AUSTIN, Texas — Photo-sharing app Instagram has nearly doubled its total number of registered users since December, Instagram founder Kevin Systrom (pictured above) announced Sunday at the South by Southwest conference.
Instagram, which launched two years ago, now boasts 27 million registered users, up from 15 million in December of last year, according to Systrom. Foursquare, by comparison, claims just under 20 million users, and was founded in March of 2009.
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