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Developer Tools · head to head

GNAT Pro vs WorkOS

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
WorkOS logo

WorkOS

Cybersecurity

Developer platform for enterprise-ready authentication and identity.

From
$125/one-time per connection
Free plan
No
Full reviewWebsite

The short version

  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; WorkOS authKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where GNAT Pro and WorkOS differ
AttributeGNAT ProWorkOS
Starting priceOn request$125/one-time per connection
Pricing modelquoteusage-based
PlatformsWebWeb, API
CategoryDeveloper ToolsCybersecurity

Identical on both: free tier (No), user rating (Not yet rated).

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 WorkOS
  • Developing automotive embedded systems with ISO-26262 compliancenot WorkOS
  • Integrating Ada, C/C++, and Rust components in single codebasenot WorkOS
  • Managing software supply chain vulnerabilities and SBOMsnot WorkOS
  • Supporting long-lived software systems spanning decadesnot WorkOS

WorkOS

  • SaaS applications needing rapid enterprise SSO deploymentnot GNAT Pro
  • Companies selling to mid-market and enterprise customersnot GNAT Pro
  • Applications requiring SCIM directory sync with corporate identity systemsnot GNAT Pro
  • Product teams needing audit logs for compliance (SOC 2, ISO 27001)not GNAT Pro
  • Platforms with multiple identity provider requirementsnot 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

WorkOS

  • AuthKit free tier limited to 1 million monthly active users; additional millions cost $2,500/month
  • Per-connection pricing for SSO and Directory Sync ($125–$50 each) scales poorly for enterprises with many identity providers
  • Audit logs require separate subscription at $125/month per SIEM connection or $99/month per 1 million events
  • Radar fraud protection billed separately at $100/month per 50,000 additional checks beyond 1,000 free checks
  • Custom domain feature requires $99/month subscription
  • Requires annual commitment for SLA and support guarantees; pay-as-you-go tier lacks uptime guarantee

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

WorkOS

$125/one-time per connection
  • Pay as You Go$undefined/variable
    • Per-connection pricing from $125 to $50 with volume discounts
    • Up to 60% discount at scale
    • Quick deployment
  • Annual Credits$undefined/variable
    • Custom pricing with volume discounts
    • 99.99% uptime SLA
    • Guided migration

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose WorkOS if

  • You work on Web, API.
WorkOS review

Questions people ask

Is GNAT Pro or WorkOS better?
Neither clearly leads. GNAT Pro starts at On request and WorkOS at $125/one-time per connection, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or WorkOS?
GNAT Pro starts at On request and WorkOS at $125/one-time per connection.
Does GNAT Pro or WorkOS run on more platforms?
GNAT Pro runs on Web. WorkOS runs on Web, API.
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 WorkOS 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
WorkOS: How quickly can I implement WorkOS SSO?

Developers can implement single sign-on in minutes instead of months. Multiple customers report setting up SSO in less than a week, with WorkOS handling the complexity of SAML and OIDC protocols.

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
WorkOS: What SDKs does WorkOS provide?

WorkOS offers SDKs for Node.js, Python, Ruby, Go, PHP, Java, and .NET.

Source
WorkOS: Does WorkOS support SCIM provisioning?

Yes. WorkOS supports SCIM provisioning integration with systems like Okta and Entra ID for automated user management.

Source
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