Apps similar to Proton Mail with Affiliate Programs

This secure email platform offers end-to-end encryption, a comprehensive suite with Calendar and Documents. Mailfence is inter-operable with OpenPGP services, features digital signatures, provides keystores, and available as a PWA for mobile independence while ensuring no ads, trackers, or surveillance.

Privacy-focused email service offering easy one-click PGP encryption, 20 GB storage, disposable email addresses, and compatibility with IMAP/SMTP while adhering to Dutch privacy laws to secure data and communications effectively.

Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email programs. Excellent for businesses with compliance features.

Infomaniak’s Mail Service is a secure emailing system hosted in Switzerland and is the best (free) alternative to the web giants. Infomaniak’s emailing service is used by more than a million companies and individuals throughout Europe.

Thexyz build the best tools around for email to make your life simple. Continually updating the product offerings to give customers the very best in email and domain technology.

Providing HIPAA-compliant email, secure email & web services since 1999. Secure communications via email, text, chat, video, and web.

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.