WhatStack is a free Chrome extension that provides an in-depth analysis of any website's technology stack. It allows users to instantly detect various components such as frameworks, content management systems (CMS), analytics tools, and hosting providers with just a single click. This tool is aimed at developers, agencies, recruiters, and researchers, offering a professional-grade solution for understanding the technologies that power modern websites.

The primary function of WhatStack is to perform a deep Stack Scan, which reveals the underlying technologies of a website. This can be particularly useful for developers looking to audit infrastructure, agencies wanting to assess a prospective client's tech stack, recruiters verifying a company's engineering tools for outreach, and researchers conducting competitive intelligence. Overall, WhatStack serves as a vital tool for anyone needing detailed insights into website technologies.