Microsoft Outlook is a popular email and calendar software that offers advanced features for managing emails, calendars, tasks, and contacts.
Starting at $69.99/year
Best Thunderbird Alternatives ranked by AI · updated May 2025
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Thunderbird is a free and open-source email client that offers easy setup and customization options.
Price: Free
🎯 thunderbird.net/en-US
Top 6 Thunderbird alternatives
Mailbird is a feature-rich email client for Windows that offers a modern and clean interface.
Starting from $3.25/month
eM Client is a full-featured email client with a modern and easy-to-use interface.
Starting from $49.95
ProtonMail is an end-to-end encrypted email service based in Switzerland.
Free tier available, premium plans starting at $5/month
Tutanota is an open-source end-to-end encrypted email software and freemium hosted secure email service.
Freemium
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
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