Google is in discussions to acquire Meebo for as much as $100 million, sources have told the often-reliable AllThingsD.

Meebo was founded in 2005 as a messaging app for the browser, a product that still exists as Meebo Messenger. The Mountain View, Calif.-based startup has since developed an expanding suite of social and mobile apps for consumers as well as publishers, each designed to enable online communication.

Meebo raised $25 million in its last round of financing in 2010. The round was led by Khosla Ventures with participation from Draper Fisher Jurvetson and Sequoia Capital. The company has raised $62.5 million to date.

Neither Google nor Meebo could be reached for comment.