Software Alternatives, Accelerators & Startups

K9

K9 is an email filtering application that works in conjunction with your regular POP3 email program...

Some of the top features or benefits of K9 are: Cost, Effectiveness, Simplicity, and Customizability. You can visit the info page to learn more.

K9

K9 Alternatives & Competitors

The best K9 alternatives based on verified products, community votes, reviews and other factors.
Filter: 4 Open-Source Alternatives. Latest update:

  1. 13

    Newton is a fully featured mail client available for Android, iOS, macOS and Windows.

    Key Newton Mail features:

    Feature-Rich Cross-Platform Support Unified Inbox Subscription Model

    /newton-mail-alternatives
  2. 15

    myMail is the smart email app for managing all your accounts on iOS and Android.

    Key myMail features:

    User-Friendly Interface Unified Inbox Push Notifications Enhanced Security

    /mymail-alternatives
  3. Smart hosting solutions for small businesses, eCommerce, and personal websites.

    Key InfinyHost features:

    Affordability Ease of Use Customer Support Performance

    Try for free paid Free Trial $3.95 / Monthly

    Try for free
  4. 15

    Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.

    Key Gmail features:

    Generous Storage Integration with Google Services Powerful Search Functionality Spam and Virus Protection

    /gmail-alternatives
  5. 13

    Android Mail Client.

    Key Aqua Mail features:

    User-Friendly Interface Multiple Account Support Customizability Integration with Popular Services

    /aqua-mail-alternatives
  6. 11

    Secure email with absolutely no compromises. Get your free encrypted email account today.

    Key ProtonMail features:

    End-to-End Encryption Zero Access to User Data Swiss Privacy Laws Open Source

    freemium €5.0 / Monthly (user - 5 GB)

    /protonmail-alternatives
  7. 13

    Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

    Key Microsoft Outlook features:

    Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

    /microsoft-outlook-alternatives
  8. 12

    Open source, privacy friendly email app.

    Key FairEmail features:

    Privacy-first Open Source Feature-rich Customizable

    Open Source

    /fairemail-alternatives
  9. 12

    Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

    Key Spark Mail features:

    Smart Inbox Collaborative Email Customization Unified Inbox

    Open Source

    /spark-mail-alternatives
  10. 10

    Get your encrypted mailbox for free.

    Key Tutanota features:

    Privacy-Focused Open Source GDPR Compliant Ad-Free Experience

    Open Source

    /tutanota-alternatives
  11. The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.

    Key Spamihilator features:

    High Efficiency Customizable Filters Compatibility User-Friendly Interface

    /spamihilator-alternatives
  12. 10

    Spamato is a spam filter system that combines several anti-spam techniques, from which thousands of...

    Key Spamato features:

    Multi-Engine Filtering Open Source Platform Independence User Customization

    /spamato-alternatives
  13. 11

    Home · Products · Mods · Liquids · Contact Us · Where To Buy. The Boxer Mod. Featuring a YiHi SX350J-v2 Chipset. Evolv DNA200. and now Evolv DNA75.

    Key Boxer features:

    Unified Inbox Quick Replies Swipe Gestures Task Management

    /boxer-alternatives
  14. POPFile classifies email into categories you define.

    Key POPFile features:

    Accuracy Customizability Open Source Multi-language Support

    /popfile-alternatives
Suggest an alternative
If you think we've missed something, please suggest an alternative to K9.

K9 discussion

Log in or Post with