Wappalyzer is an open-source, platform independent utility capable of identifying 1,042 different web technologies. It was created by Elbert Alias in 2009, has received contributions from hundreds of developers worldwide and enjoys an active user base of over half a million people.
Wappalyzer fingerprints software using unique patterns found in website source code, response headers, script variables and several other methods.
Wappalyzer collects data anonymously and organically through the browser extensions. This information is processed and made available as purchasable datasets, providing valuable insights into the software industry.