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Slashy vs Spark Mail: catalog facts
Slashy	Spark Mail
Freemium Pricing is not listed on the homepage; a sales demo can be booked.	Freemium Free for individuals; paid plans add AI features and team tools.
macOS, iOS	Windows, macOS, Android, iOS
Drafts replies in the user's own voice Handles meeting scheduling and follow-ups	Automatic inbox categorization cuts down on manual sorting AI-drafted replies can speed up routine email responses
Built around Gmail rather than any mail provider Pricing is not clearly stated on the site	AI and team features are gated behind a paid plan Some categorization requires manual correction over time
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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