Kolab Now AlternativesWebMail Providers & Calendar Apps like Kolab Now

Kolab Now is described as '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' and is a webmail provider in the office & productivity category. There are more than 50 alternatives to Kolab Now for a variety of platforms, including Web-based, Android, iPhone, Windows and Linux apps. The best Kolab Now alternative is Proton Mail, which is both free and Open Source. Other great apps like Kolab Now are Tuta Mail, Zoho Mail, Posteo and Mailbox.org.

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Kolab Now alternatives are mainly WebMail Providers but may also be Email Clients or Mail Servers.  Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Kolab Now.
Kolab Now iconKolab Now
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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.

More about Kolab Now
More about Kolab Now
Kolab Now alternatives page was last updated Mar 23, 2025
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Alternatives
  1. Mailfence icon

    Mailfence

    Sponsored

    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.

    68 Mailfence alternatives

    License model

    • Freemium • Proprietary

    Application types

    Platforms

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

    Properties

    1.  Privacy focused

    Features

    1.  Calendar Integration
    2.  POP3 Support
    3.  IMAP Support
    4.  Ad-free
    5.  Encrypted Email
    6.  OpenPGP
    7.  Mail Filtering
    8.  PGP Encryption
    9.  AES-256 Encryption
    10.  No Tracking
    11.  Two-factor Authentication
    12.  End-to-End Encryption
  2. Proton Mail icon

    Proton Mail

     920 likes
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    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.

    97 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 Kolab Now

     

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

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

    • Proton Mail is Freemium and Open SourceKolab Now is Paid and Open Source
    • Proton Mail is Privacy focusedKolab Now is not according to our users
  4. Tuta Mail icon

    Tuta Mail

     475 likes
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    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.

    95 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 Kolab Now

     
  5. Ad
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    Google Workspace icon
    Google Workspace

    Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management cap...

    https://workspace.google.com
    Learn More
  6. Zoho Mail icon

    Zoho Mail

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

    104 Zoho Mail alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • IN flagIndia

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Apple Watch
    • Android Tablet
    All-in-one view

    Properties

    1.  Privacy focused

    Features

    1.  Custom Domain
    2.  Ad-free
    3.  Mail Filtering
    4.  Virtual office
    5.  Two-factor Authentication
    6.  Document Sharing
    7.  Support for Aliases
    8.  Email reminder
    9.  SMTP Support
    10.  Snooze Mail
    11.  POP3 Support
    12.  Integrated Spam Protection

    Zoho Mail VS Kolab Now

     

    • Zoho Mail is the most popular Android Tablet alternative to Kolab Now.

    • Zoho Mail is Freemium and ProprietaryKolab Now is Paid and Open Source
    • Zoho Mail is Privacy focusedKolab Now is not according to our users
  7. Posteo icon

    Posteo

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

    69 Posteo alternatives

    License model

    Application types

    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 Kolab Now

     

    • Posteo is the most popular commercial alternative to Kolab Now.

    • Posteo is Paid and ProprietaryKolab Now is Paid and Open Source
    • Posteo is Privacy focusedKolab Now is not according to our users
  8. Mailbox.org icon

    Mailbox.org

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

    78 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 Kolab Now

     
  10. Google Workspace icon

    Google Workspace

     139 likes
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    Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management capabilities with 2FA and 24/7 support.

    52 Google Workspace alternatives

    License model

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    Google Workspace screenshot 1

    Google Workspace Features

    1. Google Calendar icon  Sync with Google Calendar
    2.  Two-factor Authentication
    3.  Online collaboration
    4. Google Contacts icon  Google contacts integration
    5.  Sync with Google Drive
    6. Google Sheets icon  Google Sheets integration
    7.  AI-Powered
    8.  Built-in AI Assistant
    9.  Integrated Bulk Emailing

    Google Workspace VS Kolab Now

     
  11. Mailpile icon

    Mailpile

     117 likes
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    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license.

    60 Mailpile alternatives

    License model

    • Free • Open Source

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • OpenPGP
    Mailpile screenshot 1
    Discontinued

    The latest release (1.0.0rc6) was released in September 2019.

    Mailpile Features

    1.  OpenPGP
    2.  Web-Based
    3.  Encrypted Email
    4.  IMAP Support
    5.  POP3 Support

    Mailpile VS Kolab Now

     

    • Mailpile is the most popular Self-Hosted alternative to Kolab Now.

    • Mailpile is Free and Open SourceKolab Now is Paid and Open Source
  12. Nextcloud Hub icon

    Nextcloud Hub

     21 likes
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    Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.

    52 Nextcloud Hub alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Self-Hosted
    Nextcloud Hub screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  Ad-free
    2.  Real time collaboration
    3.  Extensible by Plugins/Extensions
    4.  Cloud Sync
    5.  Photo Gallery

    Nextcloud Hub VS Kolab Now

     
  13. Infomaniak kMail icon

    Infomaniak kMail

     32 likes
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    Infomaniak’s Mail Service is a secure emailing system hosted in Switzerland and is the best (free) alternative to the web giants. Infomaniak’s emailing service is used by more than a million companies and individuals throughout Europe.

    38 Infomaniak kMail alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • CH flagSwitzerland

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Infomaniak kMail screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  Ad-free
    2.  No Tracking
    3.  Portable
    4.  Calendar Integration
    5.  Multiple Account support
    6.  Cloud Sync
    7.  Support for Aliases
    8.  Real time collaboration
    9.  Secure mail
    10.  Sync Contacts
    11.  Calendar Sync
    12.  CardDAV Support

    Infomaniak kMail VS Kolab Now

     
  14. StartMail icon

    StartMail

     26 likes
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    Privacy-focused email service offering easy one-click PGP encryption, 20 GB storage, disposable email addresses, and compatibility with IMAP/SMTP while adhering to Dutch privacy laws to secure data and communications effectively.

    55 StartMail alternatives

    License model

    Application types

    Country of Origin

    • NL flagNetherlands
    • European Union flagEU

    Platforms

    • Online
    StartMail screenshot 1

    Properties

    1.  Privacy focused
    2.  Security-focused

    Features

    1.  Support for Aliases
    2.  No Tracking
    3.  Email Organizer
    4.  Ad-free
    5.  IMAP Support
    6.  Encrypted Email

    StartMail VS Kolab Now

     
  15. Fastmail icon

    Fastmail

     69 likes
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    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.

    68 Fastmail alternatives

    License model

    Application types

    Country of Origin

    • GB flagUnited Kingdom

    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 Kolab Now

     
  16. Enigmail icon

    Enigmail

     71 likes
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    Enigmail is a security extension to Mozilla Thunderbird and SeaMonkey. It enables you to write and receive email messages signed and/or encrypted with the .

    32 Enigmail alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • GnuPG
    • Thunderbird
    • SeaMonkey
    Thunderbird window with Decrypt button

    Enigmail Features

    1.  Encrypted Email

    Enigmail VS Kolab Now

     
13 of 80 Kolab Now alternatives