Zoho Mail AlternativesOnly Open Source apps categorised as Email Clients

The best open source Email Client alternative to Zoho Mail is Proton Mail. If that doesn't suit you, our users have ranked more than 100 alternatives to Zoho Mail and 13 are open source Email Clients so hopefully you can find a suitable replacement. Other interesting open source Email Client alternatives to Zoho Mail are Tuta Mail, FairEmail, Posteo and Infomaniak kMail.

More about Zoho Mail
Copy a direct link to this comment to your clipboard
Zoho Mail alternatives page was last updated

Alternatives list

  1. Proton Mail icon

    Proton Mail

     1017 likes
    Copy a direct link to this comment to your clipboard

    Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any device.

    98 Proton Mail alternatives

    Cost / License

    • Freemium (Subscription)
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Tor
    • Flathub
    • Snapcraft
    Proton Mail screenshot 1
     
    |
    2
    12
    Comments about Proton Mail as an Alternative to Zoho Mail
    Guest
    Negative
    11

    Free plan does not allow your own domain

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

    Encryption and secure service.

    Zoho Mail Icon
    Proton Mail icon

    • Most users think Proton Mail is a great Zoho Mail alternative.

    • Proton Mail is the most popular Web-based, Windows, Android & Mac alternative to Zoho Mail.

    • Proton Mail is the most popular Open Source & free alternative to Zoho Mail.

    • Proton Mail is Freemium and Open SourceZoho Mail is Freemium and Proprietary
  2. Tuta Mail icon

    Tuta Mail

     516 likes
    Copy a direct link to this comment to your clipboard

    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

    • Freemium (Subscription)
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Flathub
    • F-Droid
    Tuta Mail screenshot 1
     
    |
    2
    6
    Comments about Tuta Mail as an Alternative to Zoho Mail
    Guest
    Negative
    3

    Free plan does not allow your own domain

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

    Its open source, so its bugs will always be minimal.

    Review by a new / low-activity user.
    Zoho Mail Icon
    Tuta Mail icon

    • Most users think Tuta Mail is a great Zoho Mail alternative.

    • Tuta Mail is Freemium and Open SourceZoho Mail is Freemium and Proprietary
    • Tuta Mail is LightweightZoho Mail is not according to our users
  4. FairEmail icon

    FairEmail

     87 likes
    Copy a direct link to this comment to your clipboard

    Open-source, privacy-focused email client offering features such as encryption via OpenPGP and S/MIME, unlimited accounts, a unified inbox, customizable settings, and reformatted emails to prevent phishing. Supports two-way synchronization and provides Pro features for additional customization.

    43 FairEmail alternatives

    Cost / License

    • Freemium (Pay once)
    • Open Source

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Compose message view.
    Setup screen.
    Messages view with dark theme.
     
  5. Ad
    Screenshot
    Infomaniak kMail icon
    Infomaniak kMail

    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 acro...

    https://www.infomaniak.com
    Learn More
  6. Posteo icon

    Posteo

     83 likes
    Copy a direct link to this comment to your clipboard

    Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.

    74 Posteo alternatives

    Cost / License

    • Subscription
    • Open Source

    Application types

    Platforms

    • Online
    Drag and drop
     
  7. Infomaniak kMail icon

    Infomaniak kMail

     38 likes
    Copy a direct link to this comment to your clipboard

    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

    • Freemium (Subscription)
    • Open Source

    Application types

    Platforms

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

    Librem Mail

     3 likes
    Copy a direct link to this comment to your clipboard

    End-to-end encrypted email used by nearly everybody already.

    Cost / License

    • Subscription
    • Open Source

    Application type

    Platforms

    • Android
    • Android Tablet
    Librem Mail screenshot 1
    Librem Mail screenshot 2
    Librem Mail screenshot 3
     
  10. Swisscows.email icon

    Swisscows.email

     5 likes
    Copy a direct link to this comment to your clipboard

    Swisscows.email is another product of Swisscows AG. This product offers you secure email traffic. With Swisscows.email you can send your emails encrypted so that absolutely no one can read them. The service is comparable to a letter that is protected from prying eyes in an...

    Cost / License

    • Subscription
    • Open Source

    Application types

    Platforms

    • Online
    • iPhone
    • iPad
    • Android
    • Android Tablet
    Swisscows.email screenshot 1
     
  11. Ltt.rs icon

    Ltt.rs

     3 likes
    Copy a direct link to this comment to your clipboard

    No-frills, easy to use, easy to maintain Email client for Android based on the JSON Meta Application Protocol (JMAP).

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Android
    • F-Droid
    Ltt.rs screenshot 1
    Ltt.rs screenshot 2
    Ltt.rs screenshot 3
     
  12. sup icon

    sup

     13 likes
    Copy a direct link to this comment to your clipboard

    Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact- list management, custom code insertion via a hook system, and more.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    search & results
     
  13. Onion Mail icon

    Onion Mail

     4 likes
    Copy a direct link to this comment to your clipboard

    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
     
  14. Criptext icon

    Criptext

     11 likes
    Copy a direct link to this comment to your clipboard

    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.

    Cost / License

    • Free Personal
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    Criptext screenshot 1
    Criptext screenshot 2
    Criptext screenshot 3
     
  15. Fripost icon

    Fripost

     5 likes
    Copy a direct link to this comment to your clipboard

    Fripost – the Free Email Association. Fripost organize the people who want an alternative to "free" e-mail services where you are constantly under surveillance and personal data is handed over to third parties.

    Cost / License

    • Paid
    • Open Source

    Application types

    Platforms

    • Online
     
12 of 13 Zoho Mail alternatives