Instagram Gains 100 Million Users in Nine Months, Beating Twitter

Instagram gained 100 million users in just nine months, and now currently boasts 400 million monthly active users—more than social Twitter, which has 316 million. Mario Anzuoni/Reuters

Mobile photo-sharing app Instagram announced on Tuesday that it has 400 million monthly active users—more than social networking site, Twitter, which has 316 million.

Instagram announced the news of its community growth in a blog post, also saying that a record 80 million photos are being shared every day, with 75 percent of users living outside of the U.S. The app has gained an additional 100 million users in just nine months.

"We've seen inspiring moments like the first surface image of Pluto and Champions League celebrations," Instagram wrote on its blog. "Among the last 100 million to join, more than half live in Europe and Asia. The countries that added the most Instagrammers include Brazil, Japan and Indonesia," it added.

The post also mentioned the celebrities who have joined the app in the last nine months, including the former England footballer David Beckham, Caitlyn Jenner and German football player Toni Kroos.

Instagram's success comes after Twitter announced in late July that the number of its monthly average users grew at the slowest pace since it went public in 2013. The announcement led to the company's shares falling more than 11 percent in extended trade. Twitter's co-founder Jack Dorsey, told analysts at the time: "This is unacceptable and we're not happy about it."

Instagram was bought by Facebook in 2012 for $1 billion. Earlier this month, the app extended its advertising across the globe, projecting revenues of $570 million in 2015, a figure which is estimated to quadruple by 2017, meaning the app would generate $2.39 billion.