Custodial Wallet
A crypto wallet where a third party holds and controls the private keys on the user's behalf.
What is Custodial Wallet?
A custodial wallet is a cryptocurrency wallet in which a third-party service — typically a centralized exchange or broker — generates and stores the user's private keys on their behalf. When using a custodial wallet, the user does not directly control the private keys; they access their funds through the service's interface using a username and password. This arrangement is similar to holding cash in a bank: the institution safeguards the assets, but the user is exposed to counterparty risk if the institution is hacked, becomes insolvent, or freezes withdrawals. The advantage is convenience — password recovery, customer support, and simplified on-boarding. The risk is loss of direct ownership, encapsulated by the crypto community phrase 'not your keys, not your coins.'
Example
When users held Bitcoin on the FTX exchange before its 2022 bankruptcy, they were using a custodial arrangement. FTX held the private keys; users had only a claim on those assets. When FTX collapsed, withdrawals were frozen and customer funds were largely lost. Non-custodial wallet holders were unaffected.