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Spike vs Missive: catalog facts
Spike	Missive
Freemium Free for individuals; paid plans add AI and team features.	Freemium Can be tried for free; team plans are listed on the pricing page.
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	Shared inboxes with internal comments on emails Assignment and statuses show who is handling each message
Chat-style format is a matter of preference and not for everyone Advanced AI and team features require a paid plan	Hosted service that requires an account Aimed at teams rather than individual users
Downloadable app	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 23, 2026

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