MailStore - MailStore Home - A 100% free single-private-user desktop solution
FastMail - Email, calendars, and contacts to highest standards of security, privacy and reliability.
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.
Loop Email - Emailing for teams: Organize your Inbox into channels 💌
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.