Seed round led by Brad Burnham, founder of Union Square Ventures and Placeholder, to put online data back in users' control NEW YORK, June 27, 2019-- 3Box, makers of decentralized identity and data storage infrastructure, have closed a $2.5 million seed financing round led by Placeholder Ventures to reinvent the way applications handle user data online. Venrock, Northzone and CoinFund also participated in the round. 3Box was previously funded and incubated by Ethereum product developer ConsenSys and graduated from its venture production studio earlier this spring. In today's digital climate, many companies don't want to manage user data.