New: T3 Sixty releases Tech500, its’ lists of Top Technology Providers based on the T3 Technology Landscape. 

Power 200 Rank


Sean Black

Co-Founder and CEO


Black runs Knock, which operates a twist on the iBuying business with a home trade-in program. Knock, which Black co-founded in 2015 and raised $400 million in debt and equity in January 2019, targets sellers who are buying another home; it makes an all-cash offer, on their behalf, on their next home and then spruces up and sells their current home. Black previously served as Trulia’s vice president of sales.

Evaluating Leaders

Leaders are evaluated based on the office they hold, the decision-making power associated with the office, the financial resources at their disposal, their organization’s industry significance and geographical reach, public announcements about imminent changes, their tenure and their personal influence in the industry.