Starting on April 7, 2003, Yahoo! Search became its own web crawler-based search engine. They combined the capabilities of search engine companies they had acquired and their prior research into a reinvented crawler called "Yahoo!". The new search engine results were included in all of Yahoo's websites that had a web search function. Yahoo! also started to sell the search engine results to other companies, to show on their own websites. Their relationship with Google was terminated at that time, with the former partners becoming each other's main competitors.