Yahoo!
Yahoo grew rapidly throughout the 1990s. Yahoo went public in April 1996 and its stock price rose by 600 percent within two years. Like many search engines and web directories, Yahoo added a web portal, putting it in competition with services like Excite, Lycos and America Online. By 1998, Yahoo was the most popular starting point for web users, and the human-edited Yahoo Directory the most popular search engine, receiving 95 million page views per day which was triple the number compared to rival Excite. It also made many high-profile acquisitions. Yahoo began offering free e-mail from October 1997 after the acquisition of RocketMail, which was then renamed to Yahoo! Mail. In 1998, Yahoo! decided to replace AltaVista as the crawler-based search engine underlying the Directory with Inktomi. Yahoo's two biggest acquisitions were made in 1999 - that of Geocities for $3.6 billion, and Broadcast.com for $5.7 billion.
Hightail
Throughout 2008, YouSendIt added plugins that allowed files to be sent through YouSendIt from within applications like Final Cut Pro, Microsoft Outlook, and Adobe Acrobat. In May of that year, a new release of Yahoo! Mail included YouSendIt built-in, which added a million YouSendIt users over the following two months. In July, YouSendIt's online folder management system and digital signing features were introduced in order to compete with Dropbox. The following month, YouSendIt added applications for Mac and PC desktops, as well as iOS and Android devices.