Back

FastAPI vs Express.js

Trust Score comparison · March 2026

FastAPI
97
Trust
Excellent
View profile
VS
Trust Score Δ
10
🏆 FastAPI wins
Express.js
87
Trust
Good
View profile

Signal Comparison

18.4M / moPyPI downloads34M / wk
98 commitsCommits (90d)18 commits
78k ★GitHub stars65k ★
14k q'sStack Overflow146k q's
Very HighCommunityVery High
FastAPIExpress.js

Key Differences

FactorFastAPIExpress.js
LicenseMITMIT
LanguagePythonJavaScript / TypeScript
HostedSelf-hostedSelf-hosted
Free tier✓ Yes
Open Source✓ Yes✓ Yes
TypeScript

Pick FastAPI if…

  • You're building a Python REST API or microservice
  • You want automatic API docs (Swagger/OpenAPI) with zero configuration
  • You need async support and high performance for Python

Pick Express.js if…

  • You're building a Node.js REST API and want full control
  • Your team knows JavaScript/TypeScript well
  • You need a lightweight framework with a huge middleware ecosystem

Side-by-side Quick Start

FastAPI
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

class Tool(BaseModel):
    name: str
    trust_score: int
    category: str

@app.get("/tools")
async def list_tools():
    return {"tools": await db.fetch_all("SELECT * FROM tools")}

@app.post("/tools", status_code=201)
async def create_tool(tool: Tool):
    id = await db.execute("INSERT INTO tools ...", tool.dict())
    return {"id": id, **tool.dict()}

# Run: uvicorn main:app --reload
# Docs: http://localhost:8000/docs
Express.js
import express from 'express';

const app = express();
app.use(express.json());

app.get('/tools', async (req, res) => {
  const tools = await db.query(
    'SELECT * FROM tools ORDER BY trust_score DESC'
  );
  res.json(tools.rows);
});

app.post('/tools', async (req, res) => {
  const { name, category } = req.body;
  const tool = await db.insert('tools', { name, category });
  res.status(201).json(tool);
});

app.listen(3000, () => console.log('API on :3000'));

Community Verdict

Based on upvoted notes
🏆
FastAPI wins this comparison
Trust Score 97 vs 87 · 10-point difference

FastAPI 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.