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Missive vs Spark Mail: catalog facts
Missive	Spark Mail
Freemium Can be tried for free; team plans are listed on the pricing page.	Freemium Free for individuals; paid plans add AI features and team tools.
Web	Windows, macOS, Android, iOS
Shared inboxes with internal comments on emails Assignment and statuses show who is handling each message	Automatic inbox categorization cuts down on manual sorting AI-drafted replies can speed up routine email responses
Hosted service that requires an account Aimed at teams rather than individual users	AI and team features are gated behind a paid plan Some categorization requires manual correction over time
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.