Andreessen Horowitz, co-founded last year by Andreessen and Ben Horowitz, has previously invested in companies such as Skype Technologies SA and Foursquare, which makes software that lets people locate their friends.
The Menlo Park, California-based firm said it plans to invest in similar startups with the new funds it raised. Andreessen, 39, and Horowitz, 44, started out with a $300 million fund last year.
Bloomberg LP, the parent company of Bloomberg News, is an investor in Andreessen Horowitz.
To contact the editor responsible for this story: Peter Elstrom at email@example.com