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Cloud · head to head

Cilium vs Linear

Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Linear logo

Linear

Technology

The issue tracking tool you'll enjoy using

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; Linear no task-level Gantt chart; Timeline view is available for projects only, not individual issues
  • They diverge on capability: Cilium covers eBPF datapath, Linear covers Fast, real-time sync.

Where they differ

Only the attributes on which Cilium and Linear actually diverge.

Attributes where Cilium and Linear differ
AttributeCiliumLinear
Pricing modelOpen source, no licence feeUnknown
PlatformsKubernetes, LinuxWeb, iOS, Android, macOS, Windows
CategoryCloudTechnology
FoundedUnknown2019

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 Linear

  • Fast, real-time sync
  • Keyboard-first design
  • Automatic issue tracking
  • Cycles (sprints)
  • Projects & milestones
  • Custom workflows
  • API & webhooks
  • Built-in roadmaps

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

Linear

  • Issue management and triage, converting customer feedback into prioritized issuesnot Cilium
  • Strategic planning via initiatives, roadmaps, and PRDs from idea to launchnot Cilium
  • Agent-assisted development, with agents drafting docs and submitting pull requestsnot Cilium
  • Code review with structural diffs for human and agent outputnot Cilium
  • Progress monitoring via dashboards tracking cycle times and project healthnot 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

Linear

  • No task-level Gantt chart; Timeline view is available for projects only, not individual issues
  • No native time-tracking or hour-logging feature
  • No native Linux desktop app; official FAQ states it 'may come in the future but it's not on the roadmap for now'
  • Free tier capped at 250 issues and 2 teams

Pricing, plan by plan

Cilium

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

Linear

Free
  • FreeFree
    • Unlimited members
    • 2 teams
    • 250 issues
  • Basic$10/month
    • 5 teams
    • Unlimited issues
    • Unlimited file uploads
  • Business$16/month
    • Unlimited teams
    • Private teams/guests
    • Triage Intelligence
  • Enterprise$undefined/month
    • SAML/SCIM
    • Granular admin controls
    • Invoice/PO billing

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 Linear if

  • You need fast, real-time sync.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows.
  • You also want keyboard-first design.
Linear review

Questions people ask

Is Cilium or Linear better?
Neither clearly leads. Cilium starts at Free and Linear at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cilium or Linear?
Cilium starts at Free and Linear at Free.
Does Cilium or Linear run on more platforms?
Cilium runs on Kubernetes, Linux. Linear runs on Web, iOS, Android, macOS, Windows.
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 Linear is typically brought in for.
What can Cilium do that Linear cannot?
Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Linear covers Fast, real-time sync, Keyboard-first design, Automatic issue tracking, Cycles (sprints).

Answered from the vendors’ own pages

Cilium: Is Cilium free?

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

Linear: How much does Linear cost?

Linear has a free tier supporting 2 teams and 250 issues. Paid plans start at $10 per user per month for Basic and $16 per user per month for Business. Annual billing is required for paid tiers.

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.

Linear: What are the file upload limits on Linear?

The free tier is restricted to 10MB file uploads per team. Paid plans offer unlimited file uploads.

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.

Linear: Does Linear offer an Enterprise plan?

Yes, Linear offers an Enterprise tier with custom pricing, annual billing required, SAML and SCIM support, granular admin controls, and priority support.

Source
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