Best Email Encryption Software in 2026
Updated
In short: Lockbin is ranked #1 of 28 as of 2 October 2026, ahead of SecureMyEmail and gpg4o. The best-ranked option with a free plan is SecureMyEmail. The lowest first paid tier on this page is Cryptshare.express at €0.42/mo.
Email encryption software is for sending messages with security and delivery controls. Compare secure delivery and recipient verification, then look at attachment limits and message expiry to understand the listed options for handling message content and access. Gmail and Outlook integration can help you assess fit with an existing email service, while admin access controls matter when comparing administrative capabilities. Free-plan availability and paid-from pricing add cost details. The ranking begins with FlowCrypt and Mailvelope, followed by c.Email and SecureMyEmail. DataMotion Secure Email Exchange, MailHippo, Lockbin, and gpg4o appear among the first entries as well.
28 email encryption software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
5 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | LockbinWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $10/mo | 6.6 | |
| 2 | SecureMyEmailWindows · Mac · Android · iPhone | Three bars | — | 4 of 6 | Free | 6.5 | |
| 3 | gpg4oWindows | Two bars | — | 1 of 6 | €99.95/mo | 6.4 | |
| 4 | c.EmailExtension | Two bars | — | 0 of 6 | Free | 6.3 | |
| 5 | FlowCryptExtension | Two bars | — | 0 of 6 | Free | 6.3 | |
| 6 | DataMotion Secure Email ExchangeWeb · Android · iPhone · API | Two bars | — | — | 3 of 6 | — | 5.6 |
| 7 | Mimecast Secure MessagingWeb · Windows · Mac | Two bars | — | — | 3 of 6 | — | 5.5 |
| 8 | RMailWeb · Windows · Mac | Two bars | — | — | 3 of 6 | — | 5.5 |
| 9 | Encryptomatic OpenPGPWindows | One bar | — | — | 1 of 6 | $2.50/mo | 5.4 |
| 10 | Gpg4winWindows | One bar | — | — | 1 of 6 | — | 5.4 |
| 11 | MailvelopeWeb · Extension | One bar | — | — | 1 of 6 | €3/mo | 5.4 |
| 12 | PDF PostmanWindows | One bar | — | — | 1 of 6 | $79.99/mo | 5.4 |
| 13 | Secure MessageWeb · Linux | One bar | — | — | 2 of 6 | — | 5.4 |
| 14 | Proofpoint Email DLP and EncryptionWeb · Windows · Android · iPhone | Two bars | — | — | 4 of 6 | — | 5.3 |
| 15 | Send It SecureNo platforms listed | One bar | — | — | 0 of 6 | — | 5.3 |
| 16 | Symantec IT Management SuiteWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 17 | Virtru Email EncryptionWeb · Windows · Mac · Android · iPhone | Two bars | — | — | 5 of 6 | $119/mo | 5.3 |
| 18 | OpenText Core Email EncryptionNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 19 | Sophos Secure MessageNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 20 | MailHippoWeb · Windows · API | One bar | — | — | 2 of 6 | $4.95/mo | 5.1 |
| 21 | Virtru Data Security PlatformWeb · Windows · Self-hosted · API | One bar | — | — | 2 of 6 | $119/mo | 5.1 |
| 22 | OpenText Core Email Message PrivacyWeb | One bar | — | — | 1 of 6 | — | 5.0 |
| 23 | Cryptshare.expressWeb | One bar | — | — | 1 of 6 | €0.42/mo | 4.9 |
| 24 | KnowBe4Web | One bar | — | — | 1 of 6 | $2.40/mo | 4.9 |
| 25 | Paubox Email EncryptionWeb | One bar | — | — | 1 of 6 | $29/mo | 4.9 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which email encryption software is ranked first on Freedom251?
Lockbin is ranked #1 of 28 with a score of 6.6. SecureMyEmail is second and gpg4o third.
How many of these have a free plan?
5 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Cryptshare.express has the lowest first paid tier we found: €0.42/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.