Softwr

Cloud · head to head

containerd vs GNAT Pro

containerd logo

containerd

Cloud

Industry-standard container runtime, and the engine inside Docker

From
Free
Free plan
Yes
Full reviewWebsite
GNAT Pro logo

GNAT Pro

Developer Tools

Software development environments and toolchains for Ada, C/C++ and Rust

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only containerd has a free tier, so it costs nothing to try first.
  • Each has a real cost: containerd not a developer-facing tool: there is no build command and the CLI is deliberately minimal, so it needs companions like nerdctl or Buildah; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which containerd and GNAT Pro actually diverge.

Attributes where containerd and GNAT Pro differ
AttributecontainerdGNAT Pro
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, WindowsWeb
CategoryCloudDeveloper Tools

Identical on both: 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 containerd

  • Full container lifecycle
  • CRI support
  • OCI compliant
  • Snapshotter plugins
  • Namespaces
  • Stable API

Only in GNAT Pro

Nothing recorded that containerd does not also cover.

What people use each for

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

containerd

  • Running the container runtime under a Kubernetes cluster after the Docker shim removalnot GNAT Pro
  • Building a platform or PaaS that needs to execute containersnot GNAT Pro
  • Reducing the moving parts on nodes that only ever run Kubernetes workloadsnot GNAT Pro
  • Embedding container execution inside another productnot GNAT Pro

GNAT Pro

  • Building certified avionics software meeting DO-178B/C standardsnot containerd
  • Developing automotive embedded systems with ISO-26262 compliancenot containerd
  • Integrating Ada, C/C++, and Rust components in single codebasenot containerd
  • Managing software supply chain vulnerabilities and SBOMsnot containerd
  • Supporting long-lived software systems spanning decadesnot containerd

Where each one falls short

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

containerd

  • Not a developer-facing tool: there is no build command and the CLI is deliberately minimal, so it needs companions like nerdctl or Buildah
  • Debugging is lower-level than Docker, and error messages assume knowledge of the runtime internals
  • Documentation is aimed at platform engineers, so newcomers usually find Docker or Podman material more useful
  • No image building at all — that is out of scope by design

GNAT Pro

  • No pricing published on website; requires contacting AdaCore directly for quotes
  • Vendor indicates per-user, per-year subscription model but does not disclose specific costs

Pricing, plan by plan

containerd

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

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose containerd if

  • You need full container lifecycle.
  • You want to start without paying.
  • You work on Linux, Windows.
  • You also want cri support.
containerd review

Choose GNAT Pro if

Nothing in the data separates GNAT Pro from containerd on the points above - pick on price and on how each one feels to use.

GNAT Pro review

Questions people ask

Is containerd or GNAT Pro better?
Neither clearly leads. containerd starts at Free and GNAT Pro at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, containerd or GNAT Pro?
containerd has a free tier; the other does not. Paid plans start at Free for containerd and On request for GNAT Pro.
Does containerd or GNAT Pro run on more platforms?
containerd runs on Linux, Windows. GNAT Pro runs on Web.
Can I use containerd for free?
Yes. containerd has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is containerd best used for?
containerd is most often used for running the container runtime under a kubernetes cluster after the docker shim removal, building a platform or paas that needs to execute containers, reducing the moving parts on nodes that only ever run kubernetes workloads, embedding container execution inside another product. Of those, running the container runtime under a kubernetes cluster after the docker shim removal and building a platform or paas that needs to execute containers are not what GNAT Pro is typically brought in for.
What can containerd do that GNAT Pro cannot?
containerd covers Full container lifecycle, CRI support, OCI compliant, Snapshotter plugins.

Answered from the vendors’ own pages

containerd: Is containerd free?

Yes. It is an open-source CNCF graduated project with no licence fee.

GNAT Pro: How much does GNAT Pro cost?

GNAT Pro pricing is not published on the website. Customers must request a pricing quote by contacting AdaCore directly or speaking with a GNAT Pro expert.

Source
containerd: Do I need containerd if I use Docker?

You already have it. Docker uses containerd underneath to run containers; it is not an alternative you install separately.

GNAT Pro: What is GNAT Pro licensing model?

GNAT Pro is sold on a per-user, per-year basis with no license locks. Customers can request pricing for their specific needs.

Source
containerd: Why did Kubernetes drop Docker for containerd?

Kubernetes talks to runtimes through the Container Runtime Interface. Docker did not speak CRI natively and needed a shim, so Kubernetes removed the shim and talks to containerd directly, which Docker was already using anyway.

containerd: Can containerd build images?

No. Image building is deliberately out of scope. Tools such as Buildah, BuildKit or Docker handle that.

Share

Related pages

More on containerd

More on GNAT Pro

Keep looking

Other head to heads