What is Envoy Proxy? Envoy Proxy is a modern open-source edge and service proxy created to address core challenges in scaling, securing, and connecting microservices. Many curious engineers and architects search for 'what is Envoy Proxy' to understand how its unique architecture and features support robust cloud-native applications and service mesh deployments.

How Does Envoy Proxy Compare to Other Proxies?

Envoy Proxy distinguishes itself from traditional solutions such as NGINX and HAProxy through its focus on observability, dynamic configuration, and extensibility. Unlike legacy load balancers that are often difficult to configure and lack visibility into service-to-service communication, Envoy excels in modern environments by offering:

• Advanced telemetry for deep observability
• Dynamic APIs for on-the-fly updates without restarts
• Extensibility through filters and support for WebAssembly

This makes Envoy particularly suited to orchestrated environments like Kubernetes, and it is frequently chosen as the data plane for service meshes—such as Istio—due to its resilience, scalability, and active open-source community. For a deeper dive into Envoy's architectural approach, visit the official Solo.io Envoy Proxy resource page.

Frequently Asked Questions About Envoy Proxy

What makes Envoy Proxy cloud-native?

Envoy Proxy was specifically designed with cloud-native principles in mind, including distributed systems support, minimal coupling to application services, and service discovery. Its API-driven, decentralized configuration model and lightweight footprint make it a foundational technology in Kubernetes and service mesh environments.

Who uses Envoy Proxy?

Envoy is used by organizations of all sizes, from startups to large enterprises, to solve challenges in API gateway management, Kubernetes ingress, and microservices communication. Its adoption is widespread across companies seeking advanced networking capabilities in the cloud-native landscape.

Where can I learn more or get started with Envoy Proxy?

You can start learning Envoy basics at Solo Academy or explore kgateway—Solo.io’s Envoy Proxy-based API gateway. More in-depth resources are available on the Envoy Proxy topic page and the official Envoy website.

What Is Envoy Proxy?

What is Envoy Proxy and why do cloud-native environments rely on it? Envoy Proxy is an open-source, high-performance edge and service proxy designed for modern, cloud-native applications. As organizations transition to microservices architectures, a reliable Layer 7 (application layer) proxy becomes essential. Envoy Proxy offers observability, resiliency, and advanced routing, making interactions with large networks of microservices seamless and secure.

Originally created by Lyft and now a graduated project within the Cloud Native Computing Foundation (CNCF), Envoy Proxy functions similarly to other software load balancers like NGINX and HAProxy, but stands out for its extensibility, modern architecture, and strong open-source community.

Get started and learn the fundamentals of Envoy Proxy

Envoy Proxy Architecture

Envoy Proxy is an independent executable deployed alongside applications and supports any programming language. It acts as an L3/L4 proxy with pluggable filters and connects various TCP/UDP proxy processes. HTTP L7 filters and TLS termination are also supported, vital for cloud-native and Kubernetes-based workloads. Envoy offers advanced load balancing, circuit breaking, auto-retry, and dynamic configuration via APIs.

Its architecture features a multi-threaded model with a primary thread for orchestration and multiple worker threads for traffic processing. Each new connection is assigned to a worker thread, maximizing performance and scalability. For optimal throughput, Envoy is commonly configured with the number of worker threads matching system hardware threads.

Envoy Proxy with kgateway and Solo Enterprise for Istio

As a data plane, Envoy can serve multiple important functions:

• Proxy for Istio Service Mesh
• Kubernetes Ingress
• API-GW
• Integrate with WebAssembly
• Integrate with GraphQL

Envoy has proven highly scalable and flexible in Kubernetes and cloud-native environments. That is why Solo.io chose Envoy as the data plane for kgateway (open source, free forever), Solo Enterprise for kgateway, and Solo Enterprise for Istio. One Envoy-based stack covers gateway and mesh use cases.

Get started with kgateway (open source, free)