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Best Email Encryption Software in 2026

Protecting sensitive email involves more than encrypting message content: delivery, recipient checks, and access controls all shape how a tool fits your workflow. Compare secure delivery and recipient verification, then consider attachment limits and message expiry for the messages you send. Gmail and Outlook integration can help you assess compatibility with the services you use, while admin access controls offer another point of comparison. Free-plan availability and paid-from pricing help frame costs. Lockbin, SecureMyEmail, and gpg4o are among the entries shown, with c.Email and FlowCrypt also represented. Use these criteria to weigh sending requirements against the controls available to recipients and administrators.

  1. 1

    DataMotion Secure Email Exchange

    by DataMotion Secure Email Exchange
    Free plan AndroidAPIiPhone+1

    Choose DataMotion Secure Email Exchange if an organization needs encrypted email, recipient access without portal steps, and message tracking.

    7.6 Free plan · pricing on request Visit site
  2. 2

    Lockbin

    Free plan LinuxMacWeb+1

    Lockbin provides password-protected message access, encrypted storage and transit, and file collection options for paid users.

    7.4 Free plan · paid from $10/user/mo Visit site
  3. 3

    c.Email

    by c.Email
    Free plan Extension

    c.Email offers a free way to add encryption and sender verification to an existing Gmail or Outlook address.

    7.3 Free plan Visit site
  4. 4

    Encryptomatic OpenPGP

    by Encryptomatic OpenPGP
    Free plan Windows

    Encryptomatic OpenPGP combines local, end-to-end message encryption with file signing and Outlook integration on Windows.

    7.1 Free plan · paid from $29.99/yr Visit site
  5. 5

    FlowCrypt

    by FlowCrypt
    Free plan Extension

    FlowCrypt offers encrypted email for individual use and adds domain controls, authentication options and integrations for enterprise.

    7.1 Free plan Visit site
  6. 6

    gpg4o

    by gpg4o
    Free plan Windows

    gpg4o combines Outlook-based OpenPGP email protection with key-management and enterprise features.

    7.1 Free plan · paid from €99.95 · 180-day trial Visit site
  7. 7

    Mailvelope

    by Mailvelope
    Free plan ExtensionWeb

    Mailvelope provides PGP encryption for supported webmail, with key management and attachment support.

    7.1 Free plan · paid from €3/user/mo · 14-day trial Visit site
  8. 8

    SecureMyEmail

    by SecureMyEmail
    Free plan AndroidiPhoneMac+2

    Choose SecureMyEmail if you want end-to-end encrypted email with an existing provider and need access on desktop and mobile platforms.

    7.1 Free plan · 30-day trial Visit site
  9. 9

    Send It Secure

    Free plan APIExtensioniPhone+2

    Choose Send It Secure if your organization needs encrypted email messaging with recipient verification, message controls, and Outlook support.

    7.1 Free plan Visit site
  10. 10

    Gpg4win

    Free plan Windows

    Choose Gpg4win if you use Windows and want file or email encryption with Outlook integration and administrator access controls.

    7.0 Free plan Visit site
  11. 11

    GPG Suite

    by GPG Suite
    Free plan Mac

    Choose GPG Suite if you use macOS and want integrated Apple Mail tools alongside key management and Services menu actions.

    7.0 30-day trial Visit site
  12. 12

    Secure Message

    Free plan LinuxSelf-hostedWeb

    Choose Secure Message if your team wants a self-hosted mail gateway with filtering, quarantine and administrator controls.

    7.0 Free plan · paid from $690/yr Visit site
  13. 13

    Virtru Email Encryption

    by Virtru Email Encryption
    Free plan AndroidAPIExtension+5

    Choose Virtru Email Encryption if your email workflow needs link-based secure delivery, identity verification, message expiry, and Outlook or Gmail integration.

    6.9 From $119/mo (annual) Visit site
  14. 14

    PDF Postman

    by PDF Postman
    Free plan Windows

    PDF Postman focuses on turning Outlook messages and attachments into password-protected PDFs, with several ways to handle attachments.

    6.7 Free plan · paid from $79.99 · 15-day trial Visit site
  15. 15

    Cisco Catalyst Center

    Paid APILinuxMac+3
    6.1 Pricing on request Visit site
  16. 16

    MailHippo

    by MailHippo
    Free trial APIWebWindows

    MailHippo combines encrypted messaging, access records, and a HIPAA Business Associate Agreement across its plans.

    6.1 From $4.95/user/mo · 30-day trial Visit site
  17. 17

    Microsoft Exchange Online

    by Microsoft Exchange Online
    Paid AndroidiPhoneMac+2

    Exchange Online combines hosted business email with administration, security, and compliance capabilities.

    5.7 Visit site
  18. 18

    Mimecast Secure Messaging

    by Mimecast Secure Messaging
    Paid AndroidiPhoneMac+2

    Mimecast Secure Messaging provides portal delivery with sender controls and automated policy triggers for sensitive email.

    5.7 Pricing on request Visit site
  19. 19

    Cryptshare.express

    by Cryptshare.express
    Paid Web

    Cryptshare.express provides portal-based delivery with password verification and expiring messages. Review the subscription billing details, VAT exclusion, and transfer limits before selecting a plan.

    5.6 From €5/user/mo (annual) · 7-day trial Visit site
  20. 20

    Sophos Secure Message

    by Sophos Secure Message
    Free trial Web

    Choose Sophos Email if your organization needs inbox threat protection alongside email encryption and data loss prevention.

    5.5 Pricing on request Visit site
  21. 21

    KnowBe4

    by KnowBe4
    Paid Web

    KnowBe4 combines security awareness training with phishing simulations, reporting, and incident-related capabilities. It has no free plan, and its listed paid plans require a 3 year term.

    5.4 From $2.40/user/mo Visit site
  22. 22

    RMail

    by RMail
    Paid WebWindowsMac
    5.4 Visit site
  23. 23

    Symantec PGP Gateway Email Encryption

    Paid LinuxSelf-hostedWeb+1
    5.4 Pricing on request Visit site
  24. 24

    Virtru Data Security Platform

    by Virtru Data Security Platform
    Paid AndroidAPIExtension+6

    Choose Virtru if you need controls that can travel with shared data and support access revocation, audit telemetry, and multiple deployment models.

    5.4 From $119/mo (annual) Visit site
  25. 25

    Proofpoint Email DLP and Encryption

    by Proofpoint Email DLP and Encryption
    Paid AndroidiPhoneWeb+1

    Proofpoint combines email content detection, policy-driven encryption, and centralized incident review.

    5.3 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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