EncryptUs by Firetrust is an email encryption software that provides end-to-end encryption for secure email communication. It operates automatically in the background, encrypting and decrypting emails while managing cryptographic keys. EncryptUs utilizes the PGP (Pretty Good Privacy) system to simplify sending and receiving encrypted emails. It uses strong Elliptic Curve Cryptography (Curve 25519) for encryption. EncryptUs currently runs on Android devices through the FireMail app, with plans for Windows, Mac, Linux, and iOS support. It offers both free and paid versions, with the paid version likely providing unique encryption keys for users.