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Cloud · head to head

Serverless Framework vs Cilium

Serverless Framework logo

Serverless Framework

Cloud

Build and deploy serverless applications on AWS Lambda

From
Free
Rated
-
Full reviewWebsite
Cilium logo

Cilium

Cloud

eBPF-based networking, observability and security for Kubernetes

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Serverless Framework exclusive to AWS Lambda - no support for other cloud providers; Cilium requires a recent Linux kernel, which rules out older distributions and some managed environments
  • They diverge on capability: Serverless Framework covers YAML configuration, Cilium covers eBPF datapath.

Where they differ

Only the attributes on which Serverless Framework and Cilium actually diverge.

Attributes where Serverless Framework and Cilium differ
AttributeServerless FrameworkCilium
Pricing modelUnknownOpen source, no licence fee
PlatformsAWS Lambda, AWS API Gateway, AWS CloudFormationKubernetes, Linux

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 Serverless Framework

  • YAML configuration
  • Single command deployment
  • Extensible plugin ecosystem
  • Multi-language support
  • Unified dashboard
  • Built-in metrics and alerts

Only in Cilium

  • eBPF datapath
  • Identity-based policy
  • Hubble observability
  • Sidecar-free mesh

What people use each for

The jobs each tool is most often brought in to do.

Serverless Framework

  • Deploying APIs and microservices to AWS Lambdanot Cilium
  • Building event-driven applications with serverless functionsnot Cilium
  • Managing multi-language serverless projectsnot Cilium

Cilium

  • Kubernetes networking at a scale where iptables-based CNI performance degradesnot Serverless Framework
  • Network policy expressed on workload identity rather than fragile IP rulesnot Serverless Framework
  • Seeing which services actually talk to each other, and what policy is droppingnot Serverless Framework

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Serverless Framework

  • Exclusive to AWS Lambda - no support for other cloud providers
  • Paid tier requires credit system that can be confusing for budgeting
  • Plugin ecosystem quality varies significantly

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

Pricing, plan by plan

Serverless Framework

Free
  • FreeFree
    • For organizations with under $2M annual revenue
    • All Framework features included
  • Pay-As-You-Go$4/credit
    • 1 credit = 1 Service Instance or 50K Traces or 4M Metrics
    • Standard rate for larger organizations
  • Reserved Credits$1/credit
    • Discounts up to 74% off (1-year), 77% off (2-year), 80% off (3-year)
    • Additional 10% off for upfront payment

Cilium

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

Which should you pick?

Choose Serverless Framework if

  • You need yaml configuration.
  • You want to start without paying.
  • You work on AWS Lambda, AWS API Gateway, AWS CloudFormation.
  • You also want single command deployment.
Serverless Framework review

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

Questions people ask

Is Serverless Framework or Cilium better?
Neither clearly leads. Serverless Framework starts at Free and Cilium at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Serverless Framework or Cilium?
Serverless Framework starts at Free and Cilium at Free.
Does Serverless Framework or Cilium run on more platforms?
Serverless Framework runs on AWS Lambda, AWS API Gateway, AWS CloudFormation. Cilium runs on Kubernetes, Linux.
Can I use Serverless Framework for free?
Both have a free tier, so you can try either at no cost before committing.
What is Serverless Framework best used for?
Serverless Framework is most often used for deploying apis and microservices to aws lambda, building event-driven applications with serverless functions, managing multi-language serverless projects. Of those, deploying apis and microservices to aws lambda and building event-driven applications with serverless functions are not what Cilium is typically brought in for.
What can Serverless Framework do that Cilium cannot?
Serverless Framework covers YAML configuration, Single command deployment, Extensible plugin ecosystem, Multi-language support. Cilium covers eBPF datapath, Identity-based policy, Hubble observability, Sidecar-free mesh.

Answered from the vendors’ own pages

Serverless Framework: When do I have to pay for Serverless Framework?

The Serverless Framework CLI v4+ is free for organizations earning under $2 million annually. Organizations earning more must purchase credits at $4 per credit standard rate or reserved credits starting at $1 per credit with volume discounts.

Source
Cilium: Is Cilium free?

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

Serverless Framework: What cloud providers does Serverless Framework support?

Serverless Framework is exclusive to AWS Lambda. It does not support other cloud providers like Azure or Google Cloud.

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.

Serverless Framework: What does one credit cover?

One credit equals 1 Service Instance, 50,000 Traces, or 4 Million Metrics.

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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