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Cloud · head to head

Cilium vs Consul

Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Consul logo

Consul

Networking

Service discovery, networking, and security

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; Consul namespaces, admin partitions and other multi tenancy controls are Consul Enterprise only
  • They diverge on capability: Cilium covers eBPF datapath, Consul covers Service discovery.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cilium and Consul actually diverge.

Attributes where Cilium and Consul differ
AttributeCiliumConsul
Pricing modelOpen source, no licence feeopen-source
PlatformsKubernetes, LinuxLinux, Windows, Mac, Cloud
CategoryCloudNetworking
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 Consul

  • Service discovery
  • Health checking
  • Key/value store
  • Multi-datacenter
  • DNS interface
  • Service mesh
  • Load balancing
  • Configuration management

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

Consul

  • Service discovery and health checking across dynamic infrastructurenot Cilium
  • Running a service mesh with mutual TLS between servicesnot Cilium
  • Distributed key value configuration storage for applicationsnot 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

Consul

  • Namespaces, admin partitions and other multi tenancy controls are Consul Enterprise only
  • Audit logging, OIDC authentication and FIPS 140-2 builds require Consul Enterprise, so compliance driven deployments cannot use the free edition
  • Automated backups, redundancy zones, read replicas and automated server upgrades are Enterprise only
  • Long Term Support releases are Enterprise only, so community users must upgrade to stay supported
  • Service mesh and advanced traffic management sit in the Premium Enterprise tier above Standard Enterprise
  • HashiCorp does not publish a Consul rate on its pricing page, which lists per resource prices for Terraform instead

Pricing, plan by plan

Cilium

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

Consul

Free
  • Open SourceFree
    • Service discovery
    • Health checking
    • KV store

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 Consul if

  • You need service discovery.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Cloud.
  • You also want health checking.
Consul review

Questions people ask

Is Cilium or Consul better?
Neither clearly leads. Cilium starts at Free and Consul at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cilium or Consul?
Cilium starts at Free and Consul at Free.
Does Cilium or Consul run on more platforms?
Cilium runs on Kubernetes, Linux. Consul runs on Linux, Windows, Mac, Cloud.
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 Consul is typically brought in for.
What can Cilium do that Consul cannot?
Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Consul covers Service discovery, Health checking, Key/value store, Multi-datacenter.

Answered from the vendors’ own pages

Cilium: Is Cilium free?

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

Consul: How much does Consul cost?

Consul does not publish specific pricing. The open source Community edition is free. HashiCorp also offers a Consul Enterprise edition, but pricing details are not disclosed publicly and must be obtained by contacting HashiCorp sales.

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.

Consul: Is Consul open source?

Consul includes a free, open source Community edition. HashiCorp also offers a proprietary Enterprise edition for organizations requiring advanced features, but no public pricing is available for the Enterprise version.

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.

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