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Web Development · head to head

Apache HTTP Server vs Keycloak

Apache HTTP Server logo

Apache HTTP Server

Web Development

The world's most used web server software

From
Free
Free plan
Yes
Full reviewWebsite
Keycloak logo

Keycloak

Developer Tools

Open-source identity and access management server.

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • 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; Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Apache HTTP Server and Keycloak differ
AttributeApache HTTP ServerKeycloak
Pricing modelUnknownopen-source
PlatformsLinux, Windows, macOS, Unix-like systemsSelf-hosted, Docker, Kubernetes, Linux, Windows, API
CategoryWeb DevelopmentDeveloper Tools
Founded1995Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Keycloak

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 Keycloak
  • Static site servingnot Keycloak
  • Reverse proxynot Keycloak
  • Load balancingnot Keycloak
  • SSL terminationnot Keycloak
  • Content deliverynot Keycloak

Keycloak

  • Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Apache HTTP Server
  • Companies with existing LDAP/Active Directory systems needing federated authenticationnot Apache HTTP Server
  • Open-source projects and communities requiring free IAM without licensing costsnot Apache HTTP Server
  • Enterprises building custom identity workflows requiring fine-grained authorisationnot Apache HTTP Server
  • Teams with sufficient operational expertise to manage infrastructurenot 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

Keycloak

  • Requires self-hosted deployment and operational expertise to install, configure and maintain
  • No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
  • Clustering and high-availability configurations require additional operational knowledge
  • Community support only; commercial support requires third-party vendors or distributions

Pricing, plan by plan

Apache HTTP Server

Free

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

Keycloak

Free
  • Open-sourceFree
    • Full platform functionality
    • Self-hosted deployment
    • Community support

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 Keycloak if

  • You want to start without paying.
  • You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Keycloak review

Questions people ask

Is Apache HTTP Server or Keycloak better?
Neither clearly leads. Apache HTTP Server starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache HTTP Server or Keycloak?
Apache HTTP Server starts at Free and Keycloak at Free.
Does Apache HTTP Server or Keycloak run on more platforms?
Apache HTTP Server runs on Linux, Windows, macOS, Unix-like systems. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Can I use Apache HTTP Server for free?
Both have a free tier, so you can try either at no cost before committing.
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 Keycloak is typically brought in for.
What can Apache HTTP Server do that Keycloak 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
Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

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
Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

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
Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

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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