Microsoft Mail and Calendar Alternatives

Microsoft Mail and Calendar is described as 'Windows 10 has Mail and Calendar apps already built in' and is a Email Client in the office & productivity category. There are more than 50 alternatives to Microsoft Mail and Calendar for a variety of platforms, including Windows, Mac, Linux, iPhone and Android apps. The best Microsoft Mail and Calendar alternative is Thunderbird, which is both free and Open Source. Other great apps like Microsoft Mail and Calendar are Google Calendar, Betterbird, Fossify Calendar and Evolution.

More about Microsoft Mail and Calendar

Microsoft Mail and Calendar alternatives page was last updated Mar 5, 2025

Nextcloud Mail
13 likes
💌 Mail app for Nextcloud.
Cost / License
Free
Open Source (AGPL-3.0)
Application type
Email Client
Origin
Germany
EU
Platforms
Online
Self-Hosted
Nextcloud
Is Nextcloud Mail a good alternative to Microsoft Mail and Calendar?
Airmail
73 likes
Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.
68 Airmail alternatives
Cost / License
Paid
Proprietary
Application type
Email Client
Origin
Italy
EU
Platforms
Mac
iPhone
iPad
Apple Watch
Is Airmail a good alternative to Microsoft Mail and Calendar?
KMail
49 likes
KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
54 KMail alternatives
Cost / License
Free
Open Source
Application type
Email Client
Origin
Germany
EU
Platforms
Linux
BSD
Is KMail a good alternative to Microsoft Mail and Calendar?
Ad
Morgen
Brings together calendars, to-dos, productivity apps, and schedulers in one platform. Integrates with major services like Google Calendar, iCloud, Todoist, and video conferencing tools such as Zoom. Offers native scheduling simil...

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Sylpheed
62 likes
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
Cost / License
Free
Open Source
Application type
Email Client
Origin
Japan
Alerts
Discontinued
Platforms
Mac
Windows
Linux
BSD
PortableApps.com
+3
Is Sylpheed a good alternative to Microsoft Mail and Calendar?
Mutt
68 likes
Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including RFC2047 support for encoded headers), PGP/MIME (RFC2015), various features to support mailing lists, including...
Cost / License
Free
Open Source
Application type
Email Client
Origin
United States
Platforms
Mac
Windows
Linux
Xfce
Is Mutt a good alternative to Microsoft Mail and Calendar?
The Bat
51 likes
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
54 The Bat alternatives
Cost / License
Paid
Proprietary
Application type
Email Client
Origin
Moldova
Platforms
Windows
+4
Is The Bat a good alternative to Microsoft Mail and Calendar?
Merkuro Calendar
12 likes
Merkuro is a calendar and contact application that allows you to manage your tasks, events and contacts. Merkuro supports both local calendars as well as a multitude of online calendars: Nextcloud, Google® Calendar, Outlook®, Caldav, and many more.
Cost / License
Free
Open Source
Application types
Todo List Manager
Calendar
Origin
Germany
EU
Platforms
Linux
Flathub
Flatpak
+5
Is Merkuro Calendar a good alternative to Microsoft Mail and Calendar?
Superhuman Mail
3 likes
Productivity-centered email application streamlines inbox management, uses AI for drafting responses, automates snippets, summarizes conversations, enables timely sends, integrates calendar and CRM, and includes collaborative features like live views and comments.
Cost / License
Paid
Proprietary
Application type
Email Client
Origin
United States
Platforms
Mac
Online
iPhone
iPad
Android
Android Tablet
Windows
+3
Is Superhuman Mail a good alternative to Microsoft Mail and Calendar?
MailMate
22 likes
Mac IMAP email client featuring keyboard control, Markdown email composition, advanced search capabilities, smart mailboxes, automatic signature handling, cryptographic options with OpenPGP/S-MIME, tagging, multiple notifications, and customizable layouts including widescreen.
69 MailMate alternatives
Cost / License
Paid
Proprietary
Application type
Email Client
Origin
International
Platforms
Mac
S/MIME
OpenPGP
+2
Is MailMate a good alternative to Microsoft Mail and Calendar?
Mail by elementary (formerly Pantheon)
11 likes
Mail is designed to let you manage your email quickly and effortlessly. Its interface is based on conversations, so you can read an entire discussion without having to click from message to message.
Cost / License
Free
Open Source (GPL-3.0)
Application type
Email Client
Origin
United States
Platforms
Linux
elementary OS
Is this a good alternative to Microsoft Mail and Calendar?
HCL Domino
6 likes
An enterprise application server that integrates information into a single workspace, integrates also a full mail server
Cost / License
Paid
Proprietary
Application types
Email Client
Calendar
Origin
India
Platforms
Mac
Windows
Online
Is HCL Domino a good alternative to Microsoft Mail and Calendar?
aerc
9 likes
aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.
Cost / License
Free
Open Source
Application type
Email Client
Platforms
Linux
Is aerc a good alternative to Microsoft Mail and Calendar?