Tildamail - Tilda is private and secure email with decentalized storage.
docNCRYPT - docNCRYPT is a cybersecurity platform which only focuses on its core services in protecting your email directly from the different email service provider and allows you to integrate your business email portal in the online service.
Criptext - Criptext - Security that goes beyond encryption.
LuxSci - LuxSci providing HIPAA-compliant email, secure email & web services.
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
encryptomatic - encryptomatic is a smart email encryption software which provides tons of tools in encryption protocols for secure communication and business transaction.