Mailspring Alternatives & Competitors

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

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

Email that sounds like you, and gets measurably more like you every week. Drafts in Gmail, Outlook, and the browser. Free to start.

Key ForthWrite features:

Voice Matching Auto-draft replies Batch-drafting Works in browser

Try for free freemium $12.0 / Monthly (Standard plan)

Airmail is a lightweight and lightning fast mail client for Mac.

Key Airmail features:

Customizable Interface Integration with Other Apps Unified Inbox Advanced Filtering and Search

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

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

The Power Email App for busy professionals, like you.

Key Postbox features:

Powerful Search Capabilities Integration with Other Tools Customizable User Interface Tab-Based Email Management

Geary is an email application built for GNOME 3.

Key Geary features:

User Interface Integration Conversation View Lightweight

The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.

Key The Bat features:

Security Versatile Filtering System Advanced Automation Robust Backup & Restore

Mutt is a small but very powerful text-based mail client for Unix operating systems. .

Key Mutt features:

Lightweight Highly Configurable Fast Secure

Apps/Evolution - GNOME Wiki!

Key Evolution features:

Feature-Rich Integrations Open Source Supports Multiple Email Protocols

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

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

There’s big news attached.

Key Apple Mail features:

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