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Best Microsoft Exchange Online Alternatives in 2026

12 apps from email encryption software ranked against Microsoft Exchange Online on the same published basis.

  1. 1
    Lockbin Free plan LinuxMacWebWin $10/mo7.3
    Microsoft Exchange Online vs Lockbin
  2. 2
    DataMotion Secure Email Exchange Free trial AndroidapiiOSWeb 7.1
    Microsoft Exchange Online vs DataMotion Secure Email Exchange
  3. 3
    Encryptomatic OpenPGP Win $2.50/mo6.9
    Microsoft Exchange Online vs Encryptomatic OpenPGP
  4. 4
    gpg4o Free plan Win €99.95/mo6.9
    Microsoft Exchange Online vs gpg4o
  5. 5
    Mailvelope Free trial extensionWeb €3/mo6.9
    Microsoft Exchange Online vs Mailvelope
  6. 6
    FlowCrypt Free plan extension Free6.8
    Microsoft Exchange Online vs FlowCrypt
  7. 7
    Gpg4win Win 6.8
    Microsoft Exchange Online vs Gpg4win
  8. 8
    PDF Postman Win $79.99/mo6.8
    Microsoft Exchange Online vs PDF Postman
  9. 9
    SecureMyEmail Free plan WinMaciOSAndroid Free6.8
    Microsoft Exchange Online vs SecureMyEmail
  10. 10
    c.Email Free plan extension Free6.7
    Microsoft Exchange Online vs c.Email
  11. 11
    Proofpoint Email DLP and Encryption AndroidiOSWebWin 6.6
    Microsoft Exchange Online vs Proofpoint Email DLP and Encryption
  12. 12
    Secure Message WebLinux 6.6
    Microsoft Exchange Online vs Secure Message
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