Enigmail is described as 'Security extension to Mozilla Thunderbird and SeaMonkey. It enables you to write and receive email messages signed and/or encrypted with the ' and is a popular file encryption software in the security & privacy category. There are more than 25 alternatives to Enigmail for a variety of platforms, including Web-based, Mac, Linux, Windows and Android apps. The best Enigmail alternative is Tuta Mail, which is both free and Open Source. Other great apps like Enigmail are GnuPG, mailbox, OpenKeychain and Mailvelope.
Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.
Germany
EU
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
GermanyEU
E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
GermanyEU
OpenKeychain helps you communicate more privately and securely. It uses high-quality modern encryption to ensure that your messages can be read only by the people you send them to, others can send you messages that only you can read, and these messages can be digitally signed so...
GermanyEU
Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard.
GermanyEU
App to sync encrypted emails from Proton Mail with desktop email clients such as Mozilla Thunderbird, Apple Mail, and Microsoft Outlook.
Switzerland
Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...
Norway
GPGMail is a PGP plugin for Apple Mail. It brings the functionality to sign, verify, encrypt and decrypt mails using the OpenPGP standard.
ElectronMail is an Electron-based unofficial desktop client for ProtonMail end-to-end encrypted email provider. The app aims to provide enhanced desktop user experience enabling features that are not supported by the official in-browser web clients.
FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.
United States
Free anonymous email platform offering automatic PGP encryption, dedicated Tor .onion address, strict no-logs policy, no personal data or phone required, and anonymous payments through Monero, Bitcoin, Ethereum, or credit card. Compatible with Tor and web browsers.
United States
CipherMail for Android is an Android application which can be used with your existing Android mail application to send and receive S/MIME digitally signed and encrypted email with an Android smartphone.
