GABRIEL WEINBERG is the CEO and Founder of DuckDuckGo, a private search engine and Internet privacy startup. He has a bachelor's degree in science. with a bachelor's degree in physics from MIT and a master's degree in science Technology and Policy Program at MIT. Weinberg is a co-author of the book Super Thinking.

JUSTIN MARES is the co-founder of two firms and the previous director of revenue at Exceptional, a Rackspace-acquired software company. He tweets as @jwmares and lives in San Francisco. www.tractionbook.com is a website dedicated to traction books.