Google+ could have 400 million users by the end of this year, says the founder of

According to Paul Allen, who is also the founder of, "Google+ is adding new users at a very rapid pace".

"There is no question that the number of new users signing up for Google+ each day has accelerated markedly in the past several weeks," he said on his Google+ page.

Allen said that based on the actual user announcements made by Google on July 13, when 10 million people had signed up, and Oct 13 (450 million users), at present the social network is achieving 625,000 new sign-ups every day. If this continues, Google+ will have 100 million users on February 25th reach and 200 million users on August 3. At this rate, Google+ will finish 2012 with 293 million users. However, he expects the growth to continue to accelerate, thanks to integration of the social network into other products and a surge in Android devices being activated.

"Based on the accelerated growth I'm seeing and all the dials and levers Google can still utilise, and the developer ecosystem that will be developed, I predict that 2012 is going to be a breakout year for Google+ and that it will end next year with more than 400 million users," he said.

Google+ was unveiled in June last year and allows web users to share photos, chat to each other and leave messages and comments. The social network also benefits from Circles which lets users create lists of friends to share content with, as well as live video-chat for multiple users known as Hangouts, Huddle – a form of group instant messaging – and Sparks that lets users interact with others that have similar interests.