ProtonMail Review 2025 | Best in Class Encrypted Email Explained

I’ve used Proton Mail for years as a secure and private alternative to options like Gmail. I’ve never been comfortable with Big Tech being able to scan my emails and show ads in my inbox, yet time and again I’m met with the same question from people who don’t understand the cost of these free services: why would you pay for email? In this Proton Mail review, we’re going to take a deep dive into the pros and cons of this privacy-first email solution and compare it’s encryption and suite of features to its competitors so you can make an informed decision for yourself.

As a privacy and security advocate, my desire isn’t to simply promote Proton Mail as some kind of “better version of Gmail”. In the end, my hope is that you’ll begin to understand the value of end-to-end encryption with your communications and how you can start using these kinds of services in your daily life.

Note: Some of the links in this article may be affiliate links, which means that at no extra cost to you, I may be compensated if you choose to use one of the services listed. I only recommend what I personally have used, and I appreciate your support!

Who is Proton? A Quick Intro

Proton Mail is a secure email service provider that has been making waves in the privacy community since it was first launch as a crowd funding project in 2014.

Founded by a team of scientists and engineers from CERN and MIT – led by CEO Andy Yen – Proton is headquartered in Geneva, Switzerland, a country renowned for its stringent privacy laws. Their entire value proposition hinges on offering end-to-end encryption and zero-access encryption, ensuring that your data is protected from prying eyes, including those of Proton itself.

Who Owns Proton?

The primary shareholder of Proton is the Proton Foundation, with the rest owned by the employees and C-suite executives. Initially, the company was set up as part of a crowdfunding campaign in 2014 that raised over $500,000 from 10,000 participants. The service has since grown to be used by millions of people worldwide.

The core philosophy behind Proton is to provide a private and secure email service that respects user privacy. With features like encrypted email, password-protected emails, and two-factor authentication, Proton Mail ensures that your communications remain confidential.

Whether you’re a privacy advocate or just someone who values their online security, Proton Mail offers a robust solution to keep your emails safe.

Proton Mail Overview & Ecosystem

Proton AG is the parent company based in Geneva, proudly operating under the strict data privacy regulations that Switzerland offers. The foundation of what they offer is end-to-end encryption across an array of services that we tend to use on a daily basis.

But what exactly does it mean to have end-to-end encryption? And how is that different from “zero knowledge encryption”?

• End-to-end encryption means that communication between Proton Mail users is encrypted in such a way that only the sender and recipient can access the email content. This ensures that your messages remain private, even from the email provider itself.
• Zero knowledge encryption, on the other hand, protects your data from unauthorized access, ensuring that only you can access your inbox. Even though your emails reside on Proton servers in Switzerland, they are unable to decrypt and read them (which can’t be said for Gmail, Yahoo & others).

Honestly, these two phrases get interchanged frequently, but the point here is that this combination of encryption technologies makes Proton Mail a highly secure choice for those who prioritize control and privacy in their online communications.

Beyond email, the Proton ecosystem includes:

• ProtonVPN: A virtual private network service that builds a private onramp to the internet.
• Proton Calendar: The most secure Google calendar alternative that keeps your meetings and whereabouts private.
• Proton Drive: Secure and encrypted cloud storage for your sensitive documents and files (which is listed on our recommended secure cloud providers)
• Proton Pass: An encrypted password manager that allows you to create not only strong passwords, but also unique usernames (via email aliases)
• Proton Mail Bridge: A feature that enables users to integrate ProtonMail’s end-to-end encryption capabilities into their preferred email clients, such as Outlook and Apple Mail. This premium feature is exclusive to paid subscribers and enhances email security without abandoning familiar email services.
• Bonus – SimpleLogin: A way to create email aliases. Proton bought SimpleLogin and has integrated its features into their other products.

All of these services are included to some degree in every Proton Mail plan, although with Proton Unlimited you have maximum access to the full suite.

So when you’re looking at Proton Mail as an option, keep in mind that you’re not just considering a secure email provider, you’re looking at a secure and private alternative to a number of digital services.

Proton Mail Security Features

Proton Mail’s security features are one of its main selling points, setting it apart from other email providers. For the sake of this Proton Mail review, we’re going to look at these key security features:

• End-to-End Encrypted Emails
• Account Security
• Data Protection & Account Recovery

End-to-End Encrypted Emails

As mentioned earlier, Proton Mail offers end-to-end encrypted emails for anybody you communicate with – even if they don’t have their own Proton Mail account. This ensures that only the sender and recipient can access the email content, keeping your messages safe from prying eyes.

When sending an email to a non-Proton Mail user, the email arrives in unencrypted form and is subsequently encrypted by Proton Mail before reaching its recipient, ensuring that only the intended recipient has access to the message’s contents.

The above is an example of a user’s ability to add password encryption to any email that you send. When a user opens this email, they would be instructed to follow a link and provide this password. Only then can they see the contents of the email, and it wouldn’t be stored in their Gmail archive.

While Proton Mail offers end-to-end encryption for email content and attachments, it’s important to note that it does not encrypt email subject lines due to adherence to the OpenPGP standard. This limitation poses potential privacy risks and affects users’ ability to search their mailboxes. In contrast, providers like Tuta (formerly Tutanota) fully encrypt subject lines, offering enhanced privacy and searchability.

Of course, you could also just take advantage of ProtonMail’s support for Pretty Good Privacy (PGP) encryption with external accounts. This allows you to send encrypted messages directly to users who are not on the Proton Mail platform, further expanding the reach of secure communication.

In late 2023, Proton announced a beta version of their new blockchain key transparency that checks the public key of your recipient on a blockchain ledger to make sure it’s being sent to the right person.

Finally, you also have the option to set your emails to self-destruct. By setting an expiration time for your messages, you can ensure that sensitive information does not remain accessible indefinitely.

Proton Account Security

In addition to these security measures for email communication, Proton Mail also allows for two-factor authentication (2FA) to protect your Proton account.

With 2FA enabled (either an authenticator app or a security key), any new device or login session would need to be authenticated with a code or key. This adds an extra hurdle for would-be attackers trying to access your account.

Similarly, you can also enable “Two-password mode”, which requires two different passwords for your account login and to decrypt the inbox. Generally speaking, if you have 2FA enabled, I think that two-password mode is unnecessary.

Data Protection and Account Recovery

The data centers are physically located in Switzerland, a country known for its strong privacy laws. This means that your data is protected under Swiss law, which is generally considered a strong benefit by privacy advocates.

Also, because all of your data stored on these servers are encrypted so that even Proton can’t access it, this means that setting account recovery and data recovery methods is imperative.

If you don’t set this up and somehow lose access to your Proton account, Proton does not have “master keys” to help you unlock your account.

Proton Mail Servers and Data Security

Proton Mail’s commitment to data security is evident in the way it handles its servers and user data. All Proton Mail servers are physically located in Switzerland, a country known for its strong privacy protection laws.

All Proton Mail servers are physically located in Switzerland and owned by Proton.

This geographical advantage means that Proton Mail is subject to Swiss law, which offers a high level of protection for user data, far surpassing the privacy standards of many other countries.

The servers themselves are housed in secure facilities with multiple layers of physical and digital security measures. This includes biometric access controls, 24/7 surveillance, and redundant power supplies to ensure that your data is always protected.

Additionally, Proton Mail employs zero-knowledge encryption for emails from non-Proton Mail users, meaning that even Proton Mail staff cannot access the content of these emails. This ensures that your communications remain private, regardless of who you are emailing.

Proton Mail Mobile Apps

Good security and privacy almost always seem to come at the expense of convenience, and while those tradeoffs do exist in some ways (explained later), the good news is that ProtonMail’s mobile apps are beautiful, familiar and easy to use.

And, thankfully, available for both iOS and Android devices.

These apps provide a seamless experience across platforms, ensuring that you can access your Proton Mail account and enjoy consistent security features from your smartphone or tablet. Access to the apps can be protected by either a PIN code or biometrics, either of which can be set up in the app settings.

All data on the apps are still end-to-end encrypted and when composing a new message, you still have the ability to set a password, mail expiration date or attach an encrypted file.

Other Important Features

Although security and platform availability are two of the biggest draws, there are other features that have proven very useful as I’ve used used Proton Mail over the years.

For those who have doubts about switching from their legacy email provider – even if they’re drawn to the secure email features – these other features are important.

Import via Easy Switch

The difficulty that most people have with switching to a new email provider is one thing: their email archive.

The thought of losing access to years of emails that you may need to search and find later is daunting. That’s why Proton Mail’s Easy Switch tool exists.

Not only does this tool make it possible to import your archive of emails from other major providers (including calendars and contacts), it can also help you set up auto-forwarding so any messages that still come through your old email address are sent to your new Proton inbox.

User Interface and Customization

If you’re used to Gmail, Yahoo or Outlook, then navigating Proton Mail is a breeze thanks to it’s very similar user interface. You can customize the layout of your Proton Mail inbox by adjusting themes and layout while also organizing your messages via folders and labels.

But the ability to customize your inbox goes beyond simply aesthetics. In the settings you have the option to control:

• Conversation View: Do you want each email to be an individual entry in your inbox or do you prefer the modern “conversation view” where all emails from a thread are grouped together?
• Email Domain: Proton Mail allows you to connect your custom domain so that messages are sent and received via your custom email address and not one provided by Proton.
• Remote Image Load: Similar to other email providers, Proton Mail allows you to auto-load images. The difference is that it’s protected via proxy so that markers won’t get access to your IP address data when it loads.

Proton Sentinel (advanced security protection)

In 2023, Proton rolled out a new security feature they’ve called Proton Sentinel. This new feature, which can be turned off or on in your Proton Mail settings, includes:

• Advanced Login Protection: If Proton notices any odd or suspicious logins (i.e. coming from a new IP address or suddenly from another country), they’ll force strict challenges to verify your identity and prevent unauthorized account takeover.
• Detailed Security Logs: Within your settings, you can see exactly which devices logged in, sent mail or made changes to your account.
• Human Reviews: Suspicious login attempts that are flagged by automated systems are automatically reviewed by human security analysts.

Setting Up a Proton Mail Account

Creating a Proton Mail account is thankfully very easy. Unlike other email services that require personal information, Proton Mail allows you to set up an account without divulging any personal details.

To start the Proton Mail account creation process, visit the Proton Mail website and click on the “Sign Up” button. You can choose between free and paid accounts. Select your preferred plan, then choose a unique username and create a strong password to secure your account. During the account creation process, you have the option to provide a recovery email address (not mandatory). Proton Mail emphasizes privacy, so no personal contact details are required. However, keep in mind that using a VPN or the Tor network to create an account may trigger phone (SMS) verification.

By addressing privacy concerns and comparing it to other secure email services, Proton Mail stands out for not asking for personal contact details during signup. This makes it an excellent choice for users prioritizing privacy.

Free vs Plus and Unlimited Plans

Creating an account does not require giving over payment information, but if you want to take full advantage of the security products that Proton provides, it’s worth considering an upgrade to either the Plus plan or the Proton Unlimited plan

The free plan includes 1 GB of storage, 150 messages daily, and 3 folders/labels. While this plan may be sufficient for some users, others may require more storage or additional features.

For users seeking more robust functionality, Proton Mail offers the Mail Plus and Unlimited plans.

Ultimately, the choice between Proton Mail’s free and paid versions will depend on your individual needs and priorities. If security is your primary concern, the free version may be sufficient – at least to start. However, for users seeking additional features and storage, a paid plan may be well worth the investment.

Both the Plus and the Unlimited plan give you access to the additional services within the Proton ecosystem.

Proton Mail Pricing and Plans

Proton Mail offers a variety of pricing plans designed to meet different needs and budgets, making it accessible for both individual users and organizations. The free plan, known as Proton Free, provides 500 MB of storage, one email address, and essential features, making it a great starting point for those new to secure email services.

For users who require more storage and advanced features, Proton Mail offers two paid plans:

• Mail Plus: Includes 5 GB of storage, multiple email addresses, and additional features like custom domains and priority customer support.
• Proton Unlimited: Offers 15 GB of storage, access to the full suite of Proton services (including ProtonVPN, Proton Calendar, and Proton Drive), and the highest level of customer support.

Proton Mail also caters to families and businesses with specialized plans that offer shared storage and administrative tools. These plans are designed to provide a secure and private email service for multiple users, making it easier to manage communications within a family or organization.

With flexible pricing and discounts available for yearly payments, Proton Mail ensures that top-notch security and privacy are within reach for everyone.

Proton Ecosystem: Calendar and Drive

By nature, your email communication is closely linked to both your calendar and cloud storage (for attachments).

This is where Proton Calendar and Proton Drive come in.

These complimentary products provide users with even more tools to maintain their privacy and security online. Proton Calendar offers end-to-end encryption for calendar events, ensuring that details such as event titles, descriptions, locations, and invited guests are kept private. All Proton Mail users have access to ProtonCalendar, making it a valuable addition to the Proton ecosystem.

Proton Drive, on the other hand, is a secure and encrypted file storage solution. Users can upload files and create shareable links, while also having the option to secure the link with a password and set an expiration date.

It’s important to note that Proton Drive is only available to paid users.

By offering ProtonCalendar and ProtonDrive alongside its secure email service, Proton Mail provides users with a comprehensive suite of tools to protect their privacy online. This robust ecosystem makes Proton Mail an attractive option for those seeking an all-in-one solution for secure communication and data management.

Proton Mail for Business

For those business owners or IT professionals, the option to use Proton as an alternative to Google Workspace or Microsoft 360 is attractive.

With end-to-end encryption, migration tools, and user hierarchy, Proton Mail can be a valuable asset for companies seeking a secure email solution.

One potential limitation of Proton Mail for businesses is its lack of advanced search and a calendar that isn’t integrated with a meeting solution like Google Meet or Zoom. While Proton Mail’s security features are top-notch, businesses with more complex organizational needs may find these limitations to be a drawback.

Despite these potential limitations, Proton Mail remains a strong option for businesses seeking a secure email provider.

Comparing Proton Mail to Alternatives

While Proton Mail has carved a niche for itself as a secure email provider, I’d be doing you a disservice if I didn’t mention other alternatives on the market that may be worth considering. There are other top secure email providers including:

• Tuta (formerly Tutanota): offers unparalleled security, with full encryption of subject lines and robust data protection;
• Fastmail: provides a user-friendly interface and advanced integration with those who have 1Password as their password manager;
• StartMail: combines encrypted email with unlimited email aliases;

When evaluating secure email services, it’s important to consider Proton Mail alternatives. While Proton Mail is known for its strong encryption and privacy features, it does have some limitations, such as handling of personal information and IP address logging. Alternatives like Tuta, Fastmail, and StartMail may offer better anonymity or fewer compromises in certain areas.

Tuta may be an attractive alternative to Proton Mail if security is your top priority. However, Proton Mail provides more customization options and better customer service.

Fastmail, on the other hand, does not provide end-to-end encryption, meaning its security features are not as comprehensive as those offered by Proton Mail. However, Fastmail may be a suitable choice for users who value customization and ease of use over top-tier security.

StartMail, built by the same company that offers the private search engine Startpage, is known for offering unlimited email aliases for users, something that Proton limits inside the inbox.

In conclusion, while there are alternative email providers to Proton Mail, each comes with its own set of strengths and weaknesses. When choosing an email provider, it’s crucial to weigh the importance of security, customization, and aliases to find the best fit for your needs.

Customer Support and Resources

Proton Mail’s customer support options vary depending on your subscription plan. Free users have access to a searchable knowledge base, while paid users receive email and priority support. This tiered approach ensures that paying customers receive timely assistance with their inquiries.

In most cases – and in my own personal experience – Proton Mail’s customer service is able to resolve issues within a reasonable timeframe. Phone support is not available for more complex issues, but when filing a bug report, a response is typically received within 24 hours. Depending on the complexity of the issue, it may take several days to resolve.

Overall, Proton Mail’s customer support and resources are adequate for most users. While there may be room for improvement, the company’s commitment to security and privacy outweighs any minor shortcomings in customer service.

ProtonMail Review Summary

Throughout this Proton Mail review 2025, we’ve explored the various features, security measures, and customization options that Proton Mail offers. From its end-to-end encryption and zero-access encryption, to the broader Proton ecosystem, it’s clear that Proton Mail is a top choice for those seeking a secure email provider.

While Proton Mail may not be the perfect fit for everyone, its strong security features and user-friendly interface make it an appealing option for individuals and businesses alike. Additionally, its mobile apps for iOS and Android ensure that users can maintain their privacy and security on the go.

Of course, it’s essential to consider alternative email providers such as Tutanota, Fastmail, and StartMail when making a decision. Each provider has its own set of strengths and weaknesses, and the best choice will depend on your individual needs and priorities.

Frequently Asked Questions