Fastify

Web framework for Node.js designed to deliver high performance with minimal overhead.

Overview

Fastify is a web framework for Node.js designed to deliver high performance with minimal overhead. Built from the ground up with developer experience in mind, it combines the best practices from frameworks like Hapi and Express while achieving some of the fastest request handling in the ecosystem—capable of serving up to 30,000 requests per second depending on code complexity.

The framework emphasizes extensibility through hooks, plugins, and decorators, making it easy to build scalable applications. Fastify includes built-in support for JSON Schema validation, TypeScript, and structured logging via Pino, allowing developers to write secure, well-validated code without sacrificing performance.

With over 10 million monthly downloads and backing from the OpenJS Foundation, Fastify powers a large ecosystem of organizations and products. It offers comprehensive documentation, an active community, and a growing plugin ecosystem with 297+ available plugins.

Key features

High performance (30k req/s)
Plugin architecture
JSON Schema validation
TypeScript support
Structured logging with Pino
Request/response hooks
Extensible via decorators
CLI scaffolding tool

Pros

Extremely fast request handling
Minimal overhead and resource usage
Powerful plugin ecosystem (297+ plugins)
Built-in TypeScript support
Excellent developer experience
Comprehensive documentation
Active community support
Long-term support (LTS) policy

Cons

Smaller ecosystem compared to Express
Steeper learning curve than Express for beginners
Less third-party middleware available
Requires Node.js knowledge

Use this if

You need a high-performance web framework for Node.js, want built-in validation and TypeScript support, or are building microservices and APIs that require minimal latency.

Skip this if

You prefer a more established ecosystem like Express, need extensive third-party middleware out of the box, or are building simple applications where performance is not a priority.

Best for

Building high-performance REST APIsMicroservices developmentReal-time applicationsScalable Node.js backendsTypeScript projectsApplications requiring request validation

Alternatives

ExpressKoaHapiNestJSNext.js

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