Tumblr
BY Jason Fell
Learn how the 26-year-old founder navigated the challenges of growing the business in the early days. In Yahoo Deal, Tumblr Becomes the Next $1 Billion Startup
BY Jason Fell
The blogging platform's 26-year-old founder, David Karp, will stay on as chief executive. Foursquare Gets a Big Financial Lifeline and Revamps Its App
BY Brian Patrick Eha
Foursquare improves its search features, LinkedIn gets a news reader, Tumblr puts the kibosh on Storyboard and more social-media news. Marketing to Teens? What You Need to Know About Tumblr
BY Matt Wilson
A recent survey of teenage and young-adult social media users found that people in those age groups prefer Tumblr to Facebook or Twitter. 6 Tips for Being More Visual With Social Media (Infographic)
BY Donna Moritz
Ideas for creating engaging visual content, then getting your fans share them and promote your brand. Tumblr Hacked: 4 Tips for Keeping Your Sites Safe
BY Jason Fell
Advice for keeping your website free of malicious content and your sensitive information protected from theft. A Quick Guide to Using Tumblr for Business
BY Amy Gahran
The blogging and social networking site can help increase search visibility and provide a mobile-friendly platform.Play Video How Should Entrepreneurs Plan to Scale Their Businesses? (Video)
Tumblr's David Karp on two critical questions to answer when managing hypergrowth. New York, the City that Never Disconnects?
BY Shira Lazar
New York is claiming ever more tech cred these days. Steven Rosenbaum, the city's first Entrepreneur at Large, discusses the Big Apple and the burgeoning idea of curation. Finding the Best Time to Post to Social Networks
BY Jason Fell
Popular URL shortening service bitly examines the peak times to post to Facebook, Twitter and Tumblr. Emerging Social Media Sites to Attract Users
BY Mikal E. Belicove
As email and instant messaging loses prowess among users, smaller social-networking sites are stepping up. Startup Strives to Make Customer Service a More 'Zen' Experience
BY John Shinal
How three immigrant entrepreneurs found U.S. success in launching Zendesk. 
