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BlueMail vs Spark Mail: catalog facts
BlueMail	Spark Mail
Freemium The client is free to download. Some features are reserved for paid plans.	Freemium Free for individuals; paid plans add AI features and team tools.
Windows, macOS, Linux, iOS	Windows, macOS, Android, iOS
One inbox covers many accounts across Windows, macOS, Linux, Android and iOS with a consistent interface and shared…	Automatic inbox categorization cuts down on manual sorting AI-drafted replies can speed up routine email responses
It is closed source, some features need a paid plan, and its handling of account credentials has drawn…	AI and team features are gated behind a paid plan Some categorization requires manual correction over time
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 22, 2026	Official website Full listing and sources Checked September 22, 2026

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