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Tech riderRev. 29 Sept 2026

Linkerd

Ch 106.9of 20 Service Mesh Platforms
  1. 1Runs onLinux, self-hosted
  2. 2CostsFree plan
  3. 3Deployment modelself hosted
  4. 4Proxy architecturesidecar
  5. 5mTLS supportYes
  6. 6Traffic policiesYes
  7. 7Multi-cluster supportYes
  8. 8Supported platformsKubernetes
8 lines stated Written from the maker's own pages: linkerd.io
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The Linkerd homepage

Overview

Linkerd is a service mesh for Kubernetes that adds runtime debugging, observability, reliability and security without requiring changes to application code. It installs into a Kubernetes cluster and injects sidecar proxies into workload pods. The mesh handles HTTP, HTTP/2, gRPC and arbitrary TCP traffic, including TLS connections and WebSockets. It automatically enables mutual TLS between meshed applications and supports authorization policies between services. Metrics include request volume, success rates and latency distributions for HTTP, HTTP/2 and gRPC, plus TCP-level metrics. Traffic controls include load balancing, retries, timeouts, dynamic routing, traffic splitting and rate limiting. Linkerd can use Prometheus and Grafana and supports distributed tracing. Its Linkerd Viz Prometheus instance retains metrics for a short fixed interval, currently six hours, so it is intended to supplement an existing metrics store. Installation requires a modern Kubernetes cluster and a working kubectl command. The open-source project is licensed under Apache 2.0; Buoyant offers commercial support, training and architecture reviews. The listed plan is 0.00 USD per free.

Who it is for

Linkerd suits teams running workloads on Kubernetes that want service-level traffic controls, metrics and mutual TLS without application code changes. It assumes a modern cluster and functioning kubectl.

What is good

  • Adds mesh features without code changes
  • Automatically enables mutual TLS
  • Supports traffic policies including retries and rate limiting
  • Works with Prometheus and Grafana

What to know first

  • Requires a modern Kubernetes cluster
  • Included metrics retention is currently six hours

Verdict

Linkerd brings traffic management, observability and security controls to Kubernetes workloads. Its included metrics store has limited retention, so it is designed to complement an existing metrics store.

Linkerd plans and pricing

All plans
Linkerd open source Free Open source, Apache 2.0 licensed · Requires Kubernetes linkerd.io · 29 Sept 2026

Compared on service mesh platforms

Free plan
Yeslinkerd.io
Deployment model
self_hostedlinkerd.io
Proxy architecture
sidecarlinkerd.io
mTLS support
Yeslinkerd.io
Traffic policies
Yeslinkerd.io
Multi-cluster support
Yeslinkerd.io
Supported platforms
Kuberneteslinkerd.io

Facts

Product
Linkerd is a service mesh for Kubernetes that adds runtime debugging, observability, reliability, and security without requiring code changes.linkerd.io · 29 Sept 2026
Traffic support
Linkerd proxies HTTP, HTTP/2, gRPC, and arbitrary TCP traffic, including TLS connections and WebSockets.linkerd.io · 29 Sept 2026
Security
Linkerd automatically enables mutual TLS for communication between meshed applications and supports authorization policies between services.linkerd.io · 29 Sept 2026
Observability
Linkerd records request volume, success rates, and latency distributions for HTTP, HTTP/2, and gRPC traffic, plus TCP-level metrics.linkerd.io · 29 Sept 2026
Metrics retention
The Prometheus instance included with Linkerd Viz retains metrics for a short fixed interval, currently six hours, and Linkerd is designed to supplement an existing metrics store.linkerd.io · 29 Sept 2026
Traffic management
Linkerd supports load balancing, retries, timeouts, dynamic request routing, traffic splitting, and rate limiting.linkerd.io · 29 Sept 2026
Integrations
Linkerd can use Prometheus and Grafana for metrics and dashboards, and supports distributed tracing.linkerd.io · 29 Sept 2026
Deployment
Linkerd is installed into a Kubernetes cluster and adds its data plane to workloads by injecting proxies into their pods.linkerd.io · 29 Sept 2026
Requirements
Linkerd requires a modern Kubernetes cluster and a functioning kubectl command for installation.linkerd.io · 29 Sept 2026
Proxy
Linkerd’s ultralight Linkerd2-proxy is written in Rust and designed specifically for the service mesh sidecar use case.linkerd.io · 29 Sept 2026
Security audit
Linkerd says it completed its 2024 security audit, which included penetration testing and white-box testing.linkerd.io · 29 Sept 2026
Commercial support
Buoyant offers 24x7 enterprise support, training, and architectural reviews for Linkerd.linkerd.io · 29 Sept 2026
Enterprise distribution
Buoyant Enterprise for Linkerd lists a FIPS-compliant distribution with full L7 visibility and network encryption, authentication, and authorization.linkerd.io · 29 Sept 2026
Governance
Linkerd is a CNCF graduated project licensed under Apache 2.0.linkerd.io · 29 Sept 2026

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