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Istio

istio.io

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Spec score 7.7 #10 of 31 in Microsegmentation Software

What it is

Istio is a free, open-source service mesh that adds security, connectivity, and monitoring for distributed applications with few or no service-code changes. It manages HTTP, gRPC, WebSocket, and TCP traffic, with automatic load balancing, routing rules, retries, failovers, and fault injection. Deployment options include sidecar mode and ambient mode, which uses a per-node Layer 4 proxy and can optionally add a per-namespace Envoy proxy for Layer 7 features. The control plane runs on Kubernetes, while the mesh can extend to other clusters, virtual machines, and endpoints outside Kubernetes. Security capabilities include workload identity, mutual TLS, authentication, authorization policies, and audit tools. Istio can generate traffic metrics, logs, and traces, including for ingress and egress. It can be installed with istioctl or Helm, and its integrations documentation covers tools such as Prometheus, Grafana, Jaeger, Kiali, and cert-manager. Istio 1.31 supports Kubernetes versions 1.32 through 1.36. Supported releases receive critical-issue patches and technical assistance from the community; development builds have no support.

Spec sheet

What it does
Istio is an open source service mesh that adds ways to secure, connect, and monitor distributed applications with few or no service code changes.Read 29 Sep 2026 · istio.io
Integrations
Istio’s integration documentation covers cert-manager, Grafana, Jaeger, Kiali, Prometheus, SPIRE, Apache SkyWalking, Zipkin, and third-party load balancers.Read 29 Sep 2026 · istio.io
Security
Istio security features include workload identity, mutual TLS, authentication, authorization policies, and audit tools.Read 29 Sep 2026 · istio.io
Founded
2016Read 23 Sep 2026 · istio.io
Community support
For supported releases, the Istio community provides patch releases for critical issues and technical assistance; partners may offer longer-term support.Read 29 Sep 2026 · istio.io
Deployment modes
Istio supports sidecar mode and ambient mode, which uses a per-node Layer 4 proxy and optionally a per-namespace Envoy proxy for Layer 7 features.Read 29 Sep 2026 · istio.io
Extensibility
Istio uses Envoy proxies and supports extensions including WebAssembly modules and third-party policy systems.Read 29 Sep 2026 · istio.io
Installation
Istio can be installed with istioctl or Helm, and its release archive includes the istioctl binary, installation profiles, Helm charts, and samples.Read 29 Sep 2026 · istio.io
Observability
Istio can generate metrics, logs, and traces for traffic in a cluster, including ingress and egress traffic.Read 29 Sep 2026 · istio.io
Project status
Istio is a graduated Cloud Native Computing Foundation project.Read 29 Sep 2026 · istio.io
Release support window
A minor release is supported until six weeks after the N+2 minor release, and development builds have no support.Read 29 Sep 2026 · istio.io
Supported Kubernetes versions
The Istio 1.31 release supports Kubernetes versions 1.32 through 1.36.Read 29 Sep 2026 · istio.io
Traffic management
Istio supports automatic load balancing for HTTP, gRPC, WebSocket, and TCP traffic, plus routing rules, retries, failovers, and fault injection.Read 29 Sep 2026 · istio.io
Workload environments
Istio’s control plane runs on Kubernetes and the mesh can extend to other clusters, virtual machines, and endpoints outside Kubernetes.Read 29 Sep 2026 · istio.io

Plans and prices

Istio Free Open source service mesh · Releases accessible at no cost Read 29 Sep 2026 · istio.io

Every Istio plan and price →

Strong points and limits

Strong points

  • Free and open source.
  • Manages HTTP, gRPC, WebSocket, and TCP traffic.
  • Supports sidecar and ambient deployment modes.
  • Provides workload identity and mutual TLS.
  • Can generate metrics, logs, and traces for traffic.

Limits

  • The control plane runs on Kubernetes.
  • Istio 1.31 supports Kubernetes 1.32 through 1.36.
  • Development builds have no support.
  • Minor release support ends six weeks after the N+2 release.

Who it suits

Istio suits teams running distributed applications on Kubernetes that need traffic management, security, or observability features. Its mesh can also extend to virtual machines and endpoints outside Kubernetes.

Verdict

Istio combines traffic management, security, and observability, with sidecar and ambient deployment options. Check the Kubernetes version and release support window that apply to your deployment.

Where Specifiction places it

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