1. ProtonMailProtonMail is one of the best secure email service providers throughout the globe. To add to their credit, Forbes once called the “The only email system NSA can’t access.” The servers of ProtonMail are located in Switzerland so that US government cannot easily get access or order the company to reveal the data.
The emails are always end to end encrypted for better privacy and security.On more cool feature is that they do not log out IP addresses which keep us completely anonymous.
Currently, due to lack of their storage data, new users are given accounts only through invites. It provides free as well as premium service which is worth the money.
2. TutanotaTutanota is also an end-to-end encryption free secure email service. It is entirely open-source. The best part of their service is that they give the ability for non-Tutanota users to securely respond to encrypted emails. The emails are password protected and even after receiving without the password one cannot unlock the content of the email. There is also an option not to encrypt the mail but honestly that makes no sense of using Tutanota.
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Free users get 1 GB data storage while the premium gets five aliases and our very own domain for just €1/month.
The good thing is they are available as mobile applications in both the Android and iOS.
3. Posteo.dePosteo.de is a Berlin-based secure email service provider. They are clear on their priorities about privacy and security. The famous two-factor authentication is available, which prevents the access to our accounts even if your password is compromised. They do not request any personal information while creating an account and we can opt to stay anonymous and they allow us to pay anonymously using bank transfer, cash or Paypal.
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One drawback is that they are not available for free. The have various plans starting at €1/month for 2 GB storage capacity with POP3 and IMAP support.
4. Kolab NowKolab Now is another open-source email service provider. Just like with ProtonMail Kolab Now servers are present at Switzerland so as explained earlier our data will be so safe there. They actually target small and medium-sized enterprises, who want to pass privileged information through email.
They also have some add-on features which includes an integrated note-taking app, contacts and calendar, email tagging support, shared folders and much more.
It has various plans like Posteo.de charging its users directly starting from $4.99 for an individual account.
5. CountermailCountermail is also one of the top secure email service providers. They offer some unique features by using OpenPGP’s encryption protocol with 4096 keys to protect your data and also provides end-to-end encryption. It also provides a secure USB key option which makes the access to our accounts impossible without our USB key plugged in.
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Countermail supports Linux, Mac OS X, and Windows. In case if we want to use our own email client it is possible with COuntermail since it also supports IMAP. Countermail is available free of charge on an open trail for a week, after which the prices start at $6.33/month.
6. MailfenceMailfence is an end-to-end encrypted, and free privacy-focused email service provider founded in Belgium since 2013. Belgium has strict laws that make things right for the customers than for the company.
Malifence supports OpenPGP and also two-factor authentication which prevents unauthorized access to any accounts. It not only focuses on email privacy, but it also provides the users with various services that include calendars, contacts, and document storage.
According to Belgium’s privacy laws if a judge issues a court order Malifence has to reveal any data, but no other outsider can even try to access the data.
A major drawback is that they don't have a mobile application. But it is said that they might release a request by the end of the year 2017.
7. YandexYandex is of Russian origin. It's obvious that Russia is more concerned about its privacy. It comes with Yandex search engine which is the tough competitor for Google in Russia. It will be no surprise if it gives google a run for the money since Yandex users have been increasing throughout the world. The users and its popularity increased since it got the Yandex.com domain.
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Their security precautions are superb, and they also offer a storage space of 10GB for every user.
8. HushmailHushmail is one of the oldest email service provider running since 1999.
The unique part of Hushmail which keeps them ahead of all the secure email service is that they own and operate all of their servers, which means no one of our data leaves Hushmail. And two of the very few drawbacks are that they do not scan the emails and one-click encryption.
Hushmail is loaded with lots of excellent features like strict HTTPS, temporary email address, and two-step verification. It also has automatic encryption. Out of 17 years of service only once in 2007, the provider has been forced by the Canadian government to look upon three accounts.
Hushmail provides safety like no other. Some of the recent secure service providers are vulnerable at times which causes the users to lose their data, but Hushmail has been there standing strong and stable for 17 years.
9. RiseUpIt is yet another secure email service & gives the user a high level of privacy. RiseUp provides the users with secure email solution, zero trackers and zero censorship at the cost of nothing. It is entirely a free secure email service provider.
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Since 1999 this email service is government free even after many run-ins no data was read by the government or anyone else.
After all the cool secure features this disappoints the users with slow activation of accounts. Usually, it takes a couple of days to get things set. And the new users must send in a support ticket requesting an account. Once we get the account everything is fine with their service.