Fiber

Fiber is Express.js rewritten in Go, and the performance numbers show why people bother. Nearly 12 million responses per second vs. Express's 1.2 million. Same familiar routing API — if you've written Express middleware, Fiber's syntax will feel like home — but with Go's concurrency and type safety underneath.

Gin is Go's most popular framework with the biggest ecosystem. Echo offers more built-in middleware. Chi is the minimalist's router. Express itself is the JavaScript original.

Use Fiber if you're a JavaScript developer moving to Go and want the shortest learning curve. The Express-like API genuinely reduces friction. Built on FastHTTP for maximum throughput. MIT-licensed, 39K stars.

The catch: FastHTTP isn't fully compatible with Go's standard net/http package. Some net/http middleware won't work without adaptation, and the request/response objects are different. Gin and Echo don't have this problem. If Go ecosystem compatibility matters more than raw speed, Gin is the safer pick.