Messages are stored on ProtonMail servers in encrypted format. They are also transmitted in encrypted format between their servers and user devices. Messages between ProtonMail users are also transmitted in encrypted form within their secure server network. Protonmail allows you to send encrypted email to non protonmail accounts with a password decryption option. Currently there is minimal support for PGP/GPG PKI; you are given your public key to send to others so they can encrypt messages to you. Full PGP functionality is on their future features list. Protonmail offers free email accounts and paid options. Android and iOS apps available. Protonmail is Open Source. Also accessible on the TOR network: https://protonirockerxow.onion/.
ProtonMail now supports IMAP/SMTP in desktop environments (Windows and MacOS now, Linux coming soon). This means you can now use ProtonMail with your favorite desktop email applications such as Apple Mail, Microsoft Outlook, or Thunderbird, while still benefiting from the end-to-end encryption and zero-access encryption that ProtonMail provides. IMAP support is now available for all paid users via the ProtonMail Bridge. You can learn more about the ProtonMail Bridge here.
Protonmail offers a VPN service which we have reviewed here.
Mailfence is a paid service hosted in Belgium. It uses a non-US SSL/TLS certificate. They provide end-to-end encryption which makes eavesdropping impossible and renders intercepted data utterly useless, all the encryption/decryption & digital signing occur in the user’s browser. They also offer digital signing capability for authenticating digital messages and documents. Mailfence uses OpenPGP and the paid version has available protocols IMAP, POP, SMTP. With paid versions you can use Mailfence with apps like P≡P, or K9 Mail. Their cryptography application is Open Source and tested in 2014. More about Mailfence design philosophy is here. Mailfence is developing apps.
Tutanota automatically encrypts all your data on your device. Your emails as well as your contacts stay private. You can easily communicate with any of your friends on end-to-end encrypted. Even subject and attachments as well as all your contacts are encrypted however Tutanota does not use PGP for encryption and they explain why. Tutanota offers free email service with a minimal cost upgrade monthly option. Android and iOS apps available for this service. Tutanota is Open Source.
Mail2Tor is a free anonymous e-mail service to protect your privacy. It is produced independently from The Tor Project. It allows anyone to send and receive email anonymously via webmail or with an email client. You will need to have the Tor browser installed on your computer to access Mail2Tor, or Orbot on your smartphone. You can also use email clients like P≡P over Imap for end to end encryption with others. To access the site, in your Tor browser visit this link: mail2tor2zyjdctd.onion
Shazzle Mail takes an entirely different approach to email. Instead of storing your email on their servers, your devices become the servers. ShazzleMail is a free private email application that turns your smart phone or computers into a mail server, delivering your messages directly to your receiver via an SSL encrypted channel with no server copies. Not even Shazzle gets a copy. You can also send private email to anyone on your contacts. It works with iOS, Android devices and on a PC or Mac laptop/desktop. No apps available for this service.
Invmail is a secure zero-knowledge communications platform, offering services such as e-mail, video/voice calling, messaging capabilities. Data-servers are located in Switzerland, email uses 4096 bit End-to-End Encryption with PKI. Invmail offers free email with the option to upgrade for encrypted voice and messaging with more storage. No apps for this service. It doesn’t appear Invmail has been updated in awhile and they have not responded to our email. Update: Invmail appears to be back online after an outage.
Opensource end-to-end encrypted email service, allows for the use of personal encryption keys. Servers are currently located in the United States and will be offering servers elsewhere at some point. SCRYPTmail offers free email accounts with the option to upgrade for more storage and option. We liked the fact you can use a limited amount disposable email aliases with your account for free, more with a service upgrade. No apps or IMAP available for this service yet. Our review. Also accessible on the TOR network: http://scryptmaildniwm6.onion.
CounterMail is a secure and easy to use online email service, designed to provide maximum security and privacy without any unnecessary complexity. Countermail uses OpenPGP, with 4096 bits encryption keys. Their servers do not use any hard drives and instead start from a CD-ROM. This ensures that everything possible is being done to keep your anonymity. Countermail is a paid service only. No apps for this service however you can use imap with apps like P≡P, or K9 Mail. Countermail’s Java Applet is Open Source.
VFEmail provides standards compliant POP, IMAP, and SMTP interfaces with SSL encryption, and also provides an easy to use and convenient web interface with PGP support. It uses the ‘Horde’ webmail interface includes inline HTML, MS Word, and MS Excel document viewers. It will also recognize your mobile device and automatically display a ‘mobile’ version of webmail when you login. There is also a shareable calendar, address book, notes and a task list. VFEmail also supports individual Email forwarding, aliases, vacation messages, domain forwarding, ftp storage, Email search. VFEmail also uses a unique “Metadata Mitigator” which automatically rewrites the ‘From’ address on the email envelope to a unique address for each email sent – creating virtual forwarding PO Boxes – which renders the gathering and cataloging useless as your real email address is never shown.
Use Your Own Email
Pretty Easy Privacy (p≡p), is an open source app created by the Swiss-based p≡p foundation. P≡P allows you to use your existing email account and easily send and receive PGP encrypted email to others who either use p≡p or have their own PGP keys. Currently p≡p is available for the Android, Windows Outlook add-on version with a Windows Outlook Reader Only and the iPhone in the works. p≡p code is also already included in Thunderbird/Enigmail add-on and will be used by default later with Enigmail v2.0. You can also find p≡p in the F-Droid app market for download.
SecureMyEmail™ is modern email software with end-to-end encryption built-in. Easily encrypt your Gmail, Yahoo Mail, Outlook, or most any other email address, in just a few minutes. It costs .99¢ per year.
Use your existing email address, such as your work email, Gmail, Outlook.com or Yahoo Mail etc. with confidence, for all your email communication. Your messages are anonymized, encrypted and metadata-free. Communicate seamlessly not only with EasyCrypt subscribers but also with external PGP users. PGP users who decide to join EasyCrypt for added metadata protection and anonymity, can import their keys. Email will be stored at your existing email service.