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Developer Tools · head to head

GNAT Pro vs PHP

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
PHP logo

PHP

Web Development

A popular general-purpose scripting language that is especially suited to web development

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only PHP 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; PHP distributed under the Modified BSD License, also called the PHP License version 4, per php.net/license/; there is no paid tier or vendor price to compare
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where GNAT Pro and PHP differ
AttributeGNAT ProPHP
Starting priceOn requestFree
Pricing modelquoteopen-source
Free tierNoYes
CategoryDeveloper ToolsWeb Development

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

PHP

  • Server-side web developmentnot GNAT Pro
  • Content management systemsnot GNAT Pro
  • API backendsnot 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

PHP

  • Distributed under the Modified BSD License, also called the PHP License version 4, per php.net/license/; there is no paid tier or vendor price to compare
  • PHP 8.2 lost active support on 31 Dec 2024 and enters full end of life on 31 Dec 2026, with only security fixes since, per php.net/supported-versions.php (Aug 2026)

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

PHP

Free

No published plan breakdown. See the PHP review.

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose PHP if

  • You want to start without paying.
PHP review

Questions people ask

Is GNAT Pro or PHP better?
Neither clearly leads. GNAT Pro starts at On request and PHP at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or PHP?
PHP has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for PHP.
Does GNAT Pro or PHP run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use PHP for free?
Yes. PHP 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 PHP 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
PHP: Is PHP free to use?

Yes, PHP is completely free and open-source software under the PHP Foundation governance. There are no licensing fees or paid tiers.

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
PHP: Does the PHP Foundation offer paid support?

The PHP Foundation accepts voluntary donations to support long-term development, but donations are optional and not required to use PHP.

Source
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