Softwr

Developer Tools · head to head

Cloud Native Buildpacks vs Preact

Cloud Native Buildpacks logo

Cloud Native Buildpacks

Developer Tools

Specification and tooling that turns source code into OCI images without Dockerfiles

From
Free
Free plan
Yes
Full reviewWebsite
Preact logo

Preact

Web Development

3kB alternative to React with the same modern API

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Cloud Native Buildpacks the operational cost is real: you own builder images, base image refresh cadence and migrations between specification versions, which currently sit at Buildpack API 0.10 and Platform API 0.12 with published migration guides, so breaking changes are a recurring chore.; 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: Cloud Native Buildpacks covers Detect and build lifecycle, Preact covers 3kB runtime.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cloud Native Buildpacks and Preact actually diverge.

Attributes where Cloud Native Buildpacks and Preact differ
AttributeCloud Native BuildpacksPreact
PlatformsLinux, macOS, Windows, CLI, Docker, KubernetesWeb
CategoryDeveloper ToolsWeb 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 Cloud Native Buildpacks

  • Detect and build lifecycle
  • Image rebasing
  • Reproducible layers
  • Builder images
  • Automatic SBOM output
  • pack CLI

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.

Cloud Native Buildpacks

  • Patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying eachnot Preact
  • Removing per-team Dockerfiles at an organisation where inconsistent base images have become an audit findingnot Preact
  • Giving application teams a supported path to a hardened image without teaching every team container securitynot Preact
  • Choosing a build system that a risk committee will accept because governance is vendor neutral rather than single vendornot Preact

Preact

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

Where each one falls short

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

Cloud Native Buildpacks

  • The operational cost is real: you own builder images, base image refresh cadence and migrations between specification versions, which currently sit at Buildpack API 0.10 and Platform API 0.12 with published migration guides, so breaking changes are a recurring chore.
  • A cold build with no warm cache is noticeably slower than a well layered Dockerfile, and because the cache lives in a cache image or volume, ephemeral continuous integration runners pay full price on every run unless you deliberately warm them.
  • Reproducibility depends on discipline rather than defaults, because buildpacks resolve runtime patch versions at build time unless you pin them and stability is only as good as the builder image tag you point at.
  • The specification is neutral but the buildpacks are not, and in practice you depend on Paketo, Heroku or Google, whose roadmaps, support levels and update cadences differ; CNCF also records contributing organisations down 12 per cent year on year.
  • Native dependencies, unusual monorepo layouts and non-standard project structures push you into writing custom buildpacks or extensions, which is a genuine engineering investment and not a configuration change.

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

Cloud Native Buildpacks

Free
  • Cloud Native BuildpacksFree
    • Apache-2.0, hosted by the CNCF
    • No commercial edition from the project itself
    • Commercial support only from vendors of specific buildpack distributions

Preact

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

Which should you pick?

Choose Cloud Native Buildpacks if

  • You need detect and build lifecycle.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, CLI, Docker, Kubernetes.
  • You also want image rebasing.
Cloud Native Buildpacks 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 Cloud Native Buildpacks or Preact better?
Neither clearly leads. Cloud Native Buildpacks 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, Cloud Native Buildpacks or Preact?
Cloud Native Buildpacks starts at Free and Preact at Free.
Does Cloud Native Buildpacks or Preact run on more platforms?
Cloud Native Buildpacks runs on Linux, macOS, Windows, CLI, Docker, Kubernetes. Preact runs on Web.
Can I use Cloud Native Buildpacks for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cloud Native Buildpacks best used for?
Cloud Native Buildpacks is most often used for patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying each, removing per-team dockerfiles at an organisation where inconsistent base images have become an audit finding, giving application teams a supported path to a hardened image without teaching every team container security, choosing a build system that a risk committee will accept because governance is vendor neutral rather than single vendor. Of those, patching a base image once and rebasing hundreds of application images rather than rebuilding and redeploying each and removing per-team dockerfiles at an organisation where inconsistent base images have become an audit finding are not what Preact is typically brought in for.
What can Cloud Native Buildpacks do that Preact cannot?
Cloud Native Buildpacks covers Detect and build lifecycle, Image rebasing, Reproducible layers, Builder images. Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

Cloud Native Buildpacks: What does CNCF graduation actually change?

Nothing technically, but it signals audited governance, security review and multi-vendor maintenance, which is usually what a procurement or risk team needs before approving a build system.

Preact: Is Preact free?

Yes, open source under the MIT licence.

Cloud Native Buildpacks: How is this different from writing a Dockerfile?

Container build knowledge lives with the platform team in a builder image rather than in every repository, and rebasing lets you patch the runtime base of many images without rebuilding them.

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.

Cloud Native Buildpacks: Does it cost anything?

No. The specification and tooling are Apache-2.0 and free. You pay only if you buy commercial support for a specific buildpack distribution from Broadcom, Heroku or Google.

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.

Cloud Native Buildpacks: Is it slower than a Dockerfile?

On a cold build with no cache, yes. Warm builds are competitive, but continuous integration runners that start empty every time will feel the difference.

Share

Related pages

More on Cloud Native Buildpacks

More on Preact

Keep looking

Other head to heads