Yahoo! Mail
Yahoo! Mail is an email service launched in 1997 through the American parent company Yahoo!. Yahoo Mail provides four different email plans: three for personal use (Basic, Plus, and Ad Free) and another for businesses. By December 2011, Yahoo! Mail had 281 million users, making it the third largest web-based email service in the world. Since 2015 its webmail client also supports managing non-Yahoo e-mail accounts.
History of Gmail
Gmail was a project started by Google developer Paul Buchheit, who had already explored the idea of web-based email in the 1990s, before the launch of Hotmail, while working on a personal email software project as a college student. Buchheit began his work on Gmail in August 2001. At Google, Buchheit had first worked on Google Groups and when asked "to build some type of email or personalization product", he created the first version of Gmail in one day, reusing the code from Google Groups. The project was known by the code name "Caribou", a reference to a Dilbert comic strip about Project Caribou.