Fly.io vs Envoy
Side-by-side comparison of AI visibility scores, market position, and capabilities
Chicago global edge cloud platform deploying apps across 35+ regions in Firecracker microVMs; $111M EQT-backed at $11.2M revenue competing with Render and Cloudflare Workers for developer infrastructure.
About
Fly.io is a Chicago-based cloud infrastructure platform enabling developers to deploy and run containerized applications globally at the network edge — distributing applications across 35+ regions worldwide so user requests route to the nearest data center, reducing latency compared to single-region cloud deployments. Founded in 2017 by Kurt Mackey and backed with $111 million raised including a $70 million round led by EQT Ventures in July 2023, Fly.io achieved $11.2 million in revenue in 2024 (up from $7.6 million in 2023) with 72 employees, serving developers and startups building latency-sensitive applications that benefit from geographic distribution.
CNCF-graduated cloud-native proxy powering Istio and AWS App Mesh service meshes; 2025 AI Gateway v0.1 enabling AI API traffic management competing with NGINX in Kubernetes.
About
Envoy is the most widely deployed cloud-native proxy, originally developed at Lyft and now a Cloud Native Computing Foundation (CNCF) graduated project since November 2018 — serving as the default sidecar proxy in Istio, Open Service Mesh, AWS App Mesh, and other service meshes, as well as the foundational technology behind many commercial API gateways and edge proxy products. Envoy processes traffic for millions of microservices globally, handling load balancing, service discovery, observability, and traffic management at the infrastructure layer.\n\nEnvoy's architecture as a high-performance, extensible proxy has made it the de facto standard for cloud-native network infrastructure — its xDS API for dynamic configuration allows platforms like Istio to manage Envoy configurations at scale without restarting proxies, while its rich observability (distributed tracing, detailed metrics) makes it essential for understanding microservices traffic patterns. Envoy Gateway 1.1 (released August 2024) added support for the Kubernetes Gateway API v1.1, standardizing how Kubernetes workloads expose services externally.\n\nIn February 2025, Envoy reached another milestone: the first stable open-source AI Gateway (v0.1), developed by Bloomberg and Tetrate and backed by CNCF, was built on Envoy to provide unified access management, rate limiting, and observability for AI model APIs — positioning Envoy as infrastructure for AI application traffic alongside traditional microservices traffic. Envoy competes with NGINX and HAProxy for traditional proxy workloads but has largely displaced them in Kubernetes and cloud-native environments. The 2025 strategy focuses on the AI gateway use case, continued Kubernetes Gateway API adoption, and the commercial ecosystem of Envoy-based products (Tetrate, Solo.io, and others) that fund ongoing development.
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