Wallets: Custodial vs. Non-Custodial

A cryptocurrency wallet doesn't literally store coins the way a physical wallet stores cash — it stores the keys that prove ownership and let you move funds on the blockchain. Who actually holds those keys is the single most important distinction between different kinds of wallets.

A custodial wallet is one where a third party, typically a cryptocurrency exchange, holds the keys on your behalf. You log in with a username and password, much like a bank account, and the company handles the technical side. That convenience comes with a real catch: you're trusting that company to keep your funds safe, stay solvent, and let you withdraw whenever you want.

A non-custodial wallet, sometimes called a self-custody wallet, is one where you alone hold the keys, often as software on your own phone or computer, or on a dedicated hardware device. Nobody else can freeze or access your funds without your keys — but that also means there's no company to call and no password reset if you lose access yourself.

A wallet where a third party like an exchange holds your keys on your behalf is called a ____ wallet.

What's the key practical difference between a custodial and a non-custodial wallet?

With a non-custodial wallet, if you lose your own access, there's typically no company able to reset it for you.