Fastify
High-performance Node.js web framework with a schema-based approach — significantly faster than Express with built-in JSON schema validation.
MIT
TypeScript
Why Fastify?
Performance-critical Node.js APIs where Express is a bottleneck
JSON-heavy APIs that benefit from schema-validated serialization
Teams who want Express familiarity with far better performance
Signal Breakdown
What drives the Trust Score
Download Trend
Last 12 months
Tradeoffs & Caveats
Know before you commitEdge runtimes — use Hono instead
Large structured apps — NestJS provides better architecture guardrails
Pricing
Free tier & paid plans
Open source, free to use
Free & open-source
Alternative Tools
Other options worth considering
Progressive Node.js framework for building scalable server-side apps — Angular-inspired architecture with decorators, DI, and a rich module ecosystem.
Ultra-fast, lightweight web framework for the edge — runs on Cloudflare Workers, Deno, Bun, and Node.js with a familiar Express-like API.
Often Used Together
Complementary tools that pair well with Fastify
Learning Resources
Docs, videos, tutorials, and courses
Get Started
Repository and installation options
View on GitHub
github.com/fastify/fastify
npm install fastifyQuick Start
Copy and adapt to get going fast
import Fastify from 'fastify';
const app = Fastify({ logger: true });
app.get('/', async (request, reply) => {
return { hello: 'world' };
});
await app.listen({ port: 3000 });Community Notes
Real experiences from developers who've used this tool