Founded in 2018, Casa is a security and financial technology company focused on empowering individuals to have full control and sovereignty over their digital wealth, primarily Bitcoin. The company's mission is to provide the best tools for secure self-custody, moving beyond the risks associated with storing assets on exchanges or with single-point-of-failure hardware wallets. Casa's core offering is a multi-signature (multisig) wallet service that requires multiple keys to authorize a transaction, significantly enhancing security against theft, accidents, and single points of failure. They offer tiered subscription plans for different levels of security and support, catering to both new crypto users and high-net-worth individuals.