David Karp, founder of Tumblr participates in the Social Media Rockstar Panel at The GRAMMY Museum on January 29, 2010 in Los Angeles, California.
After six years in existence, Tumblr reached the 100-million blog mark this week.
The milestone -- including over 44.6 billion posts -- was hit with little celebration, according to NBC News. In fact, the first mention of the event was on The Next Web, an online publication about Internet technology. Tumblr's "About" page has a counter that shows how many blogs and posts exist on the site. The metric comes almost exactly one year after the site reached the 20-billion-post mark in similar casual fashion, at a time when there were nearly 50 million blogs.
Last week, Twitter announced it reached over 200 million users with a video on YouTube, which also hit a big milestone last Wednesday: 1 billion monthly unique users.
Although Tumblr lags its social media competitors in overall user numbers, the L.A. Times reported that a survey released earlier this year revealed that more teens and young adults use Tumblr in comparison to Facebook.