Stage
Function
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Proton Mail
1 Plenty for usersEnd-to-end encrypted email from a Swiss nonprofit-aligned foundation; free tier with no ads or scanning, paid plans fund the service without monetising user data.
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Gmail
3 Cashing inFree email with powerful search, paid behind Workspace; ads and AI features tie identity to Google’s broader stack.
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iCloud Mail
3 Cashing inApple ID–tied mail: works well inside the garden; storage tiers and device bundle pressure nudge paid iCloud+.
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Outlook
3 Cashing inConsumer inbox on the Microsoft graph: Microsoft 365 upsells, Focused Inbox, and account convergence toward paid bundles.
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Yahoo Mail
4 Nobody winsLegacy free mail: heavy ads, pay-to-remove-ad tiers, and brand decay; still used as a durable address by many.