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Superhuman Mail vs Slashy: catalog facts
Superhuman Mail	Slashy
Paid Paid subscription; see the site for current plans.	Freemium Pricing is not listed on the homepage; a sales demo can be booked.
Web	macOS, iOS
Keyboard-driven workflow for fast inbox processing Works with existing Gmail and Outlook accounts	Drafts replies in the user's own voice Handles meeting scheduling and follow-ups
Only supports Gmail and Outlook accounts Paid product, bundled into a wider suite	Built around Gmail rather than any mail provider Pricing is not clearly stated on the site
Web application, Hosted service	Downloadable app
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 24, 2026	Official website Full listing and sources Checked October 2, 2026

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