"When we're done, Google is going to come across as a beautifully integrated set of services," Gundotra said.

"Google+ will touch every aspect of Google," he added.

Asked whether they envision Google+ and Facebook co-existing, with people using both for different purposes, both Brin and Gundotra said yes.

People have been using a variety of online services for communicating and sharing content for years, including blog publishing sites like Google's Blogger, e-mail services, photo and video sharing sites, and the like, they said.