Side-by-side comparison based on expert reviews and community consensus.
Canary Mail
Best for Privacy & AIMozilla Thunderbird
Best OverallPrice
—
—
Summary
Leads the pack on end-to-end encryption and built-in AI writing assistance. PCMag's top pick for users who want modern features without sacrificing security.
The gold standard free email client with decades of reliability. Supports any email provider, runs on all major platforms, and has a massive plugin ecosystem for customization.
Pros
- End-to-end encryption built in — standout privacy feature among email clients
- Built-in AI that can draft and write messages for you
- Works with most major email services
- Available on Android, iOS, macOS, and Windows
- Completely free and open-source with no paywalled features
- Supports multiple email accounts including Gmail, custom domains, and IMAP
- Extensive plugin library for added functionality
- Strong privacy features and no data harvesting
Cons
- Premium features require a paid subscription
- AI and advanced features may feel like overkill for simple email needs
- Smaller community and fewer third-party integrations than Thunderbird
- UI feels dated compared to modern email apps
- Mobile version is not available — desktop only
- Setup can be complex for non-technical users
Our take
Canary Mail is the rare app that takes privacy seriously without making you feel like you're using security software. The AI writing tools are genuinely useful, not gimmicky.
If you want one email client that does everything without costing a dime, Thunderbird is it. The open-source community has kept it sharp, and nothing else at this price point comes close.
Buy
