Onyx is a modern private bank for the next generation of HNWI. We provide a digital white-glove service for all your personal finance, banking, wealth and lifestyle needs. *Onyx is a financial technology company and is not a bank. Banking services provided by Piermont Bank; Member FDIC. Deposits are insured to the maximum amounts permissible by law. The Onyx Visa® Debit Card is issued by Piermont Bank pursuant to a license from Visa U.S.A. Inc. and may be used everywhere Visa debit cards are accepted.