head to head · open source
esbuild vs penguin-harness
esbuild has 40,120 GitHub stars, 1,368 forks, 622 open issues and last shipped 3 months ago. penguin-harness has 3,140 stars, 337 forks, 77 open issues and last shipped yesterday. esbuild leads on adoption by 1,178% (40,120 vs 3,140 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 | ★ 3.1K |
| License | MIT | Apache-2.0 |
| Written in | Go | TypeScript |
| Last push | 2026-08-09 | 2026-11-04 |
| Forks | ⑂ 1.4K | ⑂ 337 |
| 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
Website Getting started Documentation Plugins FAQ Why? Our current build tools for the web are 10 100x slower than they could be: The main goal of the esbuild bundler project is to bring about a new era of build tool performance, and create an easy to use modern bundler along the way. Major features: Extreme speed without needing a cache JavaScript, CSS, TypeScript, and JSX built in A straightforward API for CLI, JS, and Go Bundles ESM and CommonJS modules Bundles CSS including CSS modules Tree shaking, minification, and source maps Local server, watch mode, and plugins Check out the getting started instructions…
read the full esbuild overview →
About penguin-harness
PenguinHarness Open source, local first multi agent app development platform Fully automate building · optimizing · deploying AI applications 1000+ Models · Multi Platform · Apache 2.0 · Agent Self Evolution = 24" / English 简体中文 Why PenguinHarness With LangChain, you build agents by hand — at 1× speed. With PenguinHarness, agents build agents — at 100×. PenguinHarness runs on your computer or server and automates the agent app lifecycle from creation and evaluation to optimization and deployment. Three reasons define the platform: 1. 🏆 Outstanding results at tens of times less cost A deliberately minimal…
read the full penguin-harness overview →
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Frequently asked questions
Is esbuild or penguin-harness more popular?
esbuild has 40,120 GitHub stars and penguin-harness has 3,140. 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 (40,120 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.