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Cloud · head to head

Cilium vs Microsoft Azure

Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Microsoft Azure logo

Microsoft Azure

Cloud

Open and flexible cloud services

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; Microsoft Azure the 12 months of free services is available only to new customers who have not previously had an Azure account or received 12 months of free services
  • They diverge on capability: Cilium covers eBPF datapath, Microsoft Azure covers Virtual Machines.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cilium and Microsoft Azure actually diverge.

Attributes where Cilium and Microsoft Azure differ
AttributeCiliumMicrosoft Azure
Pricing modelOpen source, no licence feeusage-based
PlatformsKubernetes, LinuxWeb, Api, Desktop, Mobile
FoundedUnknown2010

Identical on both: starting price (Free), 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 Microsoft Azure

  • Virtual Machines
  • App Service
  • SQL Database
  • Blob Storage
  • Azure Cosmos DB
  • Functions
  • Service Fabric
  • API 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 Microsoft Azure
  • Network policy expressed on workload identity rather than fragile IP rulesnot Microsoft Azure
  • Seeing which services actually talk to each other, and what policy is droppingnot Microsoft Azure

Microsoft Azure

  • Cloud infrastructure and computingnot Cilium
  • Database and storage servicesnot Cilium
  • AI and machine learning servicesnot Cilium
  • Enterprise application hostingnot 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

Microsoft Azure

  • The 12 months of free services is available only to new customers who have not previously had an Azure account or received 12 months of free services
  • The 12 months free offer is not available to customers who sign up directly for pay as you go in China and India
  • Customers who try Azure free must move to pay as you go within 30 days to keep receiving the 12 months of free services
  • Free services are capped at specified monthly amounts, and only some of them are always free

Pricing, plan by plan

Cilium

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

Microsoft Azure

Free
  • Free AccountFree
    • $200 credit for 30 days
    • Popular services 12 months free
    • 40+ services always free

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 Microsoft Azure if

  • You need virtual machines.
  • You want to start without paying.
  • You work on Web, Api, Desktop, Mobile.
  • You also want app service.
Microsoft Azure review

Questions people ask

Is Cilium or Microsoft Azure better?
Neither clearly leads. Cilium starts at Free and Microsoft Azure at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cilium or Microsoft Azure?
Cilium starts at Free and Microsoft Azure at Free.
Does Cilium or Microsoft Azure run on more platforms?
Cilium runs on Kubernetes, Linux. Microsoft Azure runs on Web, Api, Desktop, Mobile.
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 Microsoft Azure is typically brought in for.
What can Cilium do that Microsoft Azure cannot?
Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh. Microsoft Azure covers Virtual Machines, App Service, SQL Database, Blob Storage.

Answered from the vendors’ own pages

Cilium: Is Cilium free?

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

Microsoft Azure: How much does Microsoft Azure cost?

Azure uses consumption-based pricing where you pay only for resources used and scale as you grow, with no fixed monthly fee. Prices are listed in USD globally, and pricing varies by service, region, and usage patterns.

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.

Microsoft Azure: How can I save money on Azure services?

Azure offers savings up to 65% on select compute services through Azure Savings Plans with one- or three-year commitments. Using Azure Hybrid Benefit with existing Windows Server and SQL Server licenses plus reservations can save up to 85% compared to standard rates.

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.

Microsoft Azure: Does Azure offer a free tier?

Azure provides free tier services for new users and perpetually free options, including free Spot Virtual Machines, dev/test pricing for development workloads, and access to the Azure Pricing Calculator to estimate monthly costs before deployment.

Source
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