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Website Technology Stack Detector

Detect the complete technology stack of any website. This Apify Actor identifies 140+ technologies across 20+ categories including CMS platforms, JavaScript frameworks, CSS frameworks, analytics tools, advertising pixels, payment processors, CDNs, hosting providers, and more.

Why this Actor?

• BuiltWith charges $295+/month for technology lookups
• Wappalyzer was acquired and limited its free tier
• This Actor provides full detection at a fraction of the cost — $5 per 1,000 URLs

What it detects

Detection methods

The Actor uses multiple detection techniques for high accuracy:

1. HTML analysis — meta tags, generator tags, DOM patterns
2. JavaScript globals — checks window for framework-specific variables (__NEXT_DATA__, Shopify, etc.)
3. HTTP headers — X-Powered-By, Server, CDN-specific headers
4. Script URLs — CDN patterns, library filenames
5. CSS patterns — class naming conventions (Tailwind, Bootstrap, MUI)
6. Cookies — technology-specific cookie names
7. DNS records — CNAME and NS records for CDN/hosting detection
8. robots.txt — CMS-specific paths and patterns

Each technology gets a confidence score (0–100%) based on how many signals matched. Version detection is attempted where possible.

Input

{
"urls":[
"https://example.com",
"https://shopify.com",
"https://vercel.com"
],
"maxConcurrency":5,
"navigationTimeoutSecs":30,
"waitForSecs":3,
"checkHeaders":true,
"checkCookies":true,
"checkDns":true,
"checkRobotsTxt":true
}

Output

Each URL produces a dataset item:

{
"url":"https://vercel.com",
"domain":"vercel.com",
"https":true,
"technologiesCount":12,
"categories":"Analytics, CDN, CSS Framework, Cookie Consent, Hosting, JavaScript Framework, SEO",
"technologies":[
{
"name":"Next.js",
"category":"JavaScript Framework",
"confidence":100,
"evidence":[
{"type":"html","matches":["__NEXT_DATA__","_next/static"]},
{"type":"scripts","matches":["_next/static/","_next/"]},
{"type":"globalJs","matches":["__NEXT_DATA__","__next"]},
{"type":"headers","matches":["X-Powered-By: Next.js"]}
],
"version":"14.0.3",
"website":"https://nextjs.org"
},
{
"name":"Vercel",
"category":"Hosting",
"confidence":100,
"evidence":[
{"type":"headers","matches":["X-Vercel-Id: iad1::abcdef"]}
],
"website":"https://vercel.com"
}
],
"technologyGroups":{
"JavaScript Framework":["Next.js","React"],
"Hosting":["Vercel"],
"CDN":["Cloudflare"],
"Analytics":["Google Analytics 4"]
},
"analysisTimeMs":4523,
"analyzedAt":"2024-01-15T10:30:00.000Z"
}

A summary is also saved to the key-value store under the key SUMMARY.

Use cases

• Competitive analysis — see what technologies your competitors use
• Lead generation — find companies using specific technologies
• Market research — understand technology adoption trends
• Security audits — identify outdated or vulnerable technologies
• Agency prospecting — find sites built with specific platforms

Pricing

Pay-Per-Event: $4.00 per 1,000 URLs analyzed ($0.004 per URL).

Limitations

• Some technologies can only be detected when their JavaScript loads (requires full page render)
• Version detection is best-effort and depends on the technology exposing version info
• DNS-based detection may not work behind certain proxy configurations
• Single-page applications may need longer waitForSecs for full detection

License

ISC