A simple directory of the best Bitcoin signing devices, metal seed backup tools, and supporting wallet software — because your sats are best stored cold.
Theya
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Theya
Bitcoin multisig custody for corporations, funds, and individuals. Role-based access, hardware wallet support, biometric auth, and offline vaults. Web and iOS.
Theya is a multisig Bitcoin custody platform designed for corporations, investment funds, financial advisors, DAOs, and sophisticated individuals who need collaborative Bitcoin custody at scale. It provides role-based access control, multi-user signing workflows, hardware wallet support (including the iPhone secure enclave as a hardware signing factor), passkey and biometric authentication (no passwords), offline vault access, device compromise reporting with rapid fund migration, and real-time transaction alerts. Theya is self-custodial — users retain complete control of their keys and funds. Available as an iOS app and a web application accessible from any desktop browser. Android support is planned. Note: source code is not publicly available.
