Acompli

Acquired by Microsoft
on December 1, 2014
Email
$200m

MailRank

Acquired by Facebook
on November 15, 2011
Email
Undisclosed

reMail

Acquired by Google
on February 17, 2010
Email
Undisclosed

Xoopit

Acquired by Yahoo
on July 23, 2009
Email
$20m

Stata Labs

Acquired by Yahoo
on October 1, 2004
Email
Undisclosed

Oddpost

Acquired by Yahoo
on July 12, 2004
Email
Undisclosed

Jump Networks

Acquired by Microsoft
on April 26, 1999
Email
Undisclosed

Hotmail

Acquired by Microsoft
on December 31, 1997
Email
$400m