Meet the contenders

Whether you're a freelancer, small business owner, or corporate executive, there's an email app for you. We're here to help you decide.

Let's look at how these two email apps stack up against each other.

Thunderbird

Thunderbird is a free, open-source, cross-platform email client that’s managed by a core staff and a community of volunteer developers. Although the app is already quite robust, there are optional add-ons that you can install to enhance its functionality. So, when it comes to cost-effective email client apps, you can’t go wrong with free—there are no separate paid versions.

Superhuman

Superhuman is a keyboard-focused email client that supports a variety of email providers, including Gmail and Outlook. With more than 100 keyboard shortcuts, Superhuman is designed for professional users and teams who need to collaborate regularly. Although an excellent option for professionals who manage large volumes of messages every day, Superhuman’s robust business and productivity tools may be a bit overkill for casual users.

Thunderbird vs Superhuman: A side-by-side comparison

	Thunderbird	Superhuman
Operating system	WindowsmacOSLinuxAndroid	Windows macOS iOS Android Web
Versions	Free	Starter Business Enterprise
Price(s)	Free	Starter: $30/user /month Business: $40 /user /month Enterprise: by contact only
Notable features	Multi-account support Unified inbox Extensive library of add-ons End-to-end encryption (S/MIME and OpenPGP) Junk mail filtering Spam filtering Phishing protection Built-in chat Built-in newsgroup and RSS reader Tabbed email interface Customizable user interface Multi-language support (currently translated into 65 languages)	Multi-account support Fast app performance Unique keyboard shortcut workflow AI-powered, natural language search AI-assisted email authoring Split inbox to prioritize messages Instant replies Follow-up reminders Reusable snippets for common responses Real-time error correction Integration with Gmail and Outlook Some third-party app integrations