Looking for an alternative to Microsoft Outlook?

Tuta Calendar

for #Calendar

Replaces
Google Calendar
Microsoft Outlook

An encrypted calendar inside the Tuta mailbox

Posteo

for #Email

Replaces
Gmail
Microsoft Outlook
Yahoo Mail

A one-euro mailbox with no ads and no tracking

StartMail

for #Email

Replaces
Gmail
Microsoft Outlook

A private mailbox from the makers of Startpage

Runbox

for #Email

Replaces
Gmail
Microsoft Outlook

Norwegian mail on hydroelectric power

Mailbox.org

for #Email

Replaces
Gmail
Google Workspace
Microsoft Outlook

A German mailbox with an office suite attached

Mailfence

for #Calendar

Replaces
Gmail
Microsoft Outlook

Belgian mail with proper OpenPGP key management

Kontact

for #Calendar

Replaces
Gmail
Microsoft Outlook

KDE's integrated mail, calendar and contacts

FairEmail

for #Email

Replaces
Gmail
Microsoft Outlook

A privacy-first mail client for Android

K-9 Mail

for #Email

Replaces
Gmail
Microsoft Outlook

The open-source Android mail client, now Thunderbird

GNOME Evolution

for #Calendar

Replaces
Microsoft Outlook

A full groupware client for the GNOME desktop

Claws Mail

for #Email

Replaces
Microsoft Outlook
Mozilla Thunderbird

A fast, keyboard-driven mail client

Canary Mail

for #Email

Replaces
Apple Mail
Gmail
Microsoft Outlook

A mail client with encryption and AI assistance

Thunderbird

for #Email

Replaces
Apple Mail
Microsoft Outlook

The long-running open-source mail client

Tuta Mail

for #Email

Replaces
Gmail
Microsoft Outlook
Yahoo Mail

Encrypted email with open-source clients

Fastmail

for #Calendar

Replaces
Gmail
Google Calendar
Microsoft Outlook

A long-established independent mail and calendar host

Proton

for #Calendar

Replaces
1Password
Gmail
Google Workspace

Privacy, end to end