Hotmail/Outlook
Outlook.com is a free web-based email service operated by Microsoft. One of the world's first webmail services, it was founded in 1996 as Hotmail (stylized as HoTMaiL) by Sabeer Bhatia and Jack Smith in Mountain View, California and headquartered in Sunnyvale. It was acquired by Microsoft in 1997 for an estimated $400 million and launched as MSN Hotmail, later rebranded to Windows Live Hotmail as part of the Windows Live suite of products. The last version was released in 2011. As of 2011, Hotmail had 360 million users per month. It was available in 36 different languages. In 2013, Hotmail was replaced with Outlook.com, It also features unlimited storage, Ajax, and integration with Calendar, SkyDrive, People and Skype.