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Spike vs Superhuman Mail: catalog facts
Spike	Superhuman Mail
Freemium Free for individuals; paid plans add AI and team features.	Paid Paid subscription; see the site for current plans.
Windows, macOS, Android, iOS	Web
Chat-style layout can make long threads easier to follow AI features aim to help with organizing and responding faster	Keyboard-driven workflow for fast inbox processing Works with existing Gmail and Outlook accounts
Chat-style format is a matter of preference and not for everyone Advanced AI and team features require a paid plan	Only supports Gmail and Outlook accounts Paid product, bundled into a wider suite
Downloadable app	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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