Postini, Inc.
Developer(s)Google (acquired in 2007)
Initial release1999; 25 years ago (1999)
Final release
  / 2014
PlatformCross-platform web service
TypeE-mail and Web security Edit this on Wikidata

Postini, Inc.[1] was an e-mail, Web security, and archiving service owned by Google since 2007. It provided cloud computing services for filtering e-mail spam and malware (before it was delivered to a client's mail server), offered optional e-mail archiving, and protected client networks from web-borne malware.


Postini was a startup company founded in 1999 by Shinya Akamine, Gordon Irlam, Brian Maggi, and Scott Petry in Redwood City, California, United States.[2][3] It was backed by August Capital, with second-round funding from August as well as Summit Partners Accelerator Fund and Sun Microsystems.[4] By February 2005, it was operating ten U.S. data centers, processing 2.5 billion e-mail messages weekly, and providing anti-spam services for more than 4,200 companies and "6 million end users, including workers at Merrill Lynch, Circuit City, Rayovac, and Hormel Foods, the company that makes Spam, the canned meat product".[2] Later in 2005 it moved to nearby San Carlos, California.[5]

On July 9, 2007, Google announced that it had signed a definitive agreement to acquire Postini.[6] Google paid $625 million in cash for the acquisition.[7]

In September 2011, Google announced it would discontinue a number of its products, including Google Web Security, which was acquired by Google as part of Postini.[8] On August 21, 2012, Google announced it would be shutting down all of Postini's web services and folding the service's users into Google Apps.[9] After a multi-year migration effort, the last customers were migrated to Google Apps in the second half of 2015.[citation needed]

See also


  1. ^ "Postini, Inc". OpenCorporates. December 6, 1999. Retrieved August 20, 2023.
  2. ^ a b Hesseldahl, Arik (February 14, 2005). "Death To Spam". Forbes. Retrieved January 16, 2010.
  3. ^ Blackwell, Gerry (November 20, 2000). "Hope on the E-mail Front". Archived from the original on September 28, 2009. Retrieved January 16, 2010.
  4. ^ Blackwell, Gerry (November 20, 2001). "Postini Revisited". Archived from the original on April 15, 2010. Retrieved January 16, 2010.
  5. ^ McMillan, Robert (November 15, 2005). "Postini taps VeriSign for new CEO". InfoWorld. Retrieved January 16, 2010.
  6. ^ Girouard, Dave (September 13, 2007). "We've officially acquired Postini". The Official Google Blog. Retrieved October 23, 2007.
  7. ^ Google Inc. Form 10-Q 30 June 2007 interim financial statements SEC Accession No. 0001193125-07-175880
  8. ^ Alan Eustace (September 2, 2011). "A fall spring-clean". Google. Retrieved September 2, 2011.
  9. ^ Juan Carlos Perez (August 21, 2012). "Google Postini Email services will be shutting down, new encryption service appears to be on the way". Retrieved August 28, 2012.