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Shortwave vs Superhuman Mail: catalog facts
Shortwave	Superhuman Mail
Freemium Free to start with no credit card required, with paid options for more features.	Paid Paid subscription; see the site for current plans.
Windows, macOS, Android, iOS	Web
AI filters written in plain English Drafts replies that match your writing style	Keyboard-driven workflow for fast inbox processing Works with existing Gmail and Outlook accounts
Built for Gmail accounts Relies on a hosted AI service that processes your mail	Only supports Gmail and Outlook accounts Paid product, bundled into a wider suite
Downloadable app, Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.