Signal is a widely used messaging app known for its strong privacy features. It uses the Signal Protocol, which is a leading end-to-end encryption technology used by other platforms like WhatsApp and Google Messages. Signal is a non-profit organization, which sets it apart from other tech companies that prioritize profit over privacy. The app is free to use and relies on donations to cover its costs. These costs include infrastructure, such as storage, servers, and bandwidth, as well as expenses related to registration fees and maintaining a dedicated team of employees. While Signal’s expenses are significant, they are necessary to provide a privacy-focused alternative in an industry dominated by profit-driven companies.
https://signal.org/blog/signal-is-expensive/