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Cloud · head to head

Linkerd vs Ory Kratos

Linkerd logo

Linkerd

Cloud

Lightweight service mesh for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Ory Kratos logo

Ory Kratos

Cybersecurity

Headless identity and user management API

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Linkerd deliberately fewer features than Istio, so complex routing and multi-cluster policy can hit its limits; Ory Kratos headless means you build every screen, which is significant work compared with a hosted login page
  • They diverge on capability: Linkerd covers Automatic mutual TLS, Ory Kratos covers Headless API.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Linkerd and Ory Kratos actually diverge.

Attributes where Linkerd and Ory Kratos differ
AttributeLinkerdOry Kratos
Pricing modelOpen source, no licence feeOpen-source self-hosted, with a paid managed network
PlatformsKubernetes, LinuxLinux, Docker, Kubernetes, Self-hosted
CategoryCloudCybersecurity

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 Linkerd

  • Automatic mutual TLS
  • Golden metrics
  • Rust micro-proxy
  • Traffic policy

Only in Ory Kratos

  • Headless API
  • Self-service flows
  • Multi-factor authentication
  • Pluggable identity schemas

What people use each for

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

Linkerd

  • Adding mutual TLS between services to satisfy a compliance requirementnot Ory Kratos
  • Getting per-service latency and success rates without instrumenting applicationsnot Ory Kratos
  • Progressive delivery with traffic splitting during rolloutsnot Ory Kratos

Ory Kratos

  • Products needing complete control over the look and flow of authenticationnot Linkerd
  • Applications that must not hand user identity data to a third partynot Linkerd
  • Teams building identity as infrastructure across several servicesnot Linkerd

Where each one falls short

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

Linkerd

  • Deliberately fewer features than Istio, so complex routing and multi-cluster policy can hit its limits
  • Kubernetes only, with no story for workloads outside a cluster
  • A sidecar per pod is still real memory and latency overhead, however small, and a mesh is another layer to debug during incidents

Ory Kratos

  • Headless means you build every screen, which is significant work compared with a hosted login page
  • More moving parts than a monolithic IAM: Kratos handles identity, and OAuth2 needs Ory Hydra alongside
  • Documentation assumes real familiarity with identity concepts and is not a gentle introduction
  • Self-hosting identity carries the security and availability burden that hosted providers absorb

Pricing, plan by plan

Linkerd

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

Ory Kratos

Free
  • Self-hostedFree
    • Full identity server
    • All flows
    • Community support

Which should you pick?

Choose Linkerd if

  • You need automatic mutual tls.
  • You want to start without paying.
  • You work on Kubernetes, Linux.
  • You also want golden metrics.
Linkerd review

Choose Ory Kratos if

  • You need headless api.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want self-service flows.
Ory Kratos review

Questions people ask

Is Linkerd or Ory Kratos better?
Neither clearly leads. Linkerd starts at Free and Ory Kratos at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Linkerd or Ory Kratos?
Linkerd starts at Free and Ory Kratos at Free.
Does Linkerd or Ory Kratos run on more platforms?
Linkerd runs on Kubernetes, Linux. Ory Kratos runs on Linux, Docker, Kubernetes, Self-hosted.
Can I use Linkerd for free?
Both have a free tier, so you can try either at no cost before committing.
What is Linkerd best used for?
Linkerd is most often used for adding mutual tls between services to satisfy a compliance requirement, getting per-service latency and success rates without instrumenting applications, progressive delivery with traffic splitting during rollouts. Of those, adding mutual tls between services to satisfy a compliance requirement and getting per-service latency and success rates without instrumenting applications are not what Ory Kratos is typically brought in for.
What can Linkerd do that Ory Kratos cannot?
Linkerd covers Automatic mutual TLS, Golden metrics, Rust micro-proxy, Traffic policy. Ory Kratos covers Headless API, Self-service flows, Multi-factor authentication, Pluggable identity schemas.

Answered from the vendors’ own pages

Linkerd: Is Linkerd free?

The open-source project is free. Buoyant, its maintainer, sells enterprise distributions and support separately.

Ory Kratos: Is Ory Kratos free?

Yes, open source and free to self-host. Ory Network is a paid managed service.

Linkerd: Linkerd or Istio?

Linkerd trades features for simplicity, with a smaller proxy and far less configuration. Istio is more capable and correspondingly more work to run.

Ory Kratos: What does headless mean here?

Kratos provides identity flows as APIs and no user interface. You build the login, registration and recovery screens yourself.

Linkerd: Do I need a service mesh at all?

Only if you need mutual TLS, uniform retries or per-service traffic metrics across many services. For a handful of services it is usually more machinery than the problem justifies.

Ory Kratos: Does Kratos do OAuth2?

No. Kratos handles user identity; OAuth2 and OpenID Connect provider functionality is Ory Hydra, a separate component.

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