Web Development · head to head
esbuild vs Preact
esbuild
Web Development
Extremely fast JavaScript bundler written in Go
- From
- Free
- Rated
- -
Preact
Web Development
3kB alternative to React with the same modern API
- From
- Free
- Rated
- -
The short version
- Each has a real cost: esbuild deliberately does not type-check TypeScript, only strips types, so tsc still runs separately; Preact compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
- They diverge on capability: esbuild covers Very fast builds, Preact covers 3kB runtime.
Where they differ
Only the attributes on which esbuild and Preact actually diverge.
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated), category (Web Development).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in esbuild
- Very fast builds
- TypeScript support
- Tree shaking and minification
- Simple API
Only in Preact
- 3kB runtime
- preact/compat
- Same modern API
- Fast rendering
What people use each for
The jobs each tool is most often brought in to do.
esbuild
- Build pipelines where bundle time is the bottlenecknot Preact
- Libraries and tools needing a fast, embeddable bundlernot Preact
- Replacing slower bundlers where the plugin ecosystem is not needednot Preact
Preact
- Embedded widgets that load inside someone else’s page and must stay smallnot esbuild
- Marketing and content sites where JavaScript payload affects Core Web Vitalsnot esbuild
- Applications targeting low-bandwidth or low-powered devicesnot esbuild
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
esbuild
- Deliberately does not type-check TypeScript, only strips types, so tsc still runs separately
- Plugin API is far narrower than webpack or Rollup, and complex builds hit its limits
- Code splitting support has historically lagged the more established bundlers
- Frequently used indirectly through Vite, so direct use is a narrower need than the download numbers suggest
Preact
- Compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
- Behavioural differences from React exist in edge cases, particularly around event handling
- A much smaller community, so unusual problems have fewer existing answers than React
Pricing, plan by plan
esbuild
Free- esbuildFree
- Full functionality
- Commercial use permitted
- Community support
Preact
Free- PreactFree
- Full library
- Commercial use permitted
- No usage limits
Which should you pick?
Choose esbuild if
- You need very fast builds.
- You want to start without paying.
- You work on Linux, macOS, Windows.
- You also want typescript support.
Choose Preact if
- You need 3kb runtime.
- You want to start without paying.
- You also want preact/compat.
Questions people ask
- Is esbuild or Preact better?
- Neither clearly leads. esbuild starts at Free and Preact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, esbuild or Preact?
- esbuild starts at Free and Preact at Free.
- Does esbuild or Preact run on more platforms?
- esbuild runs on Linux, macOS, Windows. Preact runs on Web.
- Can I use esbuild for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is esbuild best used for?
- esbuild is most often used for build pipelines where bundle time is the bottleneck, libraries and tools needing a fast, embeddable bundler, replacing slower bundlers where the plugin ecosystem is not needed. Of those, build pipelines where bundle time is the bottleneck and libraries and tools needing a fast, embeddable bundler are not what Preact is typically brought in for.
- What can esbuild do that Preact cannot?
- esbuild covers Very fast builds, TypeScript support, Tree shaking and minification, Simple API. Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.
Answered from the vendors’ own pages
esbuild: Is esbuild free?
Yes, open source under the MIT licence.
Preact: Is Preact free?
Yes, open source under the MIT licence.
esbuild: Does esbuild type-check TypeScript?
No. It strips types for speed and does not check them. Run tsc separately if you need type checking.
Preact: Can I use React libraries with Preact?
Most, through the preact/compat layer. Compatibility is good but not complete, so libraries relying on React internals can break.
esbuild: Do I need esbuild if I use Vite?
You already have it. Vite uses esbuild internally for dependency pre-bundling and transforms.
Preact: Why choose Preact over React?
Bundle size, almost always. If payload is not a binding constraint, React’s ecosystem is usually the better trade.
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