FRONTEND FRAMEWORKS

React detection API

Leading JS framework; 10M+ public sites detected by Wappalyzer class tools.

Lookup free — 100/mo
10.2%
of web uses React
4
detection signals
Frontend Frameworks
category
97%+
detection accuracy

How TechSpy detects React

Sample API call

GET https://api.techspy.dev/v1/lookup?domain=example.com
Authorization: Bearer <your-key>

# Returns:
{
  "domain": "example.com",
  "technologies": [
    { "slug": "react", "name": "React", "category": "Frontend Frameworks", "confidence": 0.98 }
  ]
}

Typical use cases

Live React stack profiles

Real scans, with the signal that fired for every match:

FAQ

How does TechSpy detect React?

TechSpy inspects 4 signals including: react-dom script tags, __NEXT_DATA__ (Next.js). Detection accuracy is 97%+ on public pages.

Can I bulk-lookup sites running React?

Yes — the TechSpy API supports batch lookups. Starter plan includes 10,000 lookups/month at $29.

What's React's adoption?

Leading JS framework; 10M+ public sites detected by Wappalyzer class tools.

✓ Last updated Jul 24, 2026