Istio vs Zscaler Microsegmentation

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.

Zscaler Microsegmentation has no write-up on Specifiction yet; its figures are above.