Proton Mail: Encrypted Email

In-app purchases
94.6K reviews
Content rating
PEGI 3
10M+
Downloads
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About this app

Proton Mail's all-new encrypted email app protects your communications and has everything you need to easily manage your inbox.

The Wall Street Journal says:
“Proton Mail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.”

With the all-new Proton Mail app, you can:
• Create a @proton.me or @protonmail.com email address
• Send and receive encrypted emails and attachments with ease
• Switch between multiple Proton Mail accounts
• Send and receive Gmail emails directly inside Proton Mail
• Keep your inbox tidy and clean with folders, labels and simple swipe-gestures
• Receive new email notifications
• Send Password-protected Emails to anyone
• Keep important emails in focus with automatic, private categories
• Enjoy your inbox in dark mode

Why use Proton Mail?
• Proton Mail is free — We believe everyone deserves privacy. Upgrade to a paid plan to get more done and support our mission.
• Easy to use — Our all-new app has been redesigned to make it easier to read, organize, and write your emails.
• Your inbox is yours — We don’t spy on your communications to show you targeted ads. Your inbox, your rules.
• Rigorous encryption — Your inbox is secured across all your devices. No one can read your emails but you. Proton protects your data with zero-access encryption and end-to-end encryption between Proton users or with password protection.
• Unmatched protection — We offer strong phishing, spam, and spying/tracking protection.

Industry Leading Security Features
Messages are stored on Proton Mail servers using end-to-end encryption at all times and are transmitted securely between Proton servers and user devices. This largely eliminates the risk of message interception.

Zero Access to Your Email Content
Proton Mail's zero access architecture means that your data is encrypted in a way that makes it inaccessible to us. Data is encrypted on the client side using an encryption key that Proton does not have access to. This means we don't have the technical ability to decrypt your messages.

Open-Source Cryptography
Proton Mail's open-source software has been thoroughly vetted by security experts from around the world to ensure the highest levels of protection. Proton Mail only uses secure implementations of AES, RSA, along with OpenPGP, while all of the cryptographic libraries used are open source. By using open-source libraries, Proton Mail can guarantee that the encryption algorithms used do not have clandestinely built-in back doors.

Proton Easy Switch
Migrate from Gmail, Outlook, Yahoo, iCloud Mail or AOL to Proton Mail in just a few taps. Your messages, calendars and contacts are transferred automatically, so you’re up‑and‑running in moments—without any manual exporting or importing.

Gmail Auto‑forwarding
Enable auto‑forwarding from any number of Gmail accounts and funnel all the emails that matter into your Proton Mail inbox. Preserve Gmail’s convenience while adding an extra layer of privacy protection.

Proton Mail in the press:

“Proton Mail is an email system which uses end-to-end encryption, making it impossible for outside parties to monitor.” Forbes

“A new email service being developed by a group from MIT that met at CERN promises to bring secure, encrypted email to the masses and keep sensitive information away from prying eyes.” Huffington Post

Follow Proton on social media for all the latest news and offers:
Facebook: /proton
Twitter: @protonprivacy
Reddit: /protonmail
Instagram: /protonprivacy

For more information, visit: https://proton.me/mail
Our open-source code base: https://github.com/ProtonMail
A trusted email app that uses end-to-end encryption and offers advanced security
Updated on
Oct 1, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Contacts and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

90.8K reviews
Luke Brenton
June 19, 2026
Overall a solid mail app. However, viewing emails can be painful. Scrolling is far from smooth for emails with many images and some emails that consist of just text seem to break - tiny text that you can't zoom in on without it breaking entirely in the process. Would also be nice to be able to edit filters on the mobile app!
10 people found this review helpful
Did you find this helpful?
Proton AG
June 22, 2026
We've added your +1 to the existing request for supporting editing custom filters on the app. As for the issues you've observed, please report them through the in-app 'Report a problem' option, so we can document your report accordingly.
A Google user
October 14, 2018
The current version of the app needs quite a lot of work to improve it. The inbox isn't very responsive, labelling and archiving emails doesn't always work, deleting multiple emails is a bit of a pain and the app menu animation isn't smooth - you then have to wait a couple of seconds before being able to select any of the options from the menu. All in all its sluggish and needs a lot more development.
13 people found this review helpful
Did you find this helpful?
Proton AG
October 16, 2018
Thank you for the feedback you have provided. We are looking closely at every report from our users so we could know what to focus on for our next update. You can also contact us via our support form for any additional feedback considering the app. https://protonmail.com/support-form
Gin
March 2, 2023
Couldn't find a way to reply to your reply so I'm having to erase my original review in order to respond to you. I done what you've said but this has not helped. And the notification that I receive it's just a general 'Fail to send'. Most times, the messages fail to get sent from the Drafts folder. Not sure if this is of any help. The message in process of being sent stays in the Drafts folder forever (and you're unable both to cancel the sending or review the email), only not to be sent.
15 people found this review helpful
Did you find this helpful?
Proton AG
March 9, 2023
This behavior was reported to our developers, and they are looking into the potential causes and solutions for it. In the meantime, when you compose a message try waiting a bit before hitting the send button to give time and make sure for the final changes of the draft to get saved before sending.

What’s new

Multiple fixes and performance improvements.