CoinMarketCap is a website that provides information about various cryptocurrencies, including their market capitalization, trading volume, price, and other related data. The site was founded in 2013 and has become one of the most widely used sources of information for cryptocurrency investors and enthusiasts.

CoinMarketCap allows users to track the performance of more than 10,000 cryptocurrencies, as well as view market trends, news, and other data related to the digital currency industry. The site provides real-time price updates, historical data, and a variety of tools for analyzing and comparing different cryptocurrencies.

CoinMarketCap also offers an API for developers to access the data on the site, as well as a mobile app for iOS and Android devices. The site has become an important resource for anyone interested in the cryptocurrency market, from individual investors to institutional traders and financial analysts.