Microsoft Mail and Calendar Alternatives & Competitors

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Key Microsoft Outlook features:

Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Key Thunderbird features:

Free and Open Source Customization Cross-Platform Robust Security

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. .

Key MailReach.co features:

Deliverability Improving Email Warming Meaningful Warming Content Smart Warming Algorithm

Visit website paid $19.5 / Monthly (Pro)

Apps/Evolution - GNOME Wiki!

Key Evolution features:

Feature-Rich Integrations Open Source Supports Multiple Email Protocols

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat. .

Key eM Client features:

Email Calendar Task management Events

freemium

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

Key Spark Mail features:

Smart Inbox Collaborative Email Customization Unified Inbox

Open Source

Mailbird is the best email client for Windows 7, 8 and 10.

Key Mailbird features:

User-Friendly Interface Integration with Third-Party Apps Speed and Performance Unified Inbox

There’s big news attached.

Key Apple Mail features:

Integration with Apple Ecosystem User Interface Privacy and Security Customizable Mail Rules

K-9 is an opensource email client making it easy to chew through large volumes of email.

Key K-9 Mail features:

Open Source Customizability Privacy-Focused Supports Multiple Email Protocols

Spend less time managing your day & more time enjoying it.

Key Google Calendar features:

Cross-Platform Accessibility Integration with Other Google Services Collaborative Features Event Notifications

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response.

Key Claws Mail features:

Lightweight Customizable Fast Performance Open Source

Mailspring is a mail client for Mac, Windows and Linux.

Key Mailspring features:

User Interface Unified Inbox Advanced Search Customization

Open Source

Geary is an email application built for GNOME 3.

Key Geary features:

User Interface Integration Conversation View Lightweight

Material design open source calendar for Android.

Key Etar features:

Open Source Privacy-Friendly Customizable Ad-Free