Guide Note

Plaxo is an online address book that automatically updates contact information in a user's address book when that user's contacts update their information. It is the first site to use Google OpenSocial, Google's open social networking application development standard.

Fast Facts

1. Founded in 2002¹
2. Over 40 million users¹
3. Supports more than 30 networking and web 2.0 sites¹
4. Promotes the Open Social Web's "Bill of Rights"¹
5. Subsidiary of Comcast Media

Plaxo implemented its Pulse service in early 2008. Plaxo Pulse recreates Plaxo on a more networked platform. The mobile version has been made available on Windows Mobile OS and has also been optimized as an application for the Apple iPhone.

Google OpenSocial