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Apache HTTP Server vs GNAT Pro

Apache HTTP Server logo

Apache HTTP Server

Web Development

The world's most used web server software

From
Free
Free plan
Yes
Full reviewWebsite
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

The short version

  • Only Apache HTTP Server has a free tier, so it costs nothing to try first.
  • Each has a real cost: Apache HTTP Server process-based or thread-based architecture consumes more memory per connection than nginx's event-driven model; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Apache HTTP Server and GNAT Pro actually diverge.

Attributes where Apache HTTP Server and GNAT Pro differ
AttributeApache HTTP ServerGNAT Pro
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
PlatformsLinux, Windows, macOS, Unix-like systemsWeb
CategoryWeb DevelopmentDeveloper Tools
Founded1995Unknown

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 Apache HTTP Server

  • HTTP/1.1 and HTTP/2 support
  • Virtual hosting
  • SSL/TLS encryption
  • URL rewriting
  • Load balancing
  • Compression
  • Authentication modules
  • Logging and monitoring

Only in GNAT Pro

Nothing recorded that Apache HTTP Server does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Apache HTTP Server

  • Web hostingnot GNAT Pro
  • Static site servingnot GNAT Pro
  • Reverse proxynot GNAT Pro
  • Load balancingnot GNAT Pro
  • SSL terminationnot GNAT Pro
  • Content deliverynot GNAT Pro

GNAT Pro

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

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Apache HTTP Server

  • Process-based or thread-based architecture consumes more memory per connection than nginx's event-driven model
  • Static file serving performance lags behind nginx, particularly under high concurrency
  • Module system flexibility can add overhead compared to nginx's streamlined single-purpose design
  • Configuration complexity for advanced features like reverse proxying is higher than nginx
  • Performance monitoring in hybrid and cloud environments requires additional tools beyond built-in diagnostics

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

Pricing, plan by plan

Apache HTTP Server

Free

No published plan breakdown. See the Apache HTTP Server review.

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose Apache HTTP Server if

  • You need http/1.1 and http/2 support.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, Unix-like systems.
  • You also want virtual hosting.
Apache HTTP Server review

Choose GNAT Pro if

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

GNAT Pro review

Questions people ask

Is Apache HTTP Server or GNAT Pro better?
Neither clearly leads. Apache HTTP Server starts at Free and GNAT Pro at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache HTTP Server or GNAT Pro?
Apache HTTP Server has a free tier; the other does not. Paid plans start at Free for Apache HTTP Server and On request for GNAT Pro.
Does Apache HTTP Server or GNAT Pro run on more platforms?
Apache HTTP Server runs on Linux, Windows, macOS, Unix-like systems. GNAT Pro runs on Web.
Can I use Apache HTTP Server for free?
Yes. Apache HTTP Server has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is Apache HTTP Server best used for?
Apache HTTP Server is most often used for web hosting, static site serving, reverse proxy, load balancing. Of those, web hosting and static site serving are not what GNAT Pro is typically brought in for.
What can Apache HTTP Server do that GNAT Pro cannot?
Apache HTTP Server covers HTTP/1.1 and HTTP/2 support, Virtual hosting, SSL/TLS encryption, URL rewriting.

Answered from the vendors’ own pages

Apache HTTP Server: Is Apache HTTP Server free?

Yes. Apache HTTP Server is free, open-source software developed by The Apache Software Foundation. There are no licensing fees for any edition.

Source
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
Apache HTTP Server: What is the latest stable version of Apache HTTP Server?

Apache httpd 2.4.68, released June 8, 2026, is the latest stable version from the 2.4.x branch and is recommended for all users. Apache httpd 2.2 is end-of-life (final release July 2017).

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
Apache HTTP Server: Does Apache support .htaccess configuration files?

Yes. Apache HTTP Server supports per-directory .htaccess configuration files, allowing configuration without modifying the main Apache configuration file. This flexibility is a key differentiator from nginx.

Source
Apache HTTP Server: How many Apache modules are available?

Apache includes 100+ modules for functionality like URL rewriting, reverse proxying, load balancing, caching, authentication, and scripting. Modules can be compiled statically or loaded dynamically at runtime using mod_so.

Source
Apache HTTP Server: Can Apache run on Linux?

Yes. Apache HTTP Server is fully supported on Linux (Red Hat, Debian, Ubuntu), Windows Server, macOS, and Unix-like systems.

Source
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