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Cloud · head to head

Cilium vs Restic

Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Restic logo

Restic

Backup

Fast, secure, and efficient backup program

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; Restic cold storage is not natively supported; restoring from S3 Glacier and S3 Glacier Deep Archive is only available as an experimental feature behind a feature flag
  • They diverge on capability: Cilium covers eBPF datapath, Restic covers Content-defined chunking.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cilium and Restic actually diverge.

Attributes where Cilium and Restic differ
AttributeCiliumRestic
Pricing modelOpen source, no licence feefree
PlatformsKubernetes, LinuxWindows, Mac, Linux
CategoryCloudBackup
FoundedUnknown2014

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 Restic

  • Content-defined chunking
  • Cryptographic verification
  • Deduplication
  • Encryption
  • Multiple backends
  • Snapshot management
  • AWS S3
  • Azure

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 Restic
  • Network policy expressed on workload identity rather than fragile IP rulesnot Restic
  • Seeing which services actually talk to each other, and what policy is droppingnot Restic

Restic

  • Encrypted deduplicated backups to S3, B2, SFTP and local disk from the command linenot Cilium
  • Scripted server backups with snapshot retention policiesnot 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

Restic

  • Cold storage is not natively supported; restoring from S3 Glacier and S3 Glacier Deep Archive is only available as an experimental feature behind a feature flag
  • A Windows file whose name contains a character Windows treats as invalid cannot be read by restic and has to be renamed
  • Antivirus real-time protection degrades performance on Windows unless the restic binary is added to an exclusions list
  • On large repositories the built-in five minute stuck-request timeout fires during file listing and has to be raised manually with --stuck-request-timeout

Pricing, plan by plan

Cilium

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

Restic

Free
  • FreeFree
    • Content-defined chunking
    • Encryption
    • Multiple backends

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 Restic if

  • You need content-defined chunking.
  • You want to start without paying.
  • You work on Windows, Mac, Linux.
  • You also want cryptographic verification.
Restic review

Questions people ask

Is Cilium or Restic better?
Neither clearly leads. Cilium starts at Free and Restic at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cilium or Restic?
Cilium starts at Free and Restic at Free.
Does Cilium or Restic run on more platforms?
Cilium runs on Kubernetes, Linux. Restic runs on Windows, Mac, Linux.
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 Restic is typically brought in for.
What can Cilium do that Restic cannot?
Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Restic covers Content-defined chunking, Cryptographic verification, Deduplication, Encryption.

Answered from the vendors’ own pages

Cilium: Is Cilium free?

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

Restic: How much does restic cost?

Restic is entirely free to use and completely open source. There are no subscription tiers, paid plans, or licensing costs.

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.

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.

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