BuiltWith.com is an online research and analysis tool that helps users to identify and collect data on websites, technologies, and tools used by the websites. The website provides information about the technology stack, web frameworks, content management systems, advertising platforms, and analytics tools used by millions of websites on the internet. BuiltWith.com uses crawling and machine learning techniques to collect data on websites and provide users with insights on online trends, markets, and competitors. The website is a useful tool for digital marketers, web developers, and businesses to get a comprehensive understanding of the technologies and tools used by their target audience and to improve their online presence and marketing strategies.