Alternatives to Gpg4win

MailHippo is aimed at healthcare providers, administrators, business associates, counselors, and other covered entities.

gpg4o suits Outlook users who need OpenPGP encryption, signing, and key management for confidential email.

DataMotion Secure Email Exchange

The service is aimed at healthcare, financial services, and government organizations with complex enterprise workflows.

Mailvelope

Mailvelope suits people who want PGP encryption for email through supported webmail services.

FlowCrypt

FlowCrypt suits individuals seeking encrypted email and organizations that need domain-wide controls.

Virtru Email Encryption

It suits people and teams that need protected email across the listed desktop and mobile platforms, particularly Outlook or Gmail users.

It suits Windows users who need local, end-to-end message and file encryption, especially Outlook users.

It is aimed at healthcare, finance and legal teams, MSPs, internal IT teams and compliance-driven organisations that need a self-hosted mail gateway.

PDF Postman suits Outlook users on Windows who need to send encrypted email messages or attachments as PDFs.

Virtru suits organizations protecting shared data across email, files, applications, and partner environments.

It suits organizations that need to share sensitive information with colleagues and partners by email.

Sophos Email suits organizations seeking email threat defense, data loss prevention, encryption, and user-awareness features.

It suits organizations seeking to protect sensitive communications with external partners and internal recipients.

Outbound Shield is presented for small and mid-size businesses, managed service providers, and regulated organizations such as legal, healthcare, and financial firms.

It suits managed service providers and organizations protecting sensitive email and files for small and medium-sized businesses.

It suits healthcare-oriented teams sending email through web, Outlook, or Gmail and requiring password-based recipient verification.

RMail

It suits individuals and organizations sending email with recipient verification, expiry, and attachment controls.