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Tumblr was founded around Februrary in the year 2007. David Karp is the creator of this fantastic website.
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Tumblr was lauched on April 27, 2007 by David Karp. Marco Arment was one of the lead developer. However. he left the company in 2010 to focus all his time in "Instapaper." A couple of weeks after the launch of tumblr it had 75,000 users already.
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According to comScore, it scored 13.4 million unique visitors in the United States alone in July 2011 up 218% from July 2010.
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An analysis by AddThis of shares through their service in 2011 noted that Tumblr sharing had increased by 1299.5%.
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In 2011, We are the 99% Tumblr went viral and became the unifying slogan or the Occupy Wall Street movement.
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The company had a $800 million valuation in August 2011.In September 2011, the company raised $85 million in a round of funding led by Greylock Partners and Insight Venture Partners.
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As of September 2011, the website receives more than 13 billion views per month.
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On October 21. 2011 tumblr became the first blogging plataform to host President Obama's blog.
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As of this date tumblr had over 69.4 million blogs and more than 30 billion total posts.
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Today tumblr has over 77 million blogs.
