K-9 Mail Alternatives

K-9 Mail Alternatives

K-9 Mail is an open source email client focused on making it easy to chew through large volumes of email. K-9 Mail is designed for both novice and power users and offers lots of features for everyone. It provides features like Push IMAP Support, GPG &a.. read more.

According to people there are many software similar to it, and the best alternative to K-9 Mail is Tutanota which is both freemium and open source. Other highly recommended applications include ProtonMail (Free,Commercial,Pay What You Want) , HEY (Commercial) and Thunderbird (Free).
In total people have suggested 18 alternatives to K-9 Mail that share similarities by use case and feature set.


Tutanota is the world's most secure email service, easy to use and private by design. Tutanota brings secure email for everybody.

Freemium & Open Source
👍 Most people think Tutanota is a good alternative to K-9 Mail.


World's largest secure email service providing end-to-end encrypted email accounts. ProtonMail is based in Geneva, Switzerland and protected by Swiss privacy laws. The software is openly developed with fully open source code.

Free , Commercial , Pay What You Want & Open Source
👍 Most people think ProtonMail is a good alternative to K-9 Mail.


HEY is a privacy focused commercial email provider. It brings a fresh approach and transforms email into something you want to use, not something you’re forced to deal with.

Commercial & Proprietary
👍 Most people think HEY is a good alternative to K-9 Mail.


A free an open-source email client developed openly by the Mozilla Foundation and the community. Thunderbird is easy to setup and customize and supports POP and IMAP. The email client comes with all features needed to search, filter, write and manage emails, but also have builtin support for live chat between contact and RSS/Atom feed reader.

Free & Open Source
👍 Most people think Thunderbird is a good alternative to K-9 Mail.

Zoho Mail

Zoho Mail provides ad-free email hosting for business and organizations. It's comes with intuitive migration tools, along with 24/7 dedicated migration support to ensure smooth, lossless migration from your existing email provider. With Zoho Mail, your organization can manage all their email, calendar and contact needs. Since Zoho Mail is part of the Zoho's suite of online productivity, it's easy to extend the capability in to more parts of Zoho's offering and essentially run your entire business with Zoho. Zoho is provided as a Freemium software, where the free plan supports up to 5 users in an organization.

Freemium & Proprietary
👍 Most people think Zoho Mail is a good alternative to K-9 Mail.


FastMail is a secure, private, independent, online email provider. Get started with FastMail today, with Gmail transfer tool.

Commercial & Proprietary


Postbox is an email provider that supports a full suite of keyboard shortcuts, an extensive set of filters/rules, and intuitive swipe actions on macOS to dispatch messages with ease. You can try Postbox for free and enjoy an intuitive interfaces for managing your email that feels lika a native Mac or Windows application.


Mailbird is a desktop email client with an easy to use and intuetive interface. With Mailbird you can save time managing multiple accounts with the best email client for Windows and macOS.

Commercial & Proprietary


Airmail is a performant mail client for developed for iOS and macOS. The client is designed to provide intuetive interactions native to the Apple ecosystem. Airmail integrates with third-party services and protocols like IMAP, POP3,  iCloud, MS Exchange, Gmail, Google Apps, Yahoo! Mail, AOL, Outlook.com, Live.com.

Freemium & Proprietary

eM Client

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.


Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

How Are These K-9 Mail Alternatives Generated?

Information found on this page is crowd-sourced by the community and contains the most agreed upon K-9 Mail alternatives. You can use this information to find similar software to K-9 Mail for specific platforms with various pricing options and licenses. Anyone that have previously used K-9 Mail can suggest alternatives, vote on the accuracy of other users claims, and help more people in the process of doing so.

This page was last updated on Sun 23 Jan 2022 (3 weeks, 1 day ago).