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Cloud · head to head

Cilium vs Cloudflare

Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Cloudflare logo

Cloudflare

Networking

The web performance and security company

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cilium requires a recent Linux kernel, which rules out older distributions and some managed environments; Cloudflare free tier limited to basic features (no advanced analytics or premium features)
  • They diverge on capability: Cilium covers eBPF datapath, Cloudflare covers Global CDN.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cilium and Cloudflare actually diverge.

Attributes where Cilium and Cloudflare differ
AttributeCiliumCloudflare
Pricing modelOpen source, no licence feefreemium
PlatformsKubernetes, LinuxWeb
CategoryCloudNetworking
FoundedUnknown2009

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 Cilium

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

Only in Cloudflare

  • Global CDN
  • DDoS Protection
  • WAF
  • DNS
  • SSL/TLS
  • Load Balancing
  • Bot Management
  • Workers (Serverless)

What people use each for

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

Cilium

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

Cloudflare

  • Global content delivery network (CDN) with 330+ data centres worldwidenot Cilium
  • DDoS protection and bot blockingnot Cilium
  • Web application security and rate limitingnot Cilium
  • DNS management and domain protectionnot Cilium
  • Static and dynamic content cachingnot Cilium
  • Serverless computing via Cloudflare Workersnot Cilium
  • Database and storage services (D1, R2)not Cilium
  • Performance optimisation for Core Web Vitalsnot Cilium

Where each one falls short

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

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

Cloudflare

  • Free tier limited to basic features (no advanced analytics or premium features)
  • Pro tier ($20-25/month) caps at professional websites (higher tiers needed for enterprise scale)
  • Caches only anonymous API GET responses (authenticated requests and non-GET methods not cached)
  • Geographic coverage limited to announced 330+ cities (may not cover all regions globally)

Pricing, plan by plan

Cilium

Free
  • CiliumFree
    • Full functionality
    • No usage limits
    • Community support

Cloudflare

Free

No published plan breakdown. See the Cloudflare review.

Which should you pick?

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

Choose Cloudflare if

  • You need global cdn.
  • You want to start without paying.
  • You also want ddos protection.
Cloudflare review

Questions people ask

Is Cilium or Cloudflare better?
Neither clearly leads. Cilium starts at Free and Cloudflare at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cilium or Cloudflare?
Cilium starts at Free and Cloudflare at Free.
Does Cilium or Cloudflare run on more platforms?
Cilium runs on Kubernetes, Linux. Cloudflare runs on Web.
Can I use Cilium for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cilium best used for?
Cilium is most often used for kubernetes networking at a scale where iptables-based cni performance degrades, network policy expressed on workload identity rather than fragile ip rules, seeing which services actually talk to each other, and what policy is dropping. Of those, kubernetes networking at a scale where iptables-based cni performance degrades and network policy expressed on workload identity rather than fragile ip rules are not what Cloudflare is typically brought in for.
What can Cilium do that Cloudflare cannot?
Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Cloudflare covers Global CDN, DDoS Protection, WAF, DNS.

Answered from the vendors’ own pages

Cilium: Is Cilium free?

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

Cloudflare: Does Cloudflare have a free tier?

Yes, Cloudflare includes a free tier with generous allowances: 100k daily requests for Workers, 10 GB monthly storage for R2, and 1 GB for Workers KV.

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.

Cloudflare: How much does Cloudflare cost beyond the free tier?

Cloudflare uses pay-as-you-go pricing beyond free allocations, charging per million requests, per GB-month of storage, or per vCPU-second depending on the service.

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.

Cloudflare: Does Cloudflare charge egress fees?

No, Cloudflare explicitly states no egress fees and no hidden costs; you only pay for the usage metrics specific to each service.

Source
Cloudflare: What's the Enterprise pricing model for Cloudflare?

Cloudflare Enterprise offers custom pricing and volume discounts available through direct sales for organizations with specialized needs and large-scale usage.

Source
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