- CipherTrust
 - Enterprise email security including anti-spam and webmail protection. - HushMail
- Web-based fully encrypted email system.
- SecureNym
- Founded with the purpose of providing a private, anonymous email service.
- StealthMessage.com
- Secure messaging system designed for communicating sensitive and confidential information.
- Swissmail.org
- Offers secure email for business and personal use.
- MuteMail
- Allows users to send and receive anonymous email via an SSL connection.
- 4SecureMail.com
- Provides secure email accounts and hosting for consumers and business customers worldwide.
- SafeMessage
- Provides protected communications by encrypting all communications, providing known delivery status, and auto-erasing messages.
- KeptPrivate.com
- Secure web-based email service offers encrypted message storage and secure POP/IMAP and SMTP access.
- Yozons
- Offers a secure service that allows businesses to securely send, legally sign, store, and retrieve documents and messages from anywhere in the world.
- 42inc
- Features secure standards-based SMTP, POP, IMAP, and Webmail.
- Proof of Service - electronic (PoS-e)
- Certified Internet document delivery system that provides proof of what was served, upon whom, and when.
- Agenetics, Inc.
- Allows users to send and receive secure messages.
- Generalmail.com
- Premium secure service for business and personal use with encryption (SSL), web based email, and IMAP/POP3 access.
- FileFortress
- Secure, web-based email system for businesses.
- Nast-E-gram
- Service that anonymously sends specified messages to recipients as email or postal mail.
- VERIFY3
- Offers an email encryption, identity verification, and digital signatures system developed by Quadlogic Systems, which allows users to encrypt emails and attachments, such as accounts and databases.
- Neomailbox Secure Email
- Secure anonymous email and Internet privacy services. SSL encrypted IMAP, SMTP, and POP3. Webmail access with PGP encryption and digital signature support. Unlimited disposable email addresses and multiple spam and virus defences.
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