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Developer Tools · head to head

GNAT Pro vs Ory Kratos

GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite
Ory Kratos logo

Ory Kratos

Cybersecurity

Headless identity and user management API

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Ory Kratos 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; Ory Kratos headless means you build every screen, which is significant work compared with a hosted login page

Where they differ

Only the attributes on which GNAT Pro and Ory Kratos actually diverge.

Attributes where GNAT Pro and Ory Kratos differ
AttributeGNAT ProOry Kratos
Starting priceOn requestFree
Pricing modelquoteOpen-source self-hosted, with a paid managed network
Free tierNoYes
PlatformsWebLinux, Docker, Kubernetes, Self-hosted
CategoryDeveloper ToolsCybersecurity

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 GNAT Pro

Nothing recorded that Ory Kratos does not also cover.

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.

GNAT Pro

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

Ory Kratos

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

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

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Ory Kratos

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

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro 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 GNAT Pro or Ory Kratos better?
Neither clearly leads. GNAT Pro starts at On request and Ory Kratos at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Ory Kratos?
Ory Kratos has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Ory Kratos.
Does GNAT Pro or Ory Kratos run on more platforms?
GNAT Pro runs on Web. Ory Kratos runs on Linux, Docker, Kubernetes, Self-hosted.
Can I use Ory Kratos for free?
Yes. Ory Kratos 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 Ory Kratos is typically brought in for.
What can GNAT Pro do that Ory Kratos cannot?
Ory Kratos covers Headless API, Self-service flows, Multi-factor authentication, Pluggable identity schemas.

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
Ory Kratos: Is Ory Kratos free?

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

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
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.

Ory Kratos: Does Kratos do OAuth2?

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

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