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Co-founder of 15Five (grew it past $50M ARR as CEO), building a stealth startup
David Hassell co-founded 15Five in 2011 and led it as CEO until 2024, growing it past $50M in ARR. He is now Vice Chairman, Co-Founder and Evangelist at 15Five and is building a stealth startup. Earlier he co-founded Endai Worldwide and served as President of Entrepreneurs' Organization San Francisco.