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Developer Tools · head to head

GNAT Pro vs Zephyr Scale

GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite
Zephyr Scale logo

Zephyr Scale

Testing

Native test management for Jira

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; Zephyr Scale tightly bound to Jira; limited standalone functionality outside Jira ecosystem

Where they differ

Only the attributes on which GNAT Pro and Zephyr Scale actually diverge.

Attributes where GNAT Pro and Zephyr Scale differ
AttributeGNAT ProZephyr Scale
CategoryDeveloper ToolsTesting

Identical on both: starting price (On request), pricing model (quote), free tier (No), platforms (Web), 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 Zephyr Scale
  • Developing automotive embedded systems with ISO-26262 compliancenot Zephyr Scale
  • Integrating Ada, C/C++, and Rust components in single codebasenot Zephyr Scale
  • Managing software supply chain vulnerabilities and SBOMsnot Zephyr Scale
  • Supporting long-lived software systems spanning decadesnot Zephyr Scale

Zephyr Scale

  • Test case management within Jira workflowsnot GNAT Pro
  • Manual and automated test execution trackingnot GNAT Pro
  • Cross-project test asset reusenot GNAT Pro
  • Requirements traceability from stories to testsnot GNAT Pro
  • CI/CD pipeline and BDD framework integrationnot 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

Zephyr Scale

  • Tightly bound to Jira; limited standalone functionality outside Jira ecosystem
  • No-code automation features limited in Standard tier, expanded only in Advanced
  • Data residency feature unavailable for Essential tier, limiting enterprise compliance
  • Transparent cost structure not provided on marketing page

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Zephyr Scale

On request

No published plan breakdown. See the Zephyr Scale review.

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Zephyr Scale if

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

Zephyr Scale review

Questions people ask

Is GNAT Pro or Zephyr Scale better?
Neither clearly leads. GNAT Pro starts at On request and Zephyr Scale at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Zephyr Scale?
GNAT Pro starts at On request and Zephyr Scale at On request.
Does GNAT Pro or Zephyr Scale run on more platforms?
Both run on Web, so platform support will not decide this one for you.
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 Zephyr Scale 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
Zephyr Scale: How much does Zephyr Scale cost?

Zephyr Scale pricing is not published on the website. Three tiers are available: Essential, Standard, and Advanced, plus QMetry for Jira. Contact SmartBear or visit Atlassian Marketplace for pricing details.

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
Zephyr Scale: Is there a free trial available?

Yes, Zephyr offers free trials for Essential, Standard, and Advanced tiers, as well as for QMetry. Visit the product page to start a trial.

Source
Zephyr Scale: Does Zephyr Scale work outside of Jira?

Zephyr Scale is tightly integrated with Jira for test management. For standalone test management outside Jira, SmartBear offers QMetry as an alternative.

Source
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