ChatCrawler is a search engine and catalog for publicly accessible Telegram groups, channels, and posts. It indexes open Telegram content, helping users discover communities, explore channel activity, and search public posts. Users can look up a Telegram username or ID through its web app or bot to find information that is publicly available, including public groups and channels where an account has posted and username history.

The platform offers a catalog of Telegram venues, with rankings and statistics covering categories such as news, technology, business, education, entertainment, and crypto. Users can browse growing communities, active groups, popular channels, and venues with notable post reach. ChatCrawler also provides information about its indexing and counting methods, along with answers to common questions about the service.

ChatCrawler focuses on open content: it does not provide access to private chats, leaked databases, or other closed records. Its tools are designed to make public Telegram information easier to search and explore.