Breez Partners With Turnkey to Bring Non-Custodial Bitcoin to Backend-Run Apps
Breez has partnered with Turnkey to enable backend-run applications to integrate non-custodial Bitcoin wallets at scale, allowing users to control their funds without companies holding private keys.
Intelligence analysis by Gemini 2.5 Flash

This partnership addresses a significant challenge for mainstream apps that operate from a central backend, which traditionally would require them to become custodians of user funds. By leveraging Turnkey's secure enclaves and passkeys, apps can now offer non-custodial Bitcoin services, shifting control to users and reducing regulatory and security burdens for companies.
Imagine you have a special digital piggy bank for your money, and a big app wants to help you use it. Usually, the app would have to hold the key to your piggy bank, which is a big responsibility for them. But now, thanks to Breez and Turnkey, the app can help you use your piggy bank without ever touching your key. Your key is kept super safe in a special digital vault, and only you can use a secret handshake (like a passkey) to open it and spend your money, even though the app helps you see what's inside.
Analysis
Addressing the Custody Conundrum for Scalable Apps
Historically, integrating Bitcoin into large-scale, backend-run consumer applications presented a significant dilemma. These applications, designed to serve millions of users from a single service, would typically need to manage user private keys on their servers. This practice immediately designates the company as a custodian, a status that comes with substantial regulatory licensing requirements, increased legal liability, and the immense security burden of safeguarding vast amounts of user funds. The alternative, building separate device-based wallets, often proved incompatible with the existing architectural designs that enable these apps to achieve their scale, forcing a difficult choice between user control and operational efficiency.
Turnkey's Secure Enclave and Passkey Solution
The partnership between Breez and Turnkey introduces an innovative solution to this structural problem. Under their new model, each user's Bitcoin wallet keys are generated and securely stored within Turnkey’s secure enclaves. Crucially, these keys remain inaccessible to the application's servers, Breez, and even Turnkey itself. The application's backend holds only a credential that defines the actions it can initiate, while the ultimate authority to move funds rests solely with the user, typically through a registered passkey. This mechanism allows the app to prepare transactions, displaying details like amount, fee, and destination, but requires explicit user approval for completion, ensuring that the server cannot spend funds without consent. This approach effectively enables non-custodial Bitcoin integration without requiring companies to redesign their core backend infrastructure or assume custodial responsibilities.
Broadening Bitcoin and Stablecoin Adoption
This collaboration significantly lowers the barriers for various financial entities, including exchanges, fintechs, and neobanks, to offer non-custodial Bitcoin and stablecoin services to their extensive user bases. By removing the need for companies to hold private keys, it mitigates the regulatory and security overheads that have previously deterred many from entering the crypto space. For instance, exchanges can automate payouts under predefined security rules, and fintechs can seamlessly embed non-custodial Bitcoin services directly into their existing user interfaces. Combined with Breez SDK features like Passkey Login, Stable Balance for price volatility, and support for USDT/USDC stablecoins, the integrated tools empower backend-run products to provide robust crypto services while ensuring users retain full custody of their assets. This strategic move is poised to expand mainstream access to Bitcoin and stablecoins, fostering greater adoption within traditional financial ecosystems.
Key points
- Breez and Turnkey partnered to enable non-custodial Bitcoin wallets in backend-run applications.
- The solution allows apps to manage user wallets without holding private keys, reducing regulatory and security burdens.
- User keys are stored in Turnkey's secure enclaves, with transaction approval requiring user passkeys.
- This model helps exchanges, fintechs, and neobanks offer Bitcoin and stablecoin services at scale.
- The partnership aims to lower barriers to Bitcoin integration and promote self-custody for mainstream users.
This partnership could significantly accelerate mainstream adoption of Bitcoin by enabling large consumer apps to offer non-custodial services, reducing regulatory hurdles and security risks for companies. Users could benefit from enhanced control over their funds within familiar interfaces, making self-custody more accessible and less intimidating.
While promising, the success of this model hinges on widespread user adoption of passkeys for transaction approval and the continued security integrity of Turnkey's enclaves, as any compromise there could undermine the non-custodial promise. Furthermore, integrating new technologies into complex backend systems may present unforeseen technical challenges.



