Company Tech Stack Detector

Identify what technologies any website runs. Analyzes HTTP headers, HTML source, and script patterns to detect CMS, analytics, marketing tools, CDNs, and more. Works as a BuiltWith alternative with no API key required.

Features

• Detect CMS: WordPress, Drupal, Joomla, Shopify, Webflow, Squarespace
• Identify analytics: Google Analytics, Mixpanel, Amplitude, Hotjar, Matomo
• Find tag managers: Google Tag Manager, Segment, Adobe Launch
• Detect ecommerce: Shopify, WooCommerce, Magento, BigCommerce
• Identify CDN: Cloudflare, Fastly, CloudFront, Varnish, Akamai
• Find marketing tools: HubSpot, Mailchimp, Klaviyo, ActiveCampaign
• Detect chat/support: Intercom, Drift, Zendesk, Crisp
• Find payment processors: Stripe, PayPal, Braintree
• Deep mode: also checks robots.txt and sitemap.xml for extra signals
• 40+ technology signatures total

Use Cases

• Competitive intelligence: see what stack competitors run before a pitch
• Sales prospecting: filter leads by technology — "everyone on Shopify using Klaviyo"
• Market research: track adoption rates of platforms across an industry
• Agency audits: hand prospects a full tech breakdown of their current site
• Partnership targeting: find sites running complementary tools for integration sales

Input

Field	Type	Required	Description	Default
urls	array of strings	Yes	Domains or full URLs to analyze	—
deep	boolean	No	Also inspect robots.txt and sitemap.xml	false

Example input:

{ "urls": ["example.com", "https://store.example.com"], "deep": true }

Output

One result per URL:

{ "url": "example.com", "technologies": [ {"name": "WordPress", "category": "CMS", "confidence": 0.95}, {"name": "Google Tag Manager", "category": "Tag Manager", "confidence": 1.0}, {"name": "Cloudflare", "category": "CDN", "confidence": 1.0}, {"name": "HubSpot", "category": "Marketing", "confidence": 0.85}, {"name": "Stripe", "category": "Payment", "confidence": 0.9} ], "server": "nginx/1.21.0", "headers_summary": { "server": "nginx/1.21.0", "x-powered-by": "PHP/8.1", "cf-ray": "present", "x-cache": "not present" } }

Field	Type	Description
url	string	The URL that was analyzed
technologies	array	Detected tech: name (string), category (string), confidence (float 0-1)
server	string	Server header value
headers_summary	object	Key HTTP headers and whether they are present

Pricing

$2.50 per 1,000 results ($0.0025 per result).

How It Works

Sends an HTTP GET request, then scans the HTML source for known script URLs, meta tags, and fingerprint strings. Matches against a 40+ signature database covering major SaaS tools. Also parses HTTP response headers for server identification. Deep mode fetches /robots.txt and /sitemap.xml for additional clues.

FAQ

How accurate is it? Pattern-matching catches well-known tools at roughly 85% accuracy. Custom or heavily minified sites may return fewer detections. Confidence scores help you filter noise.

What if a site blocks the request? The actor returns whatever it can extract from partial headers. Cloudflare-protected sites sometimes yield only the CDN detection.

Do I need authentication? No. All detection is passive — reads public HTML and headers. No API keys or login required.

Does deep mode slow things down? Slightly. It makes 2-3 extra requests per URL (robots.txt, sitemap.xml). Adds about 1 second per site.

Limits

• Timeout: 15 seconds per URL
• Works on publicly accessible sites only (no login walls or paywalls)
• JavaScript-rendered tech (loaded after page load) may be missed
• Confidence scores below 0.5 are filtered from results