Blog platform company Tumblr has raised $5 million from Spark Capital and Union Square. Tumblr currently has 4.5 million users and hits about 1 billion page views per month. Tumblr founder David Karp is not a fan of advertising so he is trying to find ways to make money through other forms, such as virtual stickers and premium themes. Tumblr is based in New York and was founded in 2007. The company raised a total of $10 million in funding.