Istio Reviews & Product Details

I use Istio to secure east-west traffic between my microservices, ensuring that only legitimate traffic flows between them and blocking unwanted traffic. I appreciate that it enables mutual TLS, providing additional security. I like the way Istio allows connectivity between microservices, especially as we transition from traditional three-tier web architecture to microservices architecture. It also offers both security and tracing capabilities, which are crucial. Also, while Kiali was helpful before, now I find Jaeger does a great job. Review collected by and hosted on G2.com.

Initially, Istio was not easy to set up. Also, the way Istio injected the Envoy proxy into every microservice was hogging the microservices and caused high resource utilization. They could also work on simplifying the complexity, similar to how Linkerd is. Review collected by and hosted on G2.com.

What engineers love about Istio in 2026 is how it moves complex networking logic out of the application code and into the infrastructure layer transparently.

Zero-Trust Security & Observability: It provides automatic mTLS encryption and deep "Golden Signal" metrics (latency, errors, traffic) for every service-to-service interaction without touching a single line of your code.

Ambient Mode Efficiency: The shift to sidecar-less "Ambient Mode" significantly reduces resource overhead and operational friction, finally making enterprise-grade traffic management lightweight and easy to maintain. Review collected by and hosted on G2.com.

Its primary drawback is the crushing operational complexity and steep learning curve required to manage its vast array of Custom Resource Definitions (CRDs) and troubleshooting layers.

The significant resource overhead of sidecar proxies—injecting extra CPU/RAM usage and millisecond latency—can become a "service mesh tax" that outweighs benefits for smaller architectures. Review collected by and hosted on G2.com.

With Istio Kubernetes operator, it is easy to deploy in any Kubernetes cluster, providing end-to-end traffic visibility and core features like traffic management and security. The Istio sidecar proxy container will be injected into the pod without any modification to the application we run. Review collected by and hosted on G2.com.

Due to Istio installation, there is an additional overload to the cluster in terms of resource availability, but that justifies the performance and use case. Review collected by and hosted on G2.com.

Managing microservices

Traffic Forwarding

Service Discovery Review collected by and hosted on G2.com.

The complexity of kube-proxy route forwarding function in each pod increasing response latency — due to more hops when the sidecar intercepts the traffic and consuming more resources Review collected by and hosted on G2.com.

Istio with Kubernetes sidecar will make the micro-service service discovery go to the next level.

It comes with the following logging tools pre-configured with,

1. Prometheus

2. Jaegar

3. Kiali

4. Grafana

It supports advance newtwork traffing control,

1. dns routing with conditions

2. traffic limiting for micro-service

3. mutal tls between micro service to micro service Review collected by and hosted on G2.com.

Istio is not a light service discovery; the learning curve is steep. Review collected by and hosted on G2.com.

I like traffic management, rate limiting via Envoy proxy, fault injection, circuit breaking, request routing, etc. Review collected by and hosted on G2.com.

Istio should be compatible with other ingress controllers, right now it's only Istio gateway. Adoption is also very slow. Moreover, Istio should come as an add-on to Kubernetes cluster. Moreover, managing Istio is an overhead, App Mesh from AWS is a better-managed solution. Review collected by and hosted on G2.com.

Traffic Management and security would be the top two features out of the many available. Review collected by and hosted on G2.com.

A little complicated to set up if you are not well versed with the specific terminology used by the tool. Review collected by and hosted on G2.com.

Gives insight into network performance. Manages traffic with ease. Simplifies load balancing. Easily deploy applications using Kubernetes. Review collected by and hosted on G2.com.

Setting up is difficult. Time consuming to set up the complete process. Requires a high level understanding of microservice architecture. Review collected by and hosted on G2.com.

tracing, traffic management, and fault injection Review collected by and hosted on G2.com.

The deployment is a bit tricky on a private GKE cluster with NAT gateway Review collected by and hosted on G2.com.

The concept of istio inwhich it provides circuit breaking and load balancing on top of k8s network and pod management Review collected by and hosted on G2.com.

Can only work with predefined services. Does not work for round robin load distribution. Does not work for more complex scenarios with databases with direct ip connections Review collected by and hosted on G2.com.