Microsoft and Google want to make it clear that their email services, Outlook, Hotmail and Gmail, are safe from US government spies.
Yahoo! Inc. is best known for its web portal and search engine, but its services include Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Finance and others. Founded by Jerry Yang and David Filo in January 1994, the company was initially in the forefront of the technology boom but has struggled to reinvent itself in the face of competition from companies like Google and Facebook.