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Web Development · head to head

.NET vs Preact

.NET logo

.NET

Web Development

Free, cross-platform, open source developer platform

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: .NET .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date; 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 .NET and Preact actually diverge.

Attributes where .NET and Preact differ
Attribute.NETPreact
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 .NET

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.

.NET

  • Web development with ASP.NET Core and Entity Frameworknot Preact
  • Cloud-native application development for Azurenot Preact
  • Mobile and desktop apps with .NET MAUI cross-platform frameworknot Preact
  • AI and machine learning applications using C#not Preact

Preact

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

Where each one falls short

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

.NET

  • .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date
  • Standard Term Support releases get only 2 years of patches versus 3 years for Long Term Support releases, per Microsoft's own support policy page, so teams on an STS release face a shorter upgrade cycle

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

.NET

Free

No published plan breakdown. See the .NET review.

Preact

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

Which should you pick?

Choose .NET if

  • You want to start without paying.
.NET 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 .NET or Preact better?
Neither clearly leads. .NET 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, .NET or Preact?
.NET starts at Free and Preact at Free.
Does .NET or Preact run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use .NET for free?
Both have a free tier, so you can try either at no cost before committing.
What is .NET best used for?
.NET is most often used for web development with asp.net core and entity framework, cloud-native application development for azure, mobile and desktop apps with .net maui cross-platform framework, ai and machine learning applications using c#. Of those, web development with asp.net core and entity framework and cloud-native application development for azure are not what Preact is typically brought in for.
What can .NET do that Preact cannot?
Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

.NET: Is .NET free to use?

Yes. .NET is completely free and open-source, available on GitHub.

Source
Preact: Is Preact free?

Yes, open source under the MIT licence.

.NET: What platforms does .NET support?

.NET supports Windows, Linux, macOS, and Docker. A single C# codebase can run across multiple platforms including iOS, Android, and cloud environments.

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.

.NET: How large is the .NET ecosystem?

NuGet provides 390,000+ unique packages with 50,000+ new packages added annually. .NET has 474K+ GitHub stars and active community support across multiple platforms.

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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