Uncover what every company is built with.
A self-growing technology + company intelligence dataset — built on Common Crawl, Certificate Transparency, and live stealth rendering. Detect any site's stack, find everyone using a tool, and track it over time.
Everything BuiltWith does — and a catalog that grows itself.
Tech detection
For any domain: CMS, frameworks, analytics, pixels, payments, CDNs, server stack — with versions.
Reverse lookup
Find every company using a technology. “Show me everyone on Shopify + Klaviyo.”
Similar companies
Lookalikes ranked by how much of their stack overlaps — for prospecting and competitive intel.
Self-growing catalog
New tools are discovered automatically from the request graph — the technology list grows without manual fingerprints.
Beyond the page
Stealth headless rendering + tag-manager expansion uncover tools injected at runtime, not just static HTML.
Refreshable & historical
Rebuilt from each Common Crawl + live on-demand, with history so you can see when a tool was adopted or dropped.
How it works
Universe
Domains from Common Crawl + Certificate Transparency + zone files.
Acquire
Homepage HTML + headers from Common Crawl; live stealth render for the rest.
Detect
Wappalyzer fingerprints + our overlay + vendor host-map over every request.
Serve
Canonicalized, deduped, queryable — profiles, reverse lookups, similar companies.
Get early API access
Query any domain, run reverse lookups, export datasets. Tell us what you’re building.