head to head · open source
esbuild vs bunup
esbuild has 40,063 GitHub stars, 1,346 forks, 622 open issues and last shipped 1 months ago. bunup has 525 stars, 15 forks, 1 open issues and last shipped 3 months ago. esbuild leads on adoption by 7,531% (40,063 vs 525 stars). esbuild is written in Go under MIT; bunup is written in TypeScript under MIT. esbuild has attracted 3% as many forks as stars, bunup 3%. esbuild was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (bundler, typescript), so they are genuine substitutes rather than adjacent tools.
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 | bunup | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 525 |
| License | MIT | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-08-09 | 2026-06-17 |
| Forks | ⑂ 1.3K | ⑂ 15 |
| 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 bunup if
- You want the bunup feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and bunup 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 bunup
Bunup is an MIT licensed TypeScript and React library bundler built on Bun's native bundler, made for developers who publish packages to npm and want fast builds with minimal configuration.
read the full bunup overview →
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Frequently asked questions
Is esbuild or bunup more popular?
esbuild has 40,063 GitHub stars and bunup has 525. esbuild has the larger community by that measure.
Are esbuild and bunup free?
Both are open source. esbuild is licensed under MIT and bunup under MIT. Neither carries a licence fee.
What is the difference between esbuild and bunup?
esbuild is written in Go and bunup 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 bunup?
Choose esbuild if you want the larger community (40,063 stars) or its MIT licence terms. Choose bunup if its feature set, stack or MIT licence fits better. Both are self-hostable.