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Cloud · head to head

Buildah vs Preact

Buildah logo

Buildah

Cloud

Build OCI container images without a daemon or a Dockerfile

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: Buildah linux only, with no native macOS or Windows support; 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: Buildah covers Daemonless builds, Preact covers 3kB runtime.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Buildah and Preact actually diverge.

Attributes where Buildah and Preact differ
AttributeBuildahPreact
PlatformsLinuxWeb
CategoryCloudWeb Development

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).

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 Buildah

  • Daemonless builds
  • Rootless
  • Dockerfile compatible
  • Scriptable builds

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.

Buildah

  • Building images in CI without a privileged Docker daemonnot Preact
  • Producing minimal images with tighter layer control than a Dockerfile givesnot Preact
  • Scripted image assembly where a Dockerfile is the wrong abstractionnot Preact

Preact

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

Where each one falls short

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

Buildah

  • Linux only, with no native macOS or Windows support
  • Scriptable builds are powerful but less portable and less familiar than a Dockerfile
  • Narrow by design: it builds images and does not run them, so it needs Podman or another runtime alongside

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

Buildah

Free
  • BuildahFree
    • Full functionality
    • No usage limits
    • Community support

Preact

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

Which should you pick?

Choose Buildah if

  • You need daemonless builds.
  • You want to start without paying.
  • You work on Linux.
  • You also want rootless.
Buildah 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 Buildah or Preact better?
Neither clearly leads. Buildah 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, Buildah or Preact?
Buildah starts at Free and Preact at Free.
Does Buildah or Preact run on more platforms?
Buildah runs on Linux. Preact runs on Web.
Can I use Buildah for free?
Both have a free tier, so you can try either at no cost before committing.
What is Buildah best used for?
Buildah is most often used for building images in ci without a privileged docker daemon, producing minimal images with tighter layer control than a dockerfile gives, scripted image assembly where a dockerfile is the wrong abstraction. Of those, building images in ci without a privileged docker daemon and producing minimal images with tighter layer control than a dockerfile gives are not what Preact is typically brought in for.
What can Buildah do that Preact cannot?
Buildah covers Daemonless builds, Rootless, Dockerfile compatible, Scriptable builds. Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

Buildah: Is Buildah free?

Yes, open source with no licence fee.

Preact: Is Preact free?

Yes, open source under the MIT licence.

Buildah: Do I still need a Dockerfile?

No. Buildah reads Dockerfiles if you have them, but images can be built entirely from shell commands instead.

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.

Buildah: How is Buildah different from Podman?

Buildah builds images; Podman runs them. Podman actually embeds Buildah for its build command, and the two are designed to be used together.

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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