ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.
Skizzle Email - Skizzle is the most secure way to share end-to-end encrypted files through email, backed by blockchain
Hornetsecurity Email Archiving - Hornetsecurity Email Archiving is one of the advanced software that offers long-term, unchangeable, and secure storage of important company information, data, and flies.