Are your emails and attachments safe from prying eyes?
Unless you are using a secure email service that respects your privacy, the answer is probably no. Most large email providers, such as Gmail and Yahoo, do not respect the privacy of your inbox. For example,
- Google is adding ever more advertisements into your Gmail Promotions section. We’re also seeing reports that some people are finding ads interspersed between messages within their Gmail Inbox.
- Gmail was caught giving third parties full access to user emails and also tracking all of your purchases.
- Advertisers have been allowed to scan Yahoo and AOL accounts to “identify and segment potential customers by picking up on contextual buying signals, and past purchases.”
- Yahoo has been caught scanning emails in real time for US surveillance agencies.
While Gmail does allow users to opt out of some invasive features, the basic business model of these services revolves around data collection.
Big-name email services put lots of money into security, but they are also large targets and not invulnerable. A while back, the big news was the ease with which hackers were able to compromise thousands of Microsoft Exchange email servers. You might well be safer using a smaller, less well-known email service.
Another concern is where your email service is located and how this may affect your data and privacy. Some jurisdictions have laws to protect data privacy (Switzerland), while others have laws in place that erode it (the US and Australia). We’ll cover this in more detail below.
On a positive note, there is a relatively simple solution for keeping your inbox more secure: switch to a secure email provider that respects your privacy.
What is the best secure email service in 2023?
With so many different types of users, there is no single “best secure email” service that will be the top choice for everyone.
While some may prioritize maximum security and strong encryption, others may want convenience and simplicity with user-friendly apps for all devices.
Here are just a few factors to consider when switching to a secure email provider:
- Jurisdiction – Where is the service located and how does this affect user privacy? Where is your data physically stored?
- PGP support – Some secure email providers support PGP, while others do not use PGP due to its vulnerabilities and weaknesses.
- Import feature – Can you import your existing emails and contacts?
- Email apps – Due to encryption, many secure email services cannot be used with third-party email clients, but some also offer dedicated apps.
- Encryption – Are the emails end-to-end encrypted in transit? Are emails and attachments encrypted at rest?
- Features – Some features you may want to consider are contacts, calendars, file storage, inbox search, collaboration tools, and support for DAV services.
- Security – What are the provider’s security standards and policies?
- Privacy – How does the email service protect your privacy? What data is being collected, for how long, and why?
- Threat model – How much privacy and security do you need and which service best fits those needs?
The goal of this guide is to help you find the best secure email solution for your unique needs.
This list is not in rank order. (Choose the best secure email service for you based on your own unique needs!)
Here are the most secure email providers that protect your privacy.
1. Proton Mail – Secure email in Switzerland
|Free Tier||Up to 1 GB|
Proton Mail is a Switzerland-based email service that enjoys a great reputation in the privacy community. It was started by a team of academics working at MIT and CERN in 2014. Shortly thereafter, it was promoted in American media as “the only email system the NSA can’t access” – which was around the time Lavabit was shut down for not cooperating with the US government.
Looking at the service itself, Proton Mail has a lot going for it. It utilizes PGP encryption standards for email and stores all messages and attachments encrypted at rest on Swiss servers. Proton Mail has a unique feature for “self-destructing messages” and they have also added address verification and full PGP support.
Regarding encryption, however, it’s important to note that Proton Mail does not encrypt the subject lines of emails or certain metadata, inherent limitations of the PGP standard. Most of the email services we discuss here use PGP, but I wouldn’t count on any of them to keep me safe from the NSA or their counterparts in other major countries.
Additionally, the Proton Mail search function can only search subject lines within your inbox, but not the actual content of your emails. This is another functional limitation that comes from integrating more encryption and security into the service.
Proton Mail does offer some great apps for mobile devices (Android and iOS). You can also use Proton Mail with third-party apps through the Proton Mail Bridge feature (restricted to paid users).
Overall Proton Mail is a well-regarded email provider and should be a great secure email option for most users. Switzerland remains a strong privacy jurisdiction that is not a member of any surveillance alliances.
Note: Proton Mail is now integrated into the Proton suite of services. The full suite includes Proton Mail, Proton Calendar, Proton Drive, and Proton VPN. You can learn more about these products in our full Proton Mail review.
- End-to-end (E2E) and zero-access encryption for Email, Calendar, and Contact information
- Operates under Swiss jurisdiction
- All data stored on servers in Switzerland
- Apps for Android and iOS mobile devices
- Web client, encryption algorithms, Android and iOS code are all open source
- Support for custom domains
- Strips IP address from emails
- Can be used with third-party email clients through the Proton Mail Bridge feature
- Can import contacts and emails
- Subject lines not encrypted
- Sometimes requires personal information for verification of new accounts
See our Proton Mail review for more info.
2. Mailfence – Fully-featured secure email in Belgium
Mailfence is a fully-featured secure email provider offering calendar and contacts functionality, file storage, and PGP encryption support. It is based in Belgium, which is a good privacy jurisdiction with strict data protection laws.
For those wanting full PGP control and interoperability, without plugins or add-ons, Mailfence is a solid choice. Whether you are a personal user or you need a secure email solution for your business or team, Mailfence likely has all the features and options you’d want.
While many secure email services sacrifice features and functionality for security, you can have it all with Mailfence. This makes Mailfence a great alternative to full email and productivity suites, such as G Suite or Office 365.
In testing everything out for the Mailfence review, I found it to work very well with an intuitive design, a slick layout, and tons of features. Mailfence also offers email and phone support, in addition to cryptocurrency payment options.
Note: Due to financial requirements imposed by Google, Mailfence has dropped support for POP/IMAP connections to Gmail servers.
- Offers end-to-end encryption and digital signatures
- Mobile and web apps
- Data is stored on Belgian servers
- Offers OpenPGP encryption
- Messages, Documents, Calendar, Contacts, and Groups
- SMTP, POP, and IMAP support
- Can synchronize with other email clients
- Supports password-protected messages with expiration time
- Removes IP addresses from mail headers
- OpenPGP user keystore
- Great user interface (recently updated)
- Cryptocurrency payment options
- Logging of IP address and some other data
- Code is not open source
See our Mailfence review for more info.
3. Tutanota – Private and secure email in Germany
Tutanota is a Germany-based secure email service run by a small team of privacy enthusiasts, with no outside investors or owners. Although it is not as widely known as Proton Mail, Tutanota is a serious player among secure email providers. Its hybrid encryption system overcomes some of the drawbacks of PGP, and your privacy rights are protected by the GDPR and other pro-privacy EU regulations.
All messages in your inbox, contacts, and calendar are encrypted at rest on servers in Germany. For sending encrypted emails with Tutanota, you have two options:
- Emailing another Tutanota user, which encrypts everything automatically (asymmetric encryption)
- When sending an email to someone outside of Tutanota, the user receives a link to the message and a password key for encryption/decryption purposes (symmetric encryption). The outstanding feature here is that Tutanota establishes an external mailbox for that particular contact, where all the exchanged messages are securely encrypted. This proves to be quite useful, especially in a business context.
While Tutanota uses high encryption standards and is arguably one of the most secure email providers anywhere, it also comes with some tradeoffs. This includes no support for PGP, IMAP, POP, or SMTP. Additionally, you cannot import existing emails into your encrypted Tutanota inbox.
To make up for the lack of IMAP support, Tutanota has built its own open source desktop clients for Windows, Linux, and macOS, with offline mode included. This means that you can access your emails, calendars, and contacts even when not having access to the web.
If you are looking for a transparent, high-security email provider run by a team of privacy enthusiasts, Tutanota is a solid choice.
- Encrypted messages (including Subject lines) Address Book, Inbox Rules and Filters, Search Index, encrypted at rest and stored on German servers
- Can search body of encrypted messages
- Can send encrypted messages to non-users
- Strips IP address from emails
- Desktop, mobile, and web apps
- Open source code (including mobile apps)
- Great apps for mobile devices
- Free accounts with 1 GB of storage
- Encrypted calendar with iCard support
- Encrypted contacts
- Inbox rules with Spam filter
- Multiple email addresses (aliases)
- Support for custom domains and other price+ features
- Discounts and additional support for non-profits
- Publishes regular Transparency Reports
- Does not work with PGP
- Currently no way to import existing emails
- Will not work with 3rd-party email clients
See our Tutanota review for more info.
4. Mailbox.org – Private email in Germany
One German secure email service you should definitely consider is Mailbox.org. It provides robust security for your email, but it also functions as an all-inclusive productivity suite, similar to Microsoft 365 (formerly known as Office 365). It offers a huge lineup of features, including Mail, Calendar, Address Book, Drive (cloud storage), Tasks, Portal, Text, Spreadsheet, Presentation, and Webchat. Impressively, Mailbox.org still has a user-friendly interface and design despite all the features.
When choosing a secure email provider, you often have to choose between features and security. With Mailbox.org, you can arguably get the best of both worlds. From the security and encryption side, Mailbox.org offers full PGP support and options to easily encrypt all your data at rest on their secure servers in Germany. You can also use Mailbox.org with mobile apps and third-party email clients.
Lastly, Mailbox.org is very affordable, with basic plans starting at only €1 per month and going up for more storage and features. You can pick up a free 30-day trial if you want to test-drive this privacy-focused email provider.
Note: Mailbox.org does receive requests for information from “public authorities.” In 2022, they received 55 requests for information, and ultimately rejected about 13% of them. They responded to the rest of them as required by law.
- PGP support (server-side or E2E through Mailvelope app)
- Company and servers located in Germany with strong privacy protections
- HSTS and PFS for messages in transit
- Protected against man-in-the-middle attacks
- Message and spam filters
- Virus protection
- Full text search
- POP, IMAP, SMTP, ActiveSync support
- vCard, CardDAV, CalDav support
- Messages are encrypted at rest
- Supports custom domains
- Mobile apps for some of the Office features
- Open source
- No mobile email clients (but can be used with third-party email clients)
- Some tracking during registration
- PGP encryption leaves message subject and metadata exposed
Check out our Mailbox.org review for more details.
5. Posteo – Privacy-focused email in Germany
Posteo is yet another German email service. It provides strong privacy and security to its users, and in many ways is similar to Mailbox.org. Both are comprehensive email providers that employ PGP encryption. They even charge similar prices. However, Posteo distinguishes itself in a few significant aspects:
- It does not support custom domains.
- There is no designated spam folder (emails are either sent to the inbox or not accepted).
- There are no trial or free versions, which is somewhat offset by the reasonable prices they charge.
Posteo really makes an effort to protect the privacy of its users. IP addresses are automatically stripped from emails, no logs are kept, and they offer strong encryption standards. In short, this email takes security and privacy very seriously.
Posteo also supports completely anonymous registration and anonymous payments – even allowing you to send cash in the mail for no digital trail. (We see this trend with VPN services as well.) And if you pay with a credit card, PayPal, or some other digital method, they manually separate account details from payment info.
- Mail, Calendar, Contacts, and Notes are encrypted at rest with OpenPGP on secure servers in Germany
- Configurable spam filter
- Migration service for moving from another email service to Posteo
- Subject, headers, body, metadata, and attachments are encrypted
- Includes Messages, Calendar, Contacts (Address Book), and Notes
- Completely Open Source
- Strong commitment to privacy, sustainable energy, and other social initiatives
- Self-financed; good track record (operating since 2009)
- No logs, IP address stripping, secure email storage with daily backups
- Allows anonymous (cash) payments
- Supports SMTP, POP, and IMAP protocols
- Custom domains not supported; no “.com” options available
- No spam folder (spam emails are either rejected or delivered to regular inbox)
- No trial or free version
- Cryptocurrency payments not supported
See the Posteo review for more info.
6. Runbox – Private and sustainable email in Norway
Runbox is a Norwegian company that has been in the email business for over 20 years. Norway is a good secure-email jurisdiction, with a strong legal framework for privacy. All Runbox servers are located in secure Norwegian data centers, running on clean, renewable, hydropower energy.
One unique feature of Runbox is that it gives you 100 aliases to use with your account. Secure file storage is also included, with different pricing tiers. Runbox fully supports SMTP, POP, and IMAP protocols and can be used with third-party email clients. They released Runbox 7 over a year ago, and are improving it all the time, with a massive number of updates taking place so far this year. which is a webmail client, but they do not offer custom mobile or desktop clients.
Unlike some other secure email providers, Runbox does not have a built-in option for encrypting your entire mailbox. And while you can use PGP with Runbox, it is not yet built into the platform. Another drawback is that Runbox does not offer a built-in calendar, but this feature may be included in Version 7 (when released).
Runbox offers 30-day free trials and makes importing your existing emails simple with the guides on their site. They also go the extra mile by giving you a 60-day money-back guarantee so you can really get a sense of whether this service suits you before getting locked into a subscription.
- IP addresses stripped from messages
- Includes Webmail, Contacts, and Files
- Servers run on renewable energy
- Supports SMTP, POP, and IMAP protocols
- Synchronizes with other email clients
- GDPR compliant
- Norway has strong data protection laws
- 100 email aliases per mailbox
- Custom domain names on some paid accounts
- Numerous payment methods accepted (including cash and cryptocurrencies)
- Browser-based; no desktop or mobile apps
- Not open source
- Data not encrypted within the Runbox system or at rest
- No business-specific features
Check out our Runbox review here.
7. CounterMail – Private and secure Swedish email service
Next up on our list is CounterMail, a secure email provider based in Sweden. CounterMail has been operating for over 10 years with a philosophy to “offer the most secure online email service on the Internet, with excellent free support.”
Note: Before we go any further, you should know that registering for CounterMail currently requires an invitation from a premium CounterMail user. If you don’t know someone who already uses this service, you are not welcome right now.
CounterMail uses OpenPGP encryption with 4,096-bit encryption keys. They protect their users from identity leaks and Man-In-The-Middle attacks with RSA and AES-CBC encryption on top of SSL. Unfortunately, they do not have their own mobile or desktop apps.
In order to ensure your privacy, they keep no logs and they store your mail on diskless servers. Countermail anonymizes email headers and also strips the sender’s IP address. All emails and attachments are stored encrypted at rest using OpenPGP on servers in Sweden.
While CounterMail is a bit more expensive than some other secure email providers, they explain this price difference comes from using only high-quality servers and implementing strong security measures. It may not have all the frills, but CounterMail is a serious security-focused email provider with a 10+ year track record.
- Supports cryptocurrency payments
- Secure, built-in password manager
- All emails and attachments stored encrypted on no-logs, secure servers in Sweden
- Custom domain support
- Message filter and autoresponder features
- Uses RSA, AES-CBC, and SSL encryption to protect against leaks and MITM attacks
- Design and UI feels outdated
- More expensive than other secure email options
- Now requires an invite to register
8. Kolab Now – Fully-featured Swiss email
Based in Switzerland, Kolab Now is a private email service offering lots of features and full email suite functionality. A Kolab Now subscription includes email, contacts, calendars, scheduling, collaboration/sharing tools, and cloud file storage. Right now they are running a public beta of their voice and videoconferencing system. All of the features and options make Kolab Now an excellent choice for business users, teams, and privacy-focused individuals.
While Kolab now does offer numerous features and support for all major operating systems and devices, it also does not offer as much encryption for those who want the highest levels of security. End-to-end encryption for emails is available but not built-in and emails are not stored encrypted at rest.
The price is also on the higher end, especially if you want access to all features and more storage. However, for those wanting a feature-rich email suite hosted in Switzerland, Kolab Now may be a good fit.
- Accepts cryptocurrency payments
- Full support for POP, SMTP, and IMAP
- Switzerland jurisdiction with strong privacy protection
- Full email suite with numerous features to replace Gmail, Office365, etc.
- Support for custom domains, teams, and business users
- End-to-end (E2E) encryption is available, but not built in
- Email not encrypted at rest (but stored in high-security Swiss data center)
9. StartMail – Private email hosted in The Netherlands
StartMail is a secure email service brought to you by the team behind Startpage, a private search engine based in the Netherlands. While there was surprising news about System1 investing in Startpage, StartMail is its own unique entity under StartMail B.V. – a company operating under Dutch law in The Netherlands.
StartMail allows users to utilize PGP encryption with emails also being encrypted at rest on their Dutch servers. One cool feature of StartMail is they give you the ability to create temporary, disposable email addresses “on the fly” to use with different services. IMAP and SMTP are also supported if you want to use StartMail with third-party apps such as Thunderbird.
In May of 2023, SmartMail doubled the amount of storage for all their plans to 20GB without increasing the cost, thereby giving all their users a nice gift.
- Can create temporary, disposable email addresses
- Accepts cryptocurrency payment
- IMAP and SMTP support; can use custom domains
- Headers and IP address stripped from all emails
- Accounts come with 10 GB file storage
- No custom mobile apps
- Not open source
- Higher prices
10. Soverin – Basic private email in the Netherlands
Soverin is a basic secure email service at a reasonable price. Plans come with 25 GB of storage and custom domains are supported. All data is stored on servers in Germany. Soverin strips IP addresses from headers while also using strong encryption standards, although email is not stored encrypted at rest by default.
For those wanting a basic private email service with lots of storage that is protected by European privacy laws, Soverin may be a good choice. It can also be used with third-party email clients and importing old emails is relatively simple.
- 25 GB of data storage for all plans
- Data protected under Dutch privacy laws and GDPR
- Can be used with third-party email clients
- No custom mobile apps
- Not open source
- No built-in encryption options
Email jurisdiction and data privacy
Where your email service is located (jurisdiction) can seriously impact the security of your data. Depending on your threat model, this could be a major consideration. For an overview of jurisdiction and privacy, you may want to read our article on the Five/9/14 Eyes surveillance alliances.
Here are some reasons to pay attention to jurisdiction.
United States (leading member of the Five Eyes)
Tech companies in the US can be forced to give government agencies direct access to their servers for “extensive, in-depth surveillance on live communications and stored information” – as explained in the PRISM surveillance program. Data requests can also be accompanied by gag orders, which forbid the company from disclosing what’s going on (see also National Security Letters).
Several instances have been reported where American email service providers were compelled to surrender information. In a notable case, Lavabit chose to shut down the business instead of disclosing user data. Riseup, another email service provider in the US, was forced to hand over data to law enforcement agencies.
There are a few known cases of US email providers being forced to give up data. In one prominent example, Lavabit decided to shut down the business rather than give up user data. Another US email provider, Riseup, was also forced to give up data to authorities.
After exhausting our legal options, Riseup recently chose to comply with two sealed warrants from the FBI, rather than facing contempt of court (which would have resulted in jail time for Riseup birds and/or termination of the Riseup organization).
There was a “gag order” that prevented us from disclosing even the existence of these warrants until now. This was also the reason why we could not update our “Canary” [warrant canary that warns users about these events].
Europe in general is more privacy-focused than some locations
Once again politicians in Europe are trying to find an excuse to limit or ban the use of encryption by their people. This time around, the argument is that encryption must be banned to fight child abuse. Once again it is up to tech companies including Tutanota and Mailfence to protect the privacy rights of the populace. In April, a group of companies sent an open letter to the European Parliament arguing against the mass surveillance that the elimination of encryption would be meant to enable.
How this will turn out is unclear, but the possibility of the EU banning encryption casts doubts on the viability of any secure email service based in the EU.
We’ll let you know what happens with this.
All email providers must comply with the law
While these examples may seem alarming, the truth is that all email providers must comply with legal requirements in the country they are operating in. For example, Proton Mail, a Switzerland email provider, has also been forced to log IP addresses and disable accounts by valid court orders, as they disclose in their transparency report.
Considering everything, some jurisdictions are much better than others, so choose wisely. As a general rule, I’d still avoid email services in the US, and perhaps other Five Eyes jurisdictions.
Want secure email? Pay for it.
The unlimited “free” email business model is fundamentally flawed. It offers a free service, which is used to collect data and thereby monetize the user and make money on ads. With these privacy-abusing “free” services, you are actually paying for the product with your data.
In contrast, here we recommend privacy-friendly, secure, ad-free email services. While some of these private email services offer limited free subscriptions, you will need to upgrade to a paid plan for more storage and premium features (the freemium business model).
Fortunately, you can “vote with your dollars” by supporting these privacy-respecting businesses and upgrade to paid accounts. This will help secure email providers to grow, improve, and serve more people with an ethical business model that does not rely on exploiting their users’ data.
Secure email shortcomings and PGP flaws
While the news did attract lots of attention, the “flaws” were mainly limited to the incorrect implementation of PGP by third parties. To my knowledge, this did not affect the secure email providers mentioned in this guide.
Limited Use – Another fundamental problem with adopting secure email is that few people are willing to go through the hassle of PGP key management, encryption, decryption, etc. There are some solutions, to this, however, and by some measures encrypted email usage continues to grow.
Many providers address this issue by making encryption automatic and seamless. Tutanota, for example, uses built-in AES encryption that automatically encrypts emails between Tutanota users, including headers, subject line, body, and attachments. They also provide a secure, two-way communication contact form called Secure Connect.
Vulnerabilities – Even when using a secure browser, there are still vulnerabilities to consider with browser-based email clients. Phil Zimmermann gave an interview highlighting some of these shortcomings:
“The browser is not a terribly safe place to run code. Browsers have a large attack surface,” he said. Wherever encryption and decryption take place, though, it’s a vast improvement on no encryption. But even encrypting messages may not be enough, depending on the threat model. The very nature of email makes it vulnerable.
“Email has an enormous attack surface,” Zimmermann said. “You’ve not only got cryptographic issues but you’ve got things like spam and phishing and loading images from a server somewhere that might have things embedded inside.”
On a positive note, however, there are many options for securing and hardening your browser – see the secure browser and Firefox privacy guides. Furthermore, most secure email providers offer protection against these attack vectors by blocking email images by default while also utilizing virus filters.
Keep in mind, however, that non-browser email clients can also be problematic – potentially revealing unique information about your operating system (user agent) as well as your IP address and location.
Regardless of these limitations, using a secure email provider will help keep large tech companies from harvesting your email data for third parties.
Secure email vs secure messaging apps
Depending on your threat model, you may also want to consider using secure messaging apps, which do not have all of the vulnerabilities discussed above with email.
We have tested many different encrypted and secure messaging apps and compiled a list of our favorites. Here are a few reviews of some of the best options we’ve tested:
Encrypted messaging apps generally offer a higher level of security over email, plus they are much easier to use than PGP email encryption.
Finally, encrypted messaging apps are also convenient for back-and-forth conversations, document sharing, and collaboration with others. For more information, check out our roundup guide on the best secure messaging apps.
Always use a good VPN with email
One fundamental problem with email is that it can expose your IP address and location to third parties, by design.
While some secure email services strip IP addresses and conceal metadata, many others do not. And as we saw with the Proton Mail logging case, email services may be forced to log user IP addresses by valid court orders, without disclosing any information to the user. We’ve seen this with email providers in the US, Germany, and even Switzerland.
Finally, there’s also the fact that many email services keep logs for security, which may include user IP addresses, connection times, and other metadata. Of course, whenever you have logs, this data could end up with third parties (for various reasons).
To effectively conceal your IP address and location, you will need to use a good VPN (Virtual Private Network) service. Popular VPN services, such as ExpressVPN and NordVPN, offer VPN clients (apps) for all major operating systems and devices.
A VPN creates a secure tunnel between your device and a VPN server, encrypting your traffic and concealing your real IP address and location. The VPN will encrypt and anonymize your internet traffic, while you carry on with business as usual. Some of the larger providers, such as NordVPN and Surfshark, offer apps for all major operating systems and devices, along with large server networks around the world.
Because a VPN offers significant privacy and security benefits, it’s a smart idea to use one whenever you’re online. Internet providers in many countries are recording user browsing history by logging DNS requests. Depending on local laws, this information could then be sold to advertisers or handed to government agencies in countries with mandatory data retention laws. With a VPN, your DNS requests are encrypted and handled by the VPN server and unreadable to your ISP or other parties.
For more info, see these best VPN services.
Conclusion on secure and private email services in 2023
Regardless of your circumstances, opting for a secure and private email service is a wise move to protect your privacy. Major email providers like Gmail, Yahoo, and Microsoft don’t always prioritize your privacy, so you have to look after it yourself. Paying your money to one of our recommended email services means you won’t be paying your privacy to some “free” email service.
Once you switch to one of these email services your private communications will be much more secure. Then all you need to do is avoid non-technical attacks, like the typical email scams that never seem to go away.
See the main privacy tools guide for other privacy and security essentials.
We also have a guide on encrypting email.
And if you want more info on these secure email providers, you could check out the reviews below:
- Proton Mail Review
- Tutanota Review
- Mailfence Review
- Mailbox.org Review
- Hushmail Review
- Posteo Review
- Fastmail Review
- Runbox Review
Have you used one of these secure email providers? Feel free to leave your feedback/review of the service below.
This secure email guide was last updated on May 30, 2023.