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Preact vs Svelte

Preact logo

Preact

Web Development

3kB alternative to React with the same modern API

From
Free
Rated
-
Full reviewWebsite
Svelte logo

Svelte

Web Development

A love letter to web development

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Preact compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose; Svelte licensed under the MIT License per svelte.dev; as open source software it has no paid tier or vendor price to compare
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Preact and Svelte actually diverge.

Attributes where Preact and Svelte differ
AttributePreactSvelte
Pricing modelOpen source, no licence feeopen-source

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 Preact

  • 3kB runtime
  • preact/compat
  • Same modern API
  • Fast rendering

Only in Svelte

Nothing recorded that Preact does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Preact

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

Svelte

  • Frontend web application developmentnot Preact

Where each one falls short

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

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

Svelte

  • Licensed under the MIT License per svelte.dev; as open source software it has no paid tier or vendor price to compare
  • Svelte is a compiler rather than a runtime library by design, per svelte.dev, so components must be compiled ahead of time and cannot be interpreted directly in the browser without a build step

Pricing, plan by plan

Preact

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

Svelte

Free

No published plan breakdown. See the Svelte review.

Which should you pick?

Choose Preact if

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

Choose Svelte if

  • You want to start without paying.
Svelte review

Questions people ask

Is Preact or Svelte better?
Neither clearly leads. Preact starts at Free and Svelte at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Preact or Svelte?
Preact starts at Free and Svelte at Free.
Does Preact or Svelte run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Preact for free?
Both have a free tier, so you can try either at no cost before committing.
What is Preact best used for?
Preact is most often used for embedded widgets that load inside someone else’s page and must stay small, marketing and content sites where javascript payload affects core web vitals, applications targeting low-bandwidth or low-powered devices. Of those, embedded widgets that load inside someone else’s page and must stay small and marketing and content sites where javascript payload affects core web vitals are not what Svelte is typically brought in for.
What can Preact do that Svelte cannot?
Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

Preact: Is Preact free?

Yes, open source under the MIT licence.

Svelte: How much does Svelte cost?

Svelte is completely free and open source under the MIT license. There are no paid plans, subscriptions, or licensing fees for any use case.

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.

Svelte: Who maintains and funds Svelte?

Svelte is backed by Vercel as the primary corporate sponsor, along with community donors and corporate sponsors including GitHub, Cohere, Sanity, Sentry, and Sourcegraph. Development is maintained by full-time and part-time open source maintainers.

Source
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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