cloudflare/pingora

Pingora is an open-source framework from Cloudflare for building high-performance network services and proxy servers in Rust. It's the actual technology that powers a significant part of Cloudflare's global network infrastructure, handling over 40 million internet requests per second in production. A proxy server sits between users and the actual servers delivering content, routing traffic, load balancing (distributing requests across multiple servers), applying security rules, caching content, and handling encryption. Pingora gives developers a programmable foundation for building these kinds of systems with full control over the logic. The reason Cloudflare built and open-sourced this is largely about safety and performance. Much of the internet's networking infrastructure is written in C or C++, languages where memory management bugs are a common source of security vulnerabilities. Rust (the language Pingora is built with) provides similar performance to C but with memory safety guarantees built into the language, dramatically reducing the risk of common security flaws. For most vibe coders and founders, Pingora is infrastructure-level tooling, the kind of thing large-scale companies use when building internet infrastructure that needs to handle millions of simultaneous connections reliably. It's not something you'd reach for to build a typical web app. However, it's worth knowing about if you're building a product that involves custom proxy logic, API gateways, or traffic management at significant scale, or if you're evaluating what mature Rust-based infrastructure looks like in practice.