"Instagram has told Newsbeat it has the potential to "change the world" as it announced it has overtaken Twitter with 300 million users.
The company's CEO Kevin Systrom described the milestone as "exciting" and said the company would "continue to grow".
Twitter claims to have 284 million users accessing the network each month.
Facebook, which boasts 1.35 billion monthly active users, bought Instagram in 2012.
Speaking to Newsbeat ahead of the announcement, Kevin Systrom said: "Instagram is about seeing a live pulse of the world right now, it's not just about taking a photo of a cute baby or a cute dog."
Instagram is also introducing verified accounts similar to the blue tick symbols used by Facebook and Twitter"
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Instagram now bigger than Twitter - BBC Newsbeat