Microsoft Outlook Alternatives

Apps similar to Microsoft Outlook include Thunderbird, which is free and open source. Other options are K-9 Mail, Betterbird, Evolution and FairEmail. There's no shortage of Email Clients like Microsoft Outlook, with more than 100 alternatives for Windows, Mac, Linux, iPhone and Android.

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Most Microsoft Outlook alternatives are Email Clients, but you can also narrow the list to Calendar Apps or Todo List Managers. Other popular filters are Linux, Open Source, Windows, Android and EU. You can also filter for EU-based alternatives if you prefer software from the European Union.

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Microsoft Outlook alternatives page was last updated Oct 1, 2026

Geary
110 likes
Geary is an email application built around conversations, for the GNOME 3 desktop.
55 Geary alternatives
Cost / License
Free
Open Source
Application type
Email Client
Origin
United States
Platforms
Linux
BSD
Flathub
GNOME
Flatpak
Linux Mobile
United States
Good alternative?Is Geary a good alternative to Microsoft Outlook?

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1comment
Geary vs Microsoft Outlook Comments
Positive comment by Guest · Sep 26, 2020
Beatiful frontend Stable working Advanced features
1 of 1 comments
Geary is Free and Open SourceMicrosoft Outlook is Paid and Proprietary
Geary is Lightweight and Privacy focusedMicrosoft Outlook is not according to our users
Claws Mail
106 likes
Email and news client on GTK+ foundation featuring quick performance, extensible plugins, secure protocols, advanced filtering, strong folder and contact management, lightweight design, powerful search, customizable interface, multi-language support, and encryption.
75 Claws Mail alternatives
Cost / License
Free
Open Source
Application typeApplication types
Email Client
Calendar
Platforms
Windows
Linux
BSD
Good alternative?Is Claws Mail a good alternative to Microsoft Outlook?

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1comment
Claws Mail vs Microsoft Outlook Comments
Negative comment by Guest · Jan 18, 2020
Claws Mail is email only, does not have many of the features of Outlook. Displaying HTML mail is sketchy at best.
1 of 1 comments
Claws Mail is Free and Open SourceMicrosoft Outlook is Paid and Proprietary
Claws Mail is Lightweight, Customizable and Privacy focusedMicrosoft Outlook is not according to our users
Zirbe
8 likes
Email that feels like texting — a free, open-source iOS and iPadOS email client that renders every thread as a conversation of bubbles. No backend, no account.
20 Zirbe alternatives
Cost / License
Free
Open Source (MIT)
Application type
Email Client
Origin
United States
Platforms
iPhone
United States
Good alternative?Is Zirbe a good alternative to Microsoft Outlook?
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Mailbird
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EssentialPIM
79 likes
The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.
183 EssentialPIM alternatives
Cost / License
Freemium
Proprietary
Application typeApplication types
Todo List Manager
Task Management
Origin
Estonia
EU
Platforms
Windows
Android
iPhone
Estonia
EU
+9
Good alternative?Is EssentialPIM a good alternative to Microsoft Outlook?

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1comment
EssentialPIM vs Microsoft Outlook Comments
Positive comment by Guest · Dec 13, 2016
Tricky to configure. Does not speak MAPI, but many Cloudservices. I was not successful to synchronize OwnCloud
1 of 1 comments
EssentialPIM is Freemium and ProprietaryMicrosoft Outlook is Paid and Proprietary
EssentialPIM is a Todo List Manager Microsoft Outlook is an Email Client
Apple Calendar
149 likes
Keep track of your busy schedule and share it with others using Calendar. Create separate calendars — one for home, another for school, a third for work, and so on. See all your calendars in a single window or choose to see only the calendars you want.
143 Apple Calendar alternatives
Cost / License
Free
Proprietary
Application type
Calendar
Origin
United States
Platforms
Mac
iPhone
iPad
iCloud
United States
+1
Good alternative?Is Apple Calendar a good alternative to Microsoft Outlook?

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5comments
Apple Calendar vs Microsoft Outlook Comments
Top Negative Comment by Guest · Sep 18, 2019
it's a calendar app not a email client!
Negative comment by Guest · Dec 19, 2019
Apple Calendar is a Calendar. It's a minimal part of what Outlook mail client provides.
Negative comment by Guest · Dec 14, 2018
outlook its not just calendar
3 of 5 comments
Apple Calendar is Free and ProprietaryMicrosoft Outlook is Paid and Proprietary
Apple Calendar is a Calendar Microsoft Outlook is an Email Client
Canary Mail
29 likes
Secure email app for Mac, iPhone, Android and Windows with AI Copilot, PGP encryption, read receipts and one unified inbox.
78 Canary Mail alternatives
Cost / License
Freemium
Proprietary
Application typeApplication types
Email Client
Calendar
Origin
Singapore
Platforms
Mac
Windows
Android
iPhone
iPad
Apple Watch
Singapore
+9
Good alternative?Is Canary Mail a good alternative to Microsoft Outlook?
BlueMail
34 likes
BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
47 BlueMail alternatives
Cost / License
Free Personal
Proprietary
Application typeApplication types
Email Client
Calendar
Origin
United States
Platforms
Mac
Windows
Linux
Android
iPhone
Chrome OS
Android Tablet
iPad
Apple Watch
HUAWEI AppGallery
United States
+9
Good alternative?Is BlueMail a good alternative to Microsoft Outlook?

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1comment
BlueMail vs Microsoft Outlook Comments
Positive comment by rstefan · Sep 11, 2020
much lighter, faster more responsive than outlook both in windows and Android. vivid and vibrant colors and ergonomic menu
1 of 1 comments
BlueMail is Free Personal and ProprietaryMicrosoft Outlook is Paid and Proprietary
BlueMail is Lightweight and Privacy focusedMicrosoft Outlook is not according to our users
Mailpile
118 likes
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.
Cost / License
Free
Open Source
Application typeApplication types
Email Client
WebMail Provider
Alerts
Discontinued
Platforms
Linux
Online
Self-Hosted
OpenPGP
Good alternative?Is Mailpile a good alternative to Microsoft Outlook?
TypeApp
31 likes
TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email accounts.
61 TypeApp alternatives
Cost / License
Free Personal
Proprietary
Application type
Email Client
Origin
United States
Platforms
Mac
Linux
Android
iPhone
Android Tablet
iPad
Android Wear
Kindle Fire
United States
+6
Good alternative?Is TypeApp a good alternative to Microsoft Outlook?
Sterna Mail
4 likes
Android email app focused on privacy and security, supporting JMAP, IMAP, and SMTP protocols, encrypted credentials, OpenPGP through OpenKeychain, unified inbox, conversation threading, offline mode, strong tracking protection, F-Droid distribution, no ads or Google dependence.
10 Sterna Mail alternatives
Cost / License
Free
Open Source (GPL-3.0)
Application type
Email Client
Platforms
Android
Good alternative?Is Sterna Mail a good alternative to Microsoft Outlook?
Kontact
37 likes
Personal Information Manager (Mail, Contact, Calendar and more).
Cost / License
Free
Open Source
Application typeApplication types
Calendar
Email Client
Origin
Germany
EU
Platforms
Linux
Flathub
Germany
EU
Good alternative?Is Kontact a good alternative to Microsoft Outlook?
Spike
36 likes
Transform your email inbox into a collaborative workspace with Spike. Enjoy integrated chat-like emails, tasks, collaborative notes, and group projects. Seamlessly manage multiple accounts, organize priorities, and schedule meetings across devices.
70 Spike alternatives
Cost / License
Freemium
Proprietary
Application type
Email Client
Origin
Israel
Platforms
Mac
Windows
Online
Android
iPhone
Chrome OS
Android Tablet
iPad
Software as a Service (SaaS)
Meta Quest
Israel
+4
Good alternative?Is Spike a good alternative to Microsoft Outlook?

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1comment
Spike vs Microsoft Outlook Comments
Positive comment by Guest · Sep 11, 2019
Brings all of my communications into one place. Also allows for easier sending, saving, and sharing of files shared amongst my teams.
1 of 1 comments
Spike is Freemium and ProprietaryMicrosoft Outlook is Paid and Proprietary

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Microsoft Outlook Alternatives

Alternatives list

Geary

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Geary vs Microsoft Outlook Comments

Claws Mail

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Claws Mail vs Microsoft Outlook Comments

Zirbe

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EssentialPIM

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EssentialPIM vs Microsoft Outlook Comments

Apple Calendar

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Apple Calendar vs Microsoft Outlook Comments

Canary Mail

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BlueMail

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BlueMail vs Microsoft Outlook Comments

Mailpile

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Alerts

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TypeApp

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Sterna Mail

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Kontact

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Spike

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Spike vs Microsoft Outlook Comments