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Express.js vs Preact

Express.js logo

Express.js

Web Development

Fast, unopinionated, minimalist web framework for Node.js

From
Free
Rated
-
Full reviewWebsite
Preact logo

Preact

Web Development

3kB alternative to React with the same modern API

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Express.js governed by the OpenJS Foundation with no vendor or paid tier, per expressjs.com; as open source software it has no pricing to compare; Preact compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Express.js and Preact actually diverge.

Attributes where Express.js and Preact differ
AttributeExpress.jsPreact
Pricing modelopen-sourceOpen source, no licence fee

Identical on both: starting price (Free), free tier (Yes), platforms (Web), 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 Express.js

Nothing recorded that Preact does not also cover.

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.

Express.js

  • Web server and API developmentnot Preact
  • REST API creationnot Preact
  • Backend application developmentnot Preact
  • Node.js web applicationsnot Preact

Preact

  • Embedded widgets that load inside someone else’s page and must stay smallnot Express.js
  • Marketing and content sites where JavaScript payload affects Core Web Vitalsnot Express.js
  • Applications targeting low-bandwidth or low-powered devicesnot Express.js

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Express.js

  • Governed by the OpenJS Foundation with no vendor or paid tier, per expressjs.com; as open source software it has no pricing to compare
  • Express.js provides only a thin layer of fundamental routing features by its own description, requiring separate middleware modules for functionality like body parsing, sessions or authentication

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

Express.js

Free

No published plan breakdown. See the Express.js review.

Preact

Free
  • PreactFree
    • Full library
    • Commercial use permitted
    • No usage limits

Which should you pick?

Choose Express.js if

  • You want to start without paying.
Express.js review

Choose Preact if

  • You need 3kb runtime.
  • You want to start without paying.
  • You also want preact/compat.
Preact review

Questions people ask

Is Express.js or Preact better?
Neither clearly leads. Express.js 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, Express.js or Preact?
Express.js starts at Free and Preact at Free.
Does Express.js or Preact run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Express.js for free?
Both have a free tier, so you can try either at no cost before committing.
What is Express.js best used for?
Express.js is most often used for web server and api development, rest api creation, backend application development, node.js web applications. Of those, web server and api development and rest api creation are not what Preact is typically brought in for.
What can Express.js do that Preact cannot?
Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

Express.js: Is Express.js free?

Yes, Express.js is completely free and open source. The framework is maintained by the OpenJS Foundation and available via npm at no cost. Installation is as simple as running npm install express.

Source
Preact: Is Preact free?

Yes, open source under the MIT licence.

Express.js: Does Express.js offer commercial support?

Express.js itself is free with no official commercial support from the project. Community support is available through documentation and community resources at no cost. Third-party vendors may offer commercial support services, though none are listed on the official website.

Source
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.

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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