Custody refers to a financial institution holding client assets to prevent them from being stolen or lost. Custodians are different from banks as they can not leverage the assets they hold to their own ends.

What is Custody?

In the cryptocurrency industry, custodial solutions are a third party that holds the private keys to the user’s funds. They are the only ones able to actually send and receive the user’s coins. Virtually all exchanges use a custodial approach since it allows them to provide a better user experience.

Custodial vs non-custodial: the actual difference

Custodial means a third party holds your private keys and executes trades on your behalf — a traditional exchange account. You get a familiar login-and-trade experience, but you're trusting that party to stay solvent, stay online, and not freeze withdrawals. Non-custodial means you hold your own keys the entire time; a platform can only build the interface, it can never move your funds without your signature. The trade-off is real: custodial is easier for a beginner, non-custodial removes counterparty risk entirely because there is no counterparty holding your balance.

Zipmex is built non-custodial: you connect a wallet you already control and every trade settles on-chain, so there's no account balance sitting on a company's books to freeze, no withdrawal queue, and no KYC step — because there is nothing being custodied.

Self-custody in practice

Self-custody means the private key (or the seed phrase that generates it) never leaves a device you control. Lose that seed phrase and the funds are unrecoverable — there's no customer support line that can reset it, which is the same property that makes it impossible for anyone else to freeze or seize it either. That's the whole trade custody was invented to solve: convenience and recoverability, purchased by trusting someone else with the keys.