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Cloud Native Buildpacks vs Ory Kratos

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
Ory Kratos logo

Ory Kratos

Cybersecurity

Headless identity and user management 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.; Ory Kratos headless means you build every screen, which is significant work compared with a hosted login page
  • They diverge on capability: Cloud Native Buildpacks covers Detect and build lifecycle, Ory Kratos covers Headless API.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

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

Attributes where Cloud Native Buildpacks and Ory Kratos differ
AttributeCloud Native BuildpacksOry Kratos
Pricing modelOpen source, no licence feeOpen-source self-hosted, with a paid managed network
PlatformsLinux, macOS, Windows, CLI, Docker, KubernetesLinux, Docker, Kubernetes, Self-hosted
CategoryDeveloper ToolsCybersecurity

Identical on both: starting price (Free), 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 Ory Kratos

  • Headless API
  • Self-service flows
  • Multi-factor authentication
  • Pluggable identity schemas

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

Ory Kratos

  • Products needing complete control over the look and flow of authenticationnot Cloud Native Buildpacks
  • Applications that must not hand user identity data to a third partynot Cloud Native Buildpacks
  • Teams building identity as infrastructure across several servicesnot 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.

Ory Kratos

  • Headless means you build every screen, which is significant work compared with a hosted login page
  • More moving parts than a monolithic IAM: Kratos handles identity, and OAuth2 needs Ory Hydra alongside
  • Documentation assumes real familiarity with identity concepts and is not a gentle introduction
  • Self-hosting identity carries the security and availability burden that hosted providers absorb

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

Ory Kratos

Free
  • Self-hostedFree
    • Full identity server
    • All flows
    • Community support

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 Ory Kratos if

  • You need headless api.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want self-service flows.
Ory Kratos review

Questions people ask

Is Cloud Native Buildpacks or Ory Kratos better?
Neither clearly leads. Cloud Native Buildpacks starts at Free and Ory Kratos at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cloud Native Buildpacks or Ory Kratos?
Cloud Native Buildpacks starts at Free and Ory Kratos at Free.
Does Cloud Native Buildpacks or Ory Kratos run on more platforms?
Cloud Native Buildpacks runs on Linux, macOS, Windows, CLI, Docker, Kubernetes. Ory Kratos runs on Linux, Docker, Kubernetes, Self-hosted.
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 Ory Kratos is typically brought in for.
What can Cloud Native Buildpacks do that Ory Kratos cannot?
Cloud Native Buildpacks covers Detect and build lifecycle, Image rebasing, Reproducible layers, Builder images. Ory Kratos covers Headless API, Self-service flows, Multi-factor authentication, Pluggable identity schemas.

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.

Ory Kratos: Is Ory Kratos free?

Yes, open source and free to self-host. Ory Network is a paid managed service.

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.

Ory Kratos: What does headless mean here?

Kratos provides identity flows as APIs and no user interface. You build the login, registration and recovery screens yourself.

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.

Ory Kratos: Does Kratos do OAuth2?

No. Kratos handles user identity; OAuth2 and OpenID Connect provider functionality is Ory Hydra, a separate component.

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.

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