Softwr

Developer Tools · head to head

GNAT Pro vs Keycloak

GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite
Keycloak logo

Keycloak

Developer Tools

Open-source identity and access management server.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Keycloak has a free tier, so it costs nothing to try first.
  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain

Where they differ

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

Attributes where GNAT Pro and Keycloak differ
AttributeGNAT ProKeycloak
Starting priceOn requestFree
Pricing modelquoteopen-source
Free tierNoYes
PlatformsWebSelf-hosted, Docker, Kubernetes, Linux, Windows, API

Identical on both: user rating (Not yet rated), category (Developer Tools).

What people use each for

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

GNAT Pro

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

Keycloak

  • Organisations requiring self-hosted identity infrastructure for compliance or data residencynot GNAT Pro
  • Companies with existing LDAP/Active Directory systems needing federated authenticationnot GNAT Pro
  • Open-source projects and communities requiring free IAM without licensing costsnot GNAT Pro
  • Enterprises building custom identity workflows requiring fine-grained authorisationnot GNAT Pro
  • Teams with sufficient operational expertise to manage infrastructurenot GNAT Pro

Where each one falls short

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

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

Keycloak

  • Requires self-hosted deployment and operational expertise to install, configure and maintain
  • No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
  • Clustering and high-availability configurations require additional operational knowledge
  • Community support only; commercial support requires third-party vendors or distributions

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Keycloak

Free
  • Open-sourceFree
    • Full platform functionality
    • Self-hosted deployment
    • Community support

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Keycloak if

  • You want to start without paying.
  • You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Keycloak review

Questions people ask

Is GNAT Pro or Keycloak better?
Neither clearly leads. GNAT Pro starts at On request and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Keycloak?
Keycloak has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Keycloak.
Does GNAT Pro or Keycloak run on more platforms?
GNAT Pro runs on Web. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Can I use Keycloak for free?
Yes. Keycloak has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is GNAT Pro best used for?
GNAT Pro is most often used for building certified avionics software meeting do-178b/c standards, developing automotive embedded systems with iso-26262 compliance, integrating ada, c/c++, and rust components in single codebase, managing software supply chain vulnerabilities and sboms. Of those, building certified avionics software meeting do-178b/c standards and developing automotive embedded systems with iso-26262 compliance are not what Keycloak is typically brought in for.

Answered from the vendors’ own pages

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
Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

Source
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
Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

Source
Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

Source
Share

Related pages

More on GNAT Pro

More on Keycloak

Keep looking

Other head to heads