Enigmail
Security extension to Mozilla Thunderbird and SeaMonkey.
Best Enigmail Alternatives & Competitors in 2024
The best Enigmail alternatives based on verified products, community votes, reviews and other factors.
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Open-Source Alternatives.
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Secure email with absolutely no compromises. Get your free encrypted email account today.
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Mailvelope open source project. OpenPGP in your browser.
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1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
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Get your encrypted mailbox for free.
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Kleopatra is a certificate manager and GUI for GnuPG.
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mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.
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GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
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OpenKeychain helps you communicate more privately and securely.
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SMS Plus app offers features that let you forward text messages through internet connection as well as through other social media platforms.
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Unofficial desktop app for ProtonMail and Tutanota end-to-end encrypted email providers
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GPGMail is an open source plugin for Apple Mail.
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YAATA app offers features that let you send multimedia files such as images, videos, audio, and GIFs, etc.
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Convenient End-to-End Encryption for E-Mail
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Unofficial webextension for ProtonMail