Signal, the end-to-end encrypted messaging app, spends around $33 million annually to maintain its privacy systems and protect user data. The costs, which include $14 million for infrastructure and $19 million for staff, are expected to rise to $50 million by 2025. Despite being a non-profit, Signal needs to increase revenue without compromising its pro-user stance. The company, which has a unique approach to privacy protection, is primarily supported by donations and aims to be fully funded by small donors to ensure sustainability and avoid monetizing surveillance.