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Express.js vs FastAPI
Trust Score comparison · March 2026
VS
Trust Score Δ
10
🏆 FastAPI wins
Signal Comparison
34M / wknpm downloads18.4M / mo
18 commitsCommits (90d)98 commits
65k ★GitHub stars78k ★
146k q'sStack Overflow14k q's
Very HighCommunityVery High
Express.jsFastAPI
Key Differences
| Factor | Express.js | FastAPI |
|---|---|---|
| License | MIT | MIT |
| Language | JavaScript / TypeScript | Python |
| Hosted | Self-hosted | Self-hosted |
| Free tier | — | ✓ Yes |
| Open Source | ✓ Yes | ✓ Yes |
| TypeScript | ✓ | — |
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
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
Side-by-side Quick Start
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'));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/docsCommunity 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.