This isn't meant to be an accurate analysis, but it gets halfway there. Have your grain of salt ready. Wufoo has pretty standard conversion rates of 7% signup

This isn't meant to be an accurate analysis, but it gets halfway there. Have your grain of salt ready. Wufoo has pretty standard conversion rates of 7% signup, 15% free -> paid. Each paid user nets about $13/mo. (http://particletree.com/features/web-app-autopsy/ http://particletree.com/features/web-app-autopsy/) Compete (500k/mo | http://siteanalytics.compete.com/wufoo.com/ http://siteanalytics.compete.com/wufoo.com/) and Quantcast(250k/mo | http://www.quantcast.com/wufoo.com http://www.quantcast.com/wufoo.com) have vastly different total traffic numbers, but Quantcast suggests that only 15% of their traffic are regular users. MY GUESS: Their monthly active users are probably between 30k-75k. 30% of their active users are paid users. I'd say they make about 250k/mo.