Cloud · head to head
Cilium vs Skopeo
Cilium
Cloud
eBPF-based networking, observability and security for Kubernetes
- From
- Free
- Rated
- -
Skopeo
Cloud
Inspect, copy and sign container images without pulling them
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Cilium requires a recent Linux kernel, which rules out older distributions and some managed environments; Skopeo single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
- They diverge on capability: Cilium covers eBPF datapath, Skopeo covers Remote inspection.
Where they differ
Only the attributes on which Cilium and Skopeo actually diverge.
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated), category (Cloud).
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 Skopeo
- Remote inspection
- Registry-to-registry copy
- Format conversion
- Image signing
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 Skopeo
- Network policy expressed on workload identity rather than fragile IP rulesnot Skopeo
- Seeing which services actually talk to each other, and what policy is droppingnot Skopeo
Skopeo
- Promoting images between staging and production registries without a round tripnot Cilium
- Inspecting an image’s contents before deciding to deploy itnot Cilium
- Mirroring images into an air-gapped or internal registrynot 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
Skopeo
- Single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
- Command syntax with transport prefixes such as docker:// is unusual and trips people up initially
- Documentation is sparse compared with the rest of the container ecosystem
Pricing, plan by plan
Cilium
Free- CiliumFree
- Full functionality
- No usage limits
- Community support
Skopeo
Free- SkopeoFree
- Full functionality
- No usage limits
- Community support
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.
Choose Skopeo if
- You need remote inspection.
- You want to start without paying.
- You work on Linux, macOS.
- You also want registry-to-registry copy.
Questions people ask
- Is Cilium or Skopeo better?
- Neither clearly leads. Cilium starts at Free and Skopeo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cilium or Skopeo?
- Cilium starts at Free and Skopeo at Free.
- Does Cilium or Skopeo run on more platforms?
- Cilium runs on Kubernetes, Linux. Skopeo runs on Linux, macOS.
- 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 Skopeo is typically brought in for.
- What can Cilium do that Skopeo cannot?
- Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Skopeo covers Remote inspection, Registry-to-registry copy, Format conversion, Image signing.
Answered from the vendors’ own pages
Cilium: Is Cilium free?
Yes, open source and CNCF-graduated. Isovalent sells an enterprise distribution and support.
Skopeo: Is Skopeo free?
Yes, open source with no licence fee.
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.
Skopeo: Why copy images without pulling them?
A registry-to-registry copy avoids downloading and re-uploading gigabytes, which is faster and much cheaper on bandwidth in CI.
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.
Skopeo: Can Skopeo run containers?
No. It only inspects, copies, signs and deletes images. Running them is Podman’s or Docker’s job.
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