Google+ Hits 400 Million Users; 100 Million Active

According to Google

Year-old Google+ has passed a significant milestone, Google said today: 400 million users, with 100 million of those users active each month.

"It was only a year ago that we opened public sign-up, and we couldn't have imagined that so many people would join in just 12 months," said Vic Gundotra, senior vice president of engineering at Google, in a post. "While Google+ is all about creating a better experience across Google, it's also a destination."