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Fastify vs NestJS
Trust Score comparison · March 2026
Signal Comparison
3M / wknpm downloads2.5M / wk
120 commitsCommits (90d)160 commits
33k ★GitHub stars68k ★
5k q'sStack Overflow14k q's
HighCommunityHigh
FastifyNestJS
Key Differences
| Factor | Fastify | NestJS |
|---|---|---|
| License | MIT | MIT |
| Language | TypeScript | TypeScript |
| Hosted | Self-hosted | Self-hosted |
| Free tier | — | — |
| Open Source | ✓ Yes | ✓ Yes |
| TypeScript | ✓ | ✓ |
Pick Fastify if…
- 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
Pick NestJS if…
- Large TypeScript backends needing enforced architecture and testability
- Teams from Java/Spring who want familiar patterns in Node.js
- Building microservices with REST, GraphQL, or gRPC in one framework
Side-by-side Quick Start
Fastify
import Fastify from 'fastify';
const app = Fastify({ logger: true });
app.get('/', async (request, reply) => {
return { hello: 'world' };
});
await app.listen({ port: 3000 });NestJS
import { Controller, Get, Module } from '@nestjs/common';
import { NestFactory } from '@nestjs/core';
@Controller()
class AppController {
@Get() getHello() { return 'Hello World!'; }
}
@Module({ controllers: [AppController] })
class AppModule {}
async function bootstrap() {
const app = await NestFactory.create(AppModule);
await app.listen(3000);
}
bootstrap();Community Verdict
Based on upvoted notes🏆
NestJS wins this comparison
Trust Score 87 vs 83 · 4-point difference
NestJS leads on Trust Score with stronger signal data across downloads and community health. That said, the other tool is worth considering if your use case matches its specific strengths above.