Best DigiCert Secure Email (S/MIME) Certs Alternatives & Competitors in 2026

Egress Protect

End-to-end email encryption with DLP and access controls for Microsoft 365

Zivver Secure Email Gateway

Secure email gateway with automated DLP and zero-knowledge encryption

ShareFile Email & File Encryption

Email and file encryption solution for secure data sharing and storage

Beyond Encryption Mailock® Secure Email

Encrypted email platform with recipient verification, tracking, and revocation.

Beyond Encryption Mailock for Outlook

Outlook add-in for end-to-end email encryption with recipient auth & revoke.

Beyond Encryption Mailock Enterprise

Enterprise secure email gateway with AES-256 encryption & recipient auth.

Beyond Encryption Mailock for M365

AES-256 encrypted email add-on for M365 with auth & revocation.

FTAPI SecuMails

Encrypted email solution for GDPR-compliant sending via Outlook or browser.

Intermedia Email Encryption

Cloud-based email encryption service using PKI, S/MIME & X.509 for orgs.

PreVeil Security

End-to-end encrypted email & file sharing with zero-trust architecture.

PreVeil Admin Features

Enterprise admin module for encrypted email & file sharing with E-discovery controls.

PreVeil Email

E2E encrypted email for regulated industries handling CUI and ITAR data.

Sekur Private Data

Swiss-hosted secure email, messaging, and VPN suite for private comms.

StealthMail

Enterprise email security via encrypted stealth-links, bypassing SMTP vulnerabilities.

TitanHQ EncryptTitan

Email encryption solution for secure information exchange via email

Kiteworks Secure Email

Secure email platform with encryption, DLP, and policy automation

INKY Email Encryption

Email encryption solution for securing sensitive data in email communications

Galaxkey Email Encryption Software

Email encryption software using FIPS 140-2 compliant modules and RSA keys

Retarus Enterprise Cloud Fax

Cloud-based enterprise fax service for secure document transmission

Virtru Email Encryption

End-to-end email encryption for Gmail and Outlook with access controls

Seclore Email Encryption

Email encryption solution with access control, tracking, and revocation

RPost RMail Email Encryption

Email encryption service with automated delivery and compliance tracking

SecurelyShare for Email

End-to-end email encryption solution with centralized policy management

Beyond Encryption Mailock Automated

Automated bulk secure email encryption & delivery for enterprise orgs.

CloudMask Secure Gmail

End-to-end Gmail encryption with user-controlled keys and trusted contacts.

Echoworx Branding as a Service

White-label branding layer for Echoworx's email encryption platform.

FTAPI Platform

Secure file transfer & data workflow platform with E2E encryption.

SalaX Secure Mail

Email encryption solution for secure organizational communications.

Trustifi Outbound Shield

Outbound email security with automated encryption and DLP for compliance

Smartlockr Secure Email for Recruiters

Secure email solution for recruiters to encrypt and share sensitive candidate data

Beyond Encryption Mailock Free

Free encrypted email tool with Q&A recipient auth for individuals.

PreVeil

Free E2E encrypted email & file sharing for browser and desktop.

Nightfall Data Encryption

AI-powered email encryption solution for compliance with HIPAA, FINRA, FERPA

Virtru Gmail Encryption

End-to-end email encryption for Gmail with granular access controls

OpenText Core Email Encryption

Cloud-based email encryption with automated DLP policies and delivery methods

Paubox Email Encryption

HIPAA-compliant email encryption for Google Workspace and Microsoft 365