There are nearly 28 million blogs on Tubmblr, and that’s up from just 7 million a year ago, according to Pingdom. The firm is sharing some new stats about the popular blogging/social media service.

Tumblr is also approaching 10 billion total posts. You can see a running count if you go to the about page. In fact, today alone, there have been over 37 million posts at the time of this writing (a little after 5pm Eastern).

Marketers, you may not want to ignore Tumblr when it comes to your social media and content efforts.

Here are some other Tumblr stats from Pingdom:

• 434 posts per second
• 26,000 posts per minute
• 1.56 million posts per hour
• 263 million posts per week
• 1.1 billion posts per month
• 13.7 billion posts per year

“At the current rate, the number of posts on Tumblr will pass 20 billion in nine months. Considering how Tumblr usage is increasing, though, we expect that to happen a lot sooner,” Pingdom says. “Such a huge influx of posts could of course put a strain on any web service, but we suspect the biggest challenge for Tumblr isn’t really getting all those new posts into their system. The greater challenge is bound to be the serving of all that content to readers and handling all the other interactions those posts create.”
Tumblr serves 12.5 billion page views per month, and the number is growing fast. Pingdom points to Quantcast data:

It’s also jumping up on Google Trends.

You may also want to start paying more attention to Reddit. A blog post from the company today says that it has tripled in size in just 15 months.

“Over the past 15 months, reddit has tripled in size. Since last May, we’ve grown from 7 million monthly unique visitors to 21.5 million. Our pageviews have exploded 4x to a staggering 1.6 billion pages served per month,” the company says. “This growth brings new diversity, new opportunities, and new challenges to our communities. There are now over 6,500 subreddits with over 100 subscribers. As we welcome new members into our communities, I’d like to take this opportunity to clarify how reddit works and what role moderators and admins play in the process.”

We’ve seen first hand that reddit can drive some serious traffic to your site if you have the right content.