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