DetectZeStack — Tech Stack Detection API
Detect any website's tech stack with a single API call
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Michael Lugo

DetectZeStack — Tech Stack Detection API - Detect any website's tech stack with a single API call

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REST API that identifies what technologies any website uses. Pass a URL, get back the full stack — frameworks, CMS, CDNs, analytics, and more. 4 detection methods in a single call: Wappalyzer fingerprinting (3,500+ signatures), DNS CNAME analysis, TLS certificate inspection, and HTTP header matching. Batch analysis (10 URLs), stack comparison, CPE identifiers for vulnerability mapping, and 24h smart cache. Free tier: 100 req/month.

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Michael Lugo
Maker
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Hey everyone! I'm the maker of DetectZeStack. I built this because I needed tech stack data for a sales pipeline and the existing options were either too expensive (BuiltWith starts at $295/month) or too limited (Wappalyzer's API misses infrastructure-level tech). The key insight was combining multiple detection methods. Wappalyzer is great for front-end frameworks but misses CDNs and infrastructure. DNS CNAME lookups catch things like Cloudflare, Fastly, and Vercel that are invisible to HTML analysis. TLS certificates reveal security providers. Together they give you the full picture. Try the live demo on the homepage — no signup required: https://detectzestack.fly.dev Would love your feedback. What would make this more useful for your workflow?