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Missive vs Spike: catalog facts
Missive	Spike
Freemium Can be tried for free; team plans are listed on the pricing page.	Freemium Free for individuals; paid plans add AI and team features.
Web	Windows, macOS, Android, iOS
Shared inboxes with internal comments on emails Assignment and statuses show who is handling each message	Chat-style layout can make long threads easier to follow AI features aim to help with organizing and responding faster
Hosted service that requires an account Aimed at teams rather than individual users	Chat-style format is a matter of preference and not for everyone Advanced AI and team features require a paid plan
Downloadable app, Web application, Hosted service	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 September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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