Python for Backend Development: FastAPI vs Django vs Flask in 2024

The Python Backend Landscape#

Python has three major web frameworks. Each has distinct strengths.

FastAPI#

from fastapi import FastAPIfrom pydantic import BaseModel​app = FastAPI()​class UserCreate(BaseModel):    name: str    email: str​@app.post("/users")async def create_user(user: UserCreate):    return {"id": 1, **user.model_dump()}

• Fastest of the three

• Type hints drive validation and docs

• Automatic OpenAPI documentation

• Native async/await

• Pydantic v2 for data validation

Performance Comparison#

• FastAPI: ~30,000 req/s

• Django: ~4,000 req/s

• Flask: ~8,000 req/s

Decision Framework#

• New API project -> FastAPI

• Admin-heavy content site -> Django

• Simple microservice -> Flask

• Data science integration -> FastAPI

• Large team, many conventions -> Django