Multi-Party Computation as a Service

Multi-party computation as a service describes companies that sell multi-party computation (MPC) technology to other businesses as a ready-made product, usually for securing crypto assets. Instead of building their own cryptography, exchanges, fintech apps, banks and payment firms connect to the provider through an API or software kit. The provider's system splits each private key into shares held by different parties, such as the client, the provider and a backup service, and signs transactions jointly without ever assembling the full key, as in an MPC wallet. Services often add approval workflows, address allow-lists and policy engines. The model speeds up launch and spreads risk, but clients depend on the provider's availability, code quality and recovery arrangements, and regulators may treat some set-ups as a form of crypto custody, so who controls which key shares matters legally as well as technically.