Institutional-grade custody for digital assets

PolySign's custody solution supports the full spectrum of digital assets and is designed to scale to trillions under management.

Custody: the biggest problem facing digital assets

The cryptographic secret unlocks access to all funds. Once the secret is stolen or lost, funds can never be recovered.

PolySign's digital asset custody platform is a step-function above other solutions

Leading blockchain architects Arthur Britto and David Schwartz designed PolySign's solution for securing digital assets.

PolySign was founded in 2017 by a team of world-class experts in both financial services and cryptocurrencies.

Our Leadership Team

Jack McDonald

CEO and Board Member

Prior to joining PolySign, Jack McDonald was CEO of Conifer Financial Services for a decade, where he grew AUA from $5B to $125B culminating in a successful exit in 2016. Before Conifer, Jack was the Managing Director and Head of West Coast Equities at UBS. Jack was named one of the ‘20 Rising Stars of Hedge Funds’ by Institutional Investor Magazine and inducted into Global Custodian's 'Legends of The Industry'.

Arthur Britto

President, Founder and Board Member

Arthur Britto co-founded Ripple and designed the XRP ledger. Ripple has grown to over $30 billion in assets in just 5 years. Prior to Ripple, Arthur was CEO of Information Access Technologies Inc., one of the first ISPs. Arthur is a renowned technical leader in the digital asset space.

Tim Keaney

Senior Advisor and Board Member

Tim Keaney was the Vice Chairman of BNY Mellon, where he oversaw the firm’s Investment Services businesses, including the Custody and Fund Administration Business with responsibility for the oversight of 25% of the world’s investable assets. Prior to that, he was the BNY Mellon Chairman of Europe, Middle East and Africa. He is also Chairman of the Risk and Finance Committee and member of the Audit Committee at UNUM, a Fortune 200 Insurance company.