Clarity without exposure. Privacy is built into the architecture, not added as a setting.

Twin Ledger is built so only your household can see the full context: the financial picture, the travel schedule, and the plans that connect them. Accounts, trips, projects, and records are not used for advertising, tracking, or data resale.

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Private by design

Household records are organized as end-to-end encrypted vault files, so sync can move protected data without making the server the place where family meaning lives. Vault data is encrypted before it leaves your device, so Twin Ledger cannot read the contents of your household vault.

Family keychain

Access is based on family keys and sharing groups, with support for modern hybrid and quantum-resistant key approaches as household security expectations evolve. Each household member receives access through their own key material rather than a shared household secret.

Protected sync

Vault locks and file hashes help keep encrypted family data coordinated across devices, reducing drift while preserving a clear boundary around private context. Financial details stay in your household vault and are not shared through the shared itinerary system.

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Read more

Privacy in practice: plain-language notes on what Twin Ledger can and cannot see, Plaid staging, data retention, and more.
Security architecture: technical overview of the family vault, key architecture, cryptography, and threat model.