22nd of 45 in Backend and cloud templates
fiber
Express-style HTTP web framework for Go, built on fasthttp
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- Stars
- 40.3k
- License
- MIT
- Last commit
- Nov 2026
- Last release
- Nov 2026
- Language
- Go
39,249 on 21 Apr 202640,271 on 10 Nov 2026
From GitHub's daily star counts.
Checked on GitHub.
Overview
Fiber is a Go web framework with an Express-like API for routing, middleware and handlers, running on top of fasthttp. It ships middleware for static files, logging, CORS and rate limiting, plus WebSocket, Socket.io and Server-Sent Events support, and can adapt net/http handlers. It is a general backend framework, not an AI project.
Who it is for: Go developers building HTTP APIs and web backends
Strengths
- Express-like routing, groups and middleware chain, familiar to Node.js developers
- Built-in middleware for static files, logger, CORS, rate limiter, plus WebSocket and SSE
- Runs net/http handlers directly and has an adaptor middleware for net/http middleware
- Zero-allocation design on fasthttp, with TechEmpower benchmark results published
Weaknesses
- fiber.Ctx values are reused across requests, so keeping references after the handler returns is unsafe
- Uses unsafe, so it may lag behind the newest Go releases
- Requires Go 1.26 or higher for v3
- Adapted net/http handlers lose fiber.Ctx features and add compatibility overhead
What it needs
- Go
- Needs Go 1.26+, fasthttp
Quick answers
Is fiber open source?
Yes. Its code is on GitHub under the MIT license.
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