Proton Mail AlternativesOnly Free apps categorised as Email Clients

The best free Email Client alternative to Proton Mail is Tuta Mail, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Proton Mail and 19 are free Email Clients so hopefully you can find a suitable replacement. Other interesting free Email Client alternatives to Proton Mail are Mailfence, Apple Mail, Infomaniak kMail and Vivaldi Mail.

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Proton Mail alternatives are mainly Email Clients, but if you're looking for WebMail Providers or Calendar Apps you can filter on that. Other popular filters include Free, Open Source and Self-Hosted. These are just examples - use the filter bar below to find more specific alternatives to Proton Mail.
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Alternatives list

  1. Tuta Mail icon

    Tuta Mail

     528 likes

    Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.

    103 Tuta Mail alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Flathub
    • F-Droid
    Tuta Mail screenshot 1
     
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    10
    Comments about Tuta Mail as an Alternative to Proton Mail
    Top Positive Comment
    Advik
    3

    Tutanota is end-to-end encrypted, as well offers 1 GB mail storage on free plan. The pro plans are cheap compared to protonmail, so it's better for low budget users

    Conner Vieira
    Positive
    -2

    Tutanota has historically been a lot more transparent, and arguably has been more honest about issues and plans

    Ada Byron
    Positive
    1

    I use both, ProtonMail is more secure but also more expensive and not as user-friendly. You cannot beat the price of Tutanota for service they provide.

    3 of 10 comments
    Tuta Mail icon
    Tuta Mail icon
    • Tuta Mail is Freemium and Open SourceProton Mail is also Freemium and Open Source
    • Tuta Mail is LightweightProton Mail is not according to our users
  2. Mailfence icon

    Mailfence

     64 likes

    This secure email platform offers end-to-end encryption, a comprehensive suite with Calendar and Documents. Mailfence is inter-operable with OpenPGP services, features digital signatures, provides keystores, and available as a PWA for mobile independence while ensuring no ads, trackers, or surveillance.

    71 Mailfence alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Mailfence screenshot 1
     
    |
    7
    Comments about Mailfence as an Alternative to Proton Mail
    Top Positive Comment
    PhmNguynHngThnh
    5

    Mailfence offers more functionality than Proton mail with Calendar, Document, Chat, and Group functionality. Moreover, the price is much lower than other competitors.

    Top Negative Comment
    Guest
    2

    Costs money to use with 3rd party programs.

    Review by a new / low-activity user.
    Guest
    Positive
    1

    because its free and don't need any pay and don't want phone number to sign in

    Review by a new / low-activity user.
    3 of 7 comments
    Mailfence icon
    Mailfence icon
    • Mailfence is Freemium and ProprietaryProton Mail is Freemium and Open Source
  4. Apple Mail icon

    Apple Mail

     245 likes

    Access, view and manage messages from all your email accounts in one place. Categorize your messages into easy to browse categories. Catch up on email easily with Apple Intelligence powered Priority Messages and summarizations.

    105 Apple Mail alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Mac
    • Online
    • iPhone
    • iPad
    • Apple Watch
    Apple Mail screenshot 1
     
  5. Ad
  6. Infomaniak kMail icon

    Infomaniak kMail

     42 likes

    Privacy-focused Swiss email system provides 20 GB free storage, supports custom domains and unlimited storage, syncs contacts and calendars, is ad-free, and is part of a secure productivity suite used by over a million users across Europe on all devices.

    42 Infomaniak kMail alternatives

    Cost / License

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Infomaniak kMail screenshot 1
     
  7. Vivaldi Mail icon

    Vivaldi Mail

     34 likes

    Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...

    101 Vivaldi Mail alternatives

    Cost / License

    • Free
    • Proprietary

    Application types

    Platforms

    • Online
    • Vivaldi
    Mail
     
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    1
    Comments about Vivaldi Mail as an Alternative to Proton Mail
    John Fastman
    Positive
    0

    Vivaldi mail offers PGP-based email encryption, similar to Protonmail. But the web client is much less well developed. However, unlike Protonmail (at the time of writing), they allow you to import your own PGP keys, which is nice (a feature Protonmail users have been demanding for years).

    Vivaldi Mail icon
    Vivaldi Mail icon
    • Vivaldi Mail is Free and ProprietaryProton Mail is Freemium and Open Source
  11. Onion Mail icon

    Onion Mail

     4 likes

    The power of simplicity. Onion Mail can manage emails in the normal network and in the Tor. Onion Mail protect your privacy and anonymity.

    31 Onion Mail alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Online
    • Android
     
  12. Criptext icon

    Criptext

     11 likes

    Finally, an email service that's built around your privacy. Get your @criptext.com email address and see what it's like to have peace of mind and privacy in every email you send.

    29 Criptext alternatives

    Cost / License

    • Free Personal
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    Criptext screenshot 1
     
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    1
    Comments about Criptext as an Alternative to Proton Mail
    Guest
    Positive
    3

    Even thought Proton Mail is a good privacy focused email, it still holds both your emails and your keys on their servers. Regarding ownership, Criptext gives the user ownership over their keys, which reside only on the user's devices. It also uses Signal Protocol for encryption which I personally like better than just using pgp.

    Review by a new / low-activity user.
    Criptext icon
    Criptext icon
    • Criptext is Free Personal and Open SourceProton Mail is Freemium and Open Source
  13. Zoho Mail icon

    Zoho Mail

     123 likes

    Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

    108 Zoho Mail alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Apple Watch
    • HUAWEI AppGallery
    • Samsung Galaxy Store
    All-in-one view
     
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    3
    Comments about Zoho Mail as an Alternative to Proton Mail
    John Fastman
    Negative
    21

    The whole point of switching to an encrypted email provider (Protonmail, Tutanota, etc.) is to avoid the prying eyes of the company's techies, government surveillance and hackers to breach the servers. Zoho Mail doesn't encrypt your email, so it doesn't offer that security or privacy.

    Guest
    Negative
    8

    Its not an encrypted free email provider like ProtonMail.

    Review by a new / low-activity user.
    Guest
    Negative
    9

    This garbage is almost as bad as Gmail.

    Review by a new / low-activity user.
    Zoho Mail icon
    Zoho Mail icon
    • Zoho Mail is Freemium and ProprietaryProton Mail is Freemium and Open Source
  14. MeSign icon

    MeSign

     4 likes

    MeSign is a free email encrypted client. Once you log in to your email account with MeSign App, the free S/MIME certificates will be issued, installed and configured automatically. The users can start to encrypt within 3 minutes.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Windows
    • Android
    • iPhone
    MeSign screenshot 1
     
  15. Beeble icon

    Beeble

     2 likes

    The Beeble Project is email and online cloud storage platform with unprecedented security and privacy without third party access.

    64 Beeble alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    Start
     
12 of 19 Proton Mail alternatives