K | ⑂ 245 |
| 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 penguin-harness if
- You want the penguin-harness feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and penguin-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 penguin-harness
PenguinHarness is an open source, local first, multi agent auto development platform that runs on a developer's own computer or server and automates the full lifecycle of AI agent applications — creation, evaluation, optimization, and deployment — under the Apache 2.0 licence.
read the full penguin-harness overview →
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Frequently asked questions
Is esbuild or penguin-harness more popular?
esbuild has 40,063 GitHub stars and penguin-harness has 2,305. esbuild has the larger community by that measure.
Are esbuild and penguin-harness free?
Both are open source. esbuild is licensed under MIT and penguin-harness under Apache-2.0. Neither carries a licence fee.
What is the difference between esbuild and penguin-harness?
esbuild is written in Go and penguin-harness 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, esbuild or penguin-harness?
Choose esbuild if you want the larger community (40,063 stars) or its MIT licence terms. Choose penguin-harness if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.