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Website ownership clues

Who built this website?

WhosBuilt checks public signals that can reveal the person, company, agency, stack, and infrastructure behind a website.

Creator credits in footers, humans.txt, about pages, and HTML comments
Author, Open Graph, generator, and JSON-LD metadata embedded in the page
Framework, CMS, analytics, CDN, and server fingerprints from HTML and headers
Hosting provider, DNS records, IP network, email provider, WHOIS, registrar, and SSL data

How WhosBuilt finds builder signals

Some sites leave direct credits: a footer link to an agency, a humans.txt file, an author tag, or structured data naming an organization. Other sites only expose indirect clues, such as a CMS generator tag, CDN headers, hosting DNS, analytics scripts, registrar data, or SSL certificate details.

WhosBuilt combines those signals into one scan so you can move from “who built this website?” to a practical answer: who owns it, what stack it uses, where it is hosted, and which public traces point to the builder.

When to use it

  • Research a prospect before outreach
  • Find the agency or vendor behind a site
  • Compare a competitor's platform choices
  • Check whether ownership clues match public claims

If you mainly need framework, CMS, hosting, or CDN details, use the website tech stack checker.

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