Alternatives to Kontact

Thunderbird

Thunderbird is an open source, cross-platform email client and news reader developed by the Mozilla Foundation. It is designed to be powerful, yet easy to use and customize. It offers a range of features such as an address book, message organization, multiple account support, mes...

Works well and easy to install.

Guest

Microsoft Office Outlook

Microsoft Office Outlook is a personal information manager from Microsoft, commonly used as an email application, calendaring, task manager, contact manager, and note taking. It is part of the Microsoft Office suite of applications, included in the Professional and higher edition...

eM Client

eM Client is a powerful and user-friendly email client and calendar application. It allows you to sync your emails, contacts and calendars across multiple devices. It has an easy to use interface and supports a variety of popular email services such as Gmail, Outlook and Exchange...

Evolution

Evolution is an online office suite and productivity platform that helps you to manage your documents, tasks, emails, and more. It offers a suite of tools to help you organize, collaborate, and stay productive. You can create and share documents, manage tasks and emails, and trac...

Apple Mail

Apple Mail is a built-in email client that comes with macOS and iOS. It allows users to send and receive emails, manage contacts, and organize their emails. It also includes a number of useful features such as an integrated calendar, notes, and to-do list. It supports a variety o...

OpenProject

OpenProject is an open-source software application that helps organizations manage their projects and resources in a unified environment. It is designed for project teams of all sizes, from small to large. OpenProject provides a wide range of features, including task tracking, re...

Claws Mail

Claws Mail is an open-source, free email client with a modern user-friendly interface. It can be used with multiple accounts in various formats, including POP3 and IMAP. Claws Mail offers a range of features to make managing your emails easier, such as customizable filters, suppo...

It is an email client, just like KMail.

Guest

Postbox

Postbox is an email management app (or website) designed to help users better organize and manage their emails. It provides powerful features for organizing, sorting, and searching emails, as well as advanced features for Gmail, Outlook, and other popular email services. Postbox'...

Mailspring

Mailspring is an open source email client for Mac, Windows, and Linux. It offers powerful features to help you manage your inbox, including a unified view of all your accounts, smarter search, snooze and follow-up reminders, and an integrated calendar to help you stay organized. ...

Geary

Geary is a free and open source email client that is designed to provide users with an efficient and intuitive way to manage their email accounts. Geary is built to make email management easier for users by providing a modern, intuitive interface that makes it easy to quickly acc...

Airmail

Airmail is an email application that provides users with a powerful, fast and efficient way to manage their email accounts. It is designed to be a streamlined workflow allowing users to easily manage multiple accounts and quickly access their messages, contacts, and attachments. ...

Open365

Open365 is a cloud-based office and productivity suite that provides users with access to a wide range of tools and features to help them work more efficiently. It integrates with various third-party applications and services to create a comprehensive office collaboration environ...

Discontinued The project seems to be no longer developed. The last commit to the GitHub repository was on June 27, 2016, but it can still be downloaded and installed.

Guest

Mutt

Mutt is an open-source email client for Linux, BSD, and other UNIX-like systems. It is lightweight, highly configurable, and supports a wide range of protocols such as IMAP, POP, SMTP, and S/MIME. Mutt also allows users to read and send emails, as well as manage and organize thei...

EssentialPIM

EssentialPIM is an award-winning personal information manager (PIM) software. It's designed to help users store, organize, and manage their personal information such as contacts, appointments, tasks, notes, to-do lists, passwords, and much more. It includes a calendar, to-do list...

Sylpheed

Sylpheed is a free, open-source, lightweight email and news client for Windows, Mac, Linux, and other Unix-like operating systems. It features an intuitive, user-friendly interface, support for multiple accounts, and a powerful filtering system. With Sylpheed, users can easily ma...

Microsoft Mail and Calendar

Microsoft Mail and Calendar is a free app and website that allows users to stay organized and connected. The app provides users with the ability to create and manage multiple email accounts, create and manage calendars for appointments and events, share calendars with others, and...

Polymail

Polymail is an app and website designed to help users keep up-to-date with the latest news and books. It offers personalized recommendations based on users’ interests and provides easy access to the latest content from leading publishers and authors. Polymail provides an intuitiv...

The Bat

The Bat is a secure, reliable, and powerful email client designed to help you maximize your productivity. It is packed with features to help you manage your email accounts, contacts, calendar, and more. It offers a powerful spam filter, secure encryption for your email messages, ...

Canary Mail

Canary Mail is an email app and website that offers a modern and secure way to access, read, and organize emails. It is designed to help users save time and be productive by bringing together the best of modern design and security. It offers powerful features such as email encryp...

Trojitá

Trojitá is an open source cross-platform email client designed for efficient and secure email communication. It features a modern user interface, delivering a fast, secure and lightweight email experience. Trojitá supports a broad range of email protocols, including IMAP, SMTP, a...

Kontact - KMail

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