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Web Development · head to head

Apache HTTP Server vs Cilium

Apache HTTP Server logo

Apache HTTP Server

Web Development

The world's most used web server software

From
Free
Rated
-
Full reviewWebsite
Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
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; Cilium requires a recent Linux kernel, which rules out older distributions and some managed environments
  • They diverge on capability: Apache HTTP Server covers HTTP/1.1 and HTTP/2 support, Cilium covers eBPF datapath.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Apache HTTP Server and Cilium differ
AttributeApache HTTP ServerCilium
Pricing modelUnknownOpen source, no licence fee
PlatformsLinux, Windows, macOS, Unix-like systemsKubernetes, Linux
CategoryWeb DevelopmentCloud
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 Cilium

  • eBPF datapath
  • Identity-based policy
  • Hubble observability
  • Sidecar-free mesh

What people use each for

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

Apache HTTP Server

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

Cilium

  • Kubernetes networking at a scale where iptables-based CNI performance degradesnot Apache HTTP Server
  • Network policy expressed on workload identity rather than fragile IP rulesnot Apache HTTP Server
  • Seeing which services actually talk to each other, and what policy is droppingnot 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

Cilium

  • Requires a recent Linux kernel, which rules out older distributions and some managed environments
  • eBPF is genuinely hard to debug when it misbehaves, and the skill is rare on most teams
  • Broad scope — CNI, policy, mesh, observability — means the learning curve covers several domains at once

Pricing, plan by plan

Apache HTTP Server

Free

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

Cilium

Free
  • CiliumFree
    • Full functionality
    • No usage limits
    • 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 Cilium if

  • You need ebpf datapath.
  • You want to start without paying.
  • You work on Kubernetes, Linux.
  • You also want identity-based policy.
Cilium review

Questions people ask

Is Apache HTTP Server or Cilium better?
Neither clearly leads. Apache HTTP Server starts at Free and Cilium at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache HTTP Server or Cilium?
Apache HTTP Server starts at Free and Cilium at Free.
Does Apache HTTP Server or Cilium run on more platforms?
Apache HTTP Server runs on Linux, Windows, macOS, Unix-like systems. Cilium runs on Kubernetes, Linux.
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 Cilium is typically brought in for.
What can Apache HTTP Server do that Cilium cannot?
Apache HTTP Server covers HTTP/1.1 and HTTP/2 support, Virtual hosting, SSL/TLS encryption, URL rewriting. Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh.

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
Cilium: Is Cilium free?

Yes, open source and CNCF-graduated. Isovalent sells an enterprise distribution and support.

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
Cilium: What does eBPF change?

It lets Cilium run packet-processing programs inside the kernel instead of relying on iptables rule chains, which behave poorly as the number of services grows.

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
Cilium: Does Cilium replace a service mesh?

It can cover much of what a mesh does without sidecars, though full mesh feature sets still favour Istio or Linkerd.

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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