labstack/echo

Echo is a high-performance, minimalist web framework for the Go programming language. It is designed for building RESTful APIs and web services that need to be fast and flexible without a lot of built-in opinions about how your application should be structured. The framework centers on a fast HTTP router that handles URL routing, mapping incoming HTTP requests like GET /users/123 to the function that should respond. Echo optimizes this routing by intelligently prioritizing competing route patterns. On top of routing, it provides a middleware system where you can attach layers of functionality to your request-handling pipeline: logging every request, recovering from unexpected crashes without crashing the server, handling authentication, compressing responses, and so on. Middleware can be applied globally to all routes, to a group of related routes, or to individual routes. For building APIs, Echo includes helpers for automatically parsing JSON, XML, or form data from request bodies into Go structs (called data binding), and for sending various kinds of responses including JSON, HTML, files, and streaming data. It handles errors centrally so you can define consistent error responses in one place rather than repeating error-handling logic throughout your handlers. It supports HTTP/2 for better performance and can automatically manage TLS (HTTPS) certificates via Let's Encrypt. You would choose Echo for a Go backend project where you want a lean, unopinionated framework that is easy to reason about and has excellent routing performance. It pairs well with microservice architectures where you want tight control over what the framework includes. The ecosystem includes official middleware packages for JWT authentication, session management, OpenTelemetry tracing, and Prometheus metrics. Echo is written in Go, installable via Go modules, and currently on version 5.