Custody describes who controls the cryptographic keys or account infrastructure needed to authorize digital-asset transactions.

Educational scope. This guide explains technology and terminology. It does not offer investment advice, trading signals, wallet services, exchange services, staking services or projected financial returns.

What you'll understand

  • A custodial provider manages private keys or equivalent account controls for users.
  • In a non-custodial model, the user controls private keys or a recovery phrase.
  • Some applications place assets under smart-contract rules rather than a traditional company-controlled wallet.
  • This comparison is intended to explain architecture.

Custodial model

A custodial provider manages private keys or equivalent account controls for users. This can simplify recovery and user experience, but it introduces reliance on the provider.

The provider's legal structure, security and withdrawal policies become important parts of the system.

Non-custodial model

In a non-custodial model, the user controls private keys or a recovery phrase. This reduces reliance on a central custodian but increases the user's responsibility for backup and device security.

Lost key material may be impossible for a third party to restore.

Smart-contract custody

Some applications place assets under smart-contract rules rather than a traditional company-controlled wallet. That changes the architecture but does not eliminate risk; smart contracts can contain bugs or depend on external systems.

Users should distinguish automated rules from guarantees.

Educational purpose

This comparison is intended to explain architecture. It does not recommend a wallet, exchange, staking service or custody model.

Key takeaway

The clearest way to understand this topic is to separate the protocol, the digital asset, the software interface and any third-party service. Each layer has different responsibilities, dependencies and risks.