FastAPI vs Fastify
On the evidence we track, FastAPI leads this comparison with a composite score of 78/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for web frameworks. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
FastAPI
LeaderA Python web framework designed for creating APIs with automatic documentation, built on standard protocols and type hints to enable rapid development and deployment.
Fastify
A Node.js web framework emphasizing fast request handling and low resource consumption while maintaining strong security, input validation, and developer experience.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- OpenAPI
- OAuth2
- JWT
FastAPI
Leader- Starlette
- Pydantic
- JSON Schema
- Swagger UI
- ReDoc
- HTTP Basic authentication
- Cookies
- Session management
Fastify
- Next.js
- Apollo Server
- Angular
- PostgreSQL
- MongoDB
- Redis
- Elasticsearch
- Swagger/OpenAPI
- WebSocket
- Helmet
- Sentry
- RabbitMQ
- CORS
- CSRF
- Kubernetes
- Firebase
- Mongoose
- TypeORM
- OAuth
- GraphQL
- Swagger
- React
- Vue
- GCP Cloud Storage
- +13 more
FastAPI or Fastify: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.