> ## Documentation Index > Fetch the complete documentation index at: https://zyfai.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Nested Safe Every standard Zyfai Smart Account is a Safe Smart Account deployed by the user's EOA. A Nested Safe follows the same model, but is deployed by another Safe Smart Account rather than an EOA. This is the foundational infrastructure behind Zyfai's institutional offering: direct, unshared ownership within existing multisig rails, with zero counterparty risk from other users in the system. The model aligns with the traditional **Separately Managed Account (SMA)** structure used in TradFi. ### For Institutions: Multisig-Controlled Agents Nested Safe eliminates the need for an EOA to deploy a Zyfai Smart Account. Instead, an institution's existing multisig infrastructure holds all deposited capital directly: a critical requirement for compliance, internal governance, and institutional capital allocation. The result is the operational benefit of automated yield management with transparent, segregated custody. How the structure works: * **Multisig at the top level:** your existing Safe acts as the controlling multisig. * **Agent Smart Account underneath:** the Agent operates through a nested Smart Account ([Safe7579](/docs/product/infra/safe7579)) that is owned and controlled by your multisig. * **Granular delegation via Session Keys:** [Session Keys](/docs/product/control/session-keys) restrict what the Agent can do, which protocols it can access, and which contracts it can call. All parameters are defined and approved by you. This design ensures that: * The Agent can rebalance and manage positions efficiently. * The multisig always remains the ultimate owner and authority. * No centralized operator, including Zyfai, can unilaterally move funds. To access your Safe multisig outside of Zyfai, head to our guide: [Use Zyfai via Safe Global](/docs/product/ecosystem/resources/safe-guide).