Mailfence AlternativesOnly apps categorised as Calendar Apps

The best Calendar alternative to Mailfence is Proton Mail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Mailfence and 12 are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to Mailfence are Tuta Mail, Posteo, Mailbox.org and Fastmail.

Mailfence iconMailfence
  59
  • ...

Secure, private email with end-to-end encryption, no ads, tracking, or government surveillance, ensuring top-notch privacy...

More about Mailfence
More about Mailfence
Mailfence alternatives page was last updated Apr 19, 2025
Copy a direct link to this comment to your clipboard
  1. Proton Mail icon

    Proton Mail

     933 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.

    99 Proton Mail alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • CH flagSwitzerland

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Tor
    Proton Mail screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  End-to-End Encryption
    2.  Encrypted Email
    3.  Ad-free
    4.  Two-factor Authentication
    5.  Mobile friendly
    6.  No Tracking
    7.  Custom Domain
    8.  Dark Mode
    9.  PGP Encryption
    10.  Anonymous Email
    11.  Filters
    12.  Self Destructing Messages

    Proton Mail VS Mailfence

     
    Comments about Proton Mail as an Alternative to Mailfence
    Guest
    Negative •Apr 18, 2017
    -3

    Protonmail is a closed platform, and have no similarity between Mailfence (except in a sense that they both use OpenPGP as their end-to-end encryption technology).

    Guest
    Positive •Jun 13, 2016
    -5

    It's entirely outside of US jurisdictions - just like Mailfence. It uses end-to-end encryptions - just like Mailfence, and in fact, even ProtonMail cannot access your information, so it is BETTER than Mailfence, in my opinion, in terms of security.

    Mailfence Icon
    Proton Mail icon

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

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

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

    • Proton Mail is Freemium and Open SourceMailfence is Freemium and Proprietary
    • Proton Mail is Privacy focusedMailfence is not according to our users
  2. Tuta Mail icon

    Tuta Mail

     482 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.

    100 Tuta Mail alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Flathub
    • F-Droid
    Mail View

    Properties

    1.  Privacy focused
    2.  Lightweight
    3.  Clean design

    Features

    1.  Encrypted Email
    2.  End-to-End Encryption
    3.  Dark Mode
    4.  Custom Domain
    5.  Encrypted calendar
    6.  Contacts
    7.  No Tracking
    8.  Multiple Account support
    9.  Integrated File Sharing
    10.  Ad-free
    11.  Spam Filter
    12.  Email Organizer

    Tuta Mail VS Mailfence

     
  4. Posteo icon

    Posteo

     79 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.

    73 Posteo alternatives

    License model

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Online
    Drag and drop

    Properties

    1.  Privacy focused
    2.  Security-focused

    Features

    1.  Encrypted mail and contacts
    2.  Encrypted Email
    3.  Calendar Integration
    4.  PGP Encryption
    5.  Two-factor Authentication
    6.  Mail Filtering
    7.  Support for Aliases
    8.  No Tracking
    9.  Ad-free
    10.  Calendar View
    11.  Spam Filter
    12.  End-to-End Encryption

    Posteo VS Mailfence

     

    • Posteo is the most popular commercial alternative to Mailfence.

    • Posteo is Paid and ProprietaryMailfence is Freemium and Proprietary
    • Posteo is Privacy focusedMailfence is not according to our users
  5. Ad
    Screenshot
    Fastmail icon
    Fastmail

    Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email...

    https://www.fastmail.com
    Learn More
  6. Mailbox.org icon

    Mailbox.org

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

    E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).

    82 Mailbox.org alternatives

    License model

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Online
    Dashboard online office. Powered by Open-Xchange

    Properties

    1.  Privacy focused

    Features

    1.  Custom Domain
    2.  Encrypted Email
    3.  Built-in Calendar
    4.  Calendar Integration
    5.  No Tracking
    6.  PGP Encryption
    7.  Spam Filter
    8.  Two-factor Authentication
    9.  Automatic Backup
    10.  Real time collaboration
    11.  Support for Aliases
    12.  Cloud Sync

    Mailbox.org VS Mailfence

     
  7. Fastmail icon

    Fastmail

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

    Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email programs. Excellent for businesses with compliance features.

    72 Fastmail alternatives

    License model

    Application types

    Country of Origin

    • AU flagAustralia

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Fastmail screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  Support for Aliases
    2.  Ad-free
    3.  Full-Text Search
    4.  Two-factor Authentication
    5.  Email Organizer
    6.  Reminders
    7.  No Tracking
    8.  Spam Filter
    9.  Calendar Integration
    10.  Calendar View
    11.  Mail Filtering
    12.  Integrated Spam Protection

    Fastmail VS Mailfence

     
  8. Vivaldi Mail icon

    Vivaldi Mail

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

    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...

    99 Vivaldi Mail alternatives

    License model

    • Free • Proprietary

    Application types

    Country of Origin

    • NO flagNorway

    Platforms

    • Online
    • Vivaldi
    Mail

    Properties

    1.  Support for Themes

    Features

    1.  IMAP Support
    2.  Ad-free
    3.  POP3 Support
    4.  PGP Encryption
    5.  Email Organizer
    6.  Mail Filtering
    7.  GPG Encryption
    8.  Two-factor Authentication
    9.  Spam Filter
    10.  Calendar View
    11.  Unified inbox
    12.  Calendar Integration

    Vivaldi Mail VS Mailfence

     
  10. Mailo icon

    Mailo

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

    The mail service which respects you.

    82 Mailo alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • FR flagFrance
    • European Union flagEU

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • OpenPGP
    Mobile

    Properties

    1.  Privacy focused
    2.  Lightweight

    Features

    1.  IMAP Support
    2.  PGP Encryption
    3.  POP3 Support
    4.  Cloud Sync
    5.  No Tracking
    6.  GPG Encryption
    7.  Calendar Integration
    8.  Spam Filter
    9.  Ad-free
    10.  End-to-End Encryption
    11.  Two-factor Authentication
    12.  Mail Filtering

    Mailo VS Mailfence

     
  11. GMX icon

    GMX

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

    GMX Mail is a German-based free webmail service provided by GMX (Global Mail Exchange). In addition to an e-mail address, each GMX account includes a Mail Collector, Address Book, Organizer, and File Storage.

    60 GMX alternatives

    License model

    • Free • Proprietary

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Main Page

    GMX Features

    1.  Multiple Account support
    2.  Two-factor Authentication
    3.  Mail Filtering
    4.  POP3 Support
    5.  Encrypted Email
    6.  IMAP Support
    7.  Mail collector
    8.  WebDAV Support
    9.  CalDAV Support

    GMX VS Mailfence

     
  12. Kolab Now icon

    Kolab Now

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

    Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.

    License model

    Application types

    Country of Origin

    • CH flagSwitzerland

    Platforms

    • Online
    • Software as a Service (SaaS)
    • DAVx5
    Kolab Now email

    Properties

    1.  Privacy focused

    Features

    1.  Support for Aliases
    2.  Real time collaboration
    3.  End-to-End Encryption
    4.  CalDAV Support
    5.  WebDAV Sync
    6.  CardDAV Support

    Kolab Now VS Mailfence

     
  13. VFEmail icon

    VFEmail

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

    Free email with privacy and security.

    License model

    • Freemium • Proprietary

    Application types

    Platforms

    • Online

    VFEmail Features

    1.  GPG Encryption
    2.  PGP Encryption
    3.  IMAP Support
    4.  POP3 Support
    5.  SMTP Support

    VFEmail VS Mailfence

     
  14. Mailture icon

    Mailture

     Like
    Copy a direct link to this comment to your clipboard

    Mailture, a secure, business-oriented email service, is made to cater to all your emailing needs. With top-notch collaboration and communication features, Mailture offers much more than your usual inbox.

    License model

    Application types

    Country of Origin

    • GB flagUnited Kingdom

    Platforms

    • Software as a Service (SaaS)
    Account Overview
    Discontinued

    The website is unavailable.

    Top Mailture Features

    1.  Real time collaboration
    2.  WYSIWYG Support
    3.  Ad-free
    4.  Calendar View
    5.  Email Scheduling
    6.  Email Organizer
    7.  Task Time Tracking
    8.  Mail Filtering
    9.  Support for Aliases
    10.  Spam Filter
    11.  No Tracking
    12.  Cloud Sync

    Mailture VS Mailfence

     
  15. mail2world icon

    mail2world

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

    the free email that has everyone talking!.

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Online

    mail2world Features

    1.  Spam Filter
    2.  Bookmarks

    mail2world VS Mailfence

     
12 of 12 Mailfence alternatives