Photo-sharing site Instagram said Wednesday that its active monthly user base reached 300 million, a dramatic 50% increase in the past nine months.

Instagram, which launched in 2010, edged past 8-year-old Twitter and its reported 284 million monthly active users.

Facebook, which bought Instagram in 2012 for $1 billion, has nothing to worry about. In September, the social network reported that its own active monthly user base had hit 1.35 billion.

“Over the past four years, what began as two friends with a dream has grown into a global community that shares more than 70 million photos and videos each day,” wrote Instagram CEO Kevin Systrom in a blog post. “We’re thrilled to watch this community thrive and witness the amazing connections people make over shared passions and journeys.”

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