Keybase

Keybase is a security-focused platform that offers end-to-end encrypted chat, file sharing, and git repositories. It allows users to cryptographically prove their identity across multiple online platforms, linking social media profiles and websites to their Keybase account.

The service is designed for individuals and teams who require secure communication and collaboration tools. It's used for private messaging, sharing sensitive documents, and managing code with strong cryptographic assurances, aiming to prevent unauthorized access to data.