Softwr

Developer Tools · head to head

GNAT Pro vs Prettier

GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite
Prettier logo

Prettier

Developer Tools

Opinionated code formatter

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Prettier 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; Prettier inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where GNAT Pro and Prettier differ
AttributeGNAT ProPrettier
Starting priceOn requestFree
Pricing modelquotefree
Free tierNoYes
PlatformsWebCLI, Editor Plugins, Build Tools
FoundedUnknown2016

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

Prettier

  • Automatically formatting TypeScript files to project style standardsnot GNAT Pro
  • Enforcing consistent HTML indentation across component filesnot GNAT Pro
  • Removing style-related comments from pull request reviewsnot GNAT Pro
  • Formatting GraphQL queries with consistent indentationnot 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

Prettier

  • Inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults
  • Developers must format entire files rather than selective line ranges in some contexts
  • Limited language support compared to some alternatives, though it covers major languages

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Prettier

Free

No published plan breakdown. See the Prettier review.

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Prettier if

  • You want to start without paying.
  • You work on CLI, Editor Plugins, Build Tools.
Prettier review

Questions people ask

Is GNAT Pro or Prettier better?
Neither clearly leads. GNAT Pro starts at On request and Prettier at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Prettier?
Prettier has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Prettier.
Does GNAT Pro or Prettier run on more platforms?
GNAT Pro runs on Web. Prettier runs on CLI, Editor Plugins, Build Tools.
Can I use Prettier for free?
Yes. Prettier 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 Prettier 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
Prettier: Is Prettier free and open source?

Yes, Prettier is completely free and open source, available as an npm package with no licensing costs or subscriptions.

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
Prettier: Can Prettier be integrated with ESLint?

Yes, Prettier integrates with ESLint by disabling ESLint formatting rules via eslint-config-prettier, allowing both tools to work together with Prettier handling formatting and ESLint handling code quality.

Source
Prettier: Does Prettier support configuration customization?

Prettier is intentionally opinionated with limited configuration options to enforce consistency. You can create a .prettierrc file for basic customization, but Prettier does not support extensive rule customization like ESLint.

Source
Share

Related pages

More on GNAT Pro

More on Prettier

Keep looking

Other head to heads