Breef, an online marketplace for high-value, high-consideration transactions between brands and agencies, has announced $3.5 million in funding led by Greycroft. With prior investment, this round takes Breef's total funding to $4.5 million.

Alongside Greycroft, additional investors in Breef include Rackhouse Ventures, The House Fund, John and Helen McBain, Lance Armstrong, 640 Oxford Ventures and Laurence Holyoake.

Founded in 2019 by Emily Bibb and George Raptis, Breef's proprietary platform allows brands to manage and service all agency projects, pitches and payments, facilitating efficiencies within today's distributed workforce. The platform hosts more than 5,000 vetted agencies and is used by hundreds of world-leading brands, transacting millions of dollars in projects each month.