Proton Mail review
A complete secure email suite with a capable free plan and wide platform coverage.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Proton Mail is an encrypted email service for individuals, organizations, journalists, activists, and businesses. It combines end-to-end encryption for messages between Proton Mail users with zero-access encryption for stored messages and attachments. The service is available through web, Windows, macOS, Linux, iOS, and Android applications. A permanent free plan includes 1 GB of storage and 1 encrypted email address, making Proton Mail a practical starting point for people who want privacy controls without committing to a subscription.
Its paid plans add capacity and account flexibility. Mail Plus includes 15 GB of storage, 10 encrypted email addresses, 1 custom email domain, 10 hide-my-email aliases, and unlimited folders and labels. Proton Unlimited expands storage to 500 GB, includes 15 extra email addresses, supports 3 custom email domains, and provides unlimited hide-my-email aliases. Paid features are particularly relevant for users managing multiple identities, custom-domain mail, or a larger mailbox. Migration is supported through Easy Switch for email, contacts, and calendars, while filters, folders, labels, scheduled sending, undo send, snoozing, phishing protection, suspicious-link confirmation, and tracker blocking cover everyday mail management.
Platform fit is a notable strength. Proton Mail Bridge supports desktop email clients such as Microsoft Outlook, Mozilla Thunderbird, and Apple Mail, while the service also integrates with Gmail and Yahoo Mail. Encrypted calendar access extends the privacy-focused suite beyond email, and the product is open source. Those choosing Proton Mail get a broad set of privacy and productivity features across major platforms, plus migration tools for moving from another provider. Users who only need a basic mailbox may prefer the free tier; organizations or individuals requiring custom domains, more addresses, and additional storage should consider a paid plan.
Proton Mail pros and cons
- Where it wins
- End-to-end encryption and zero-access storage protect messages and attachments
- Free plan includes 1 GB storage and 1 encrypted email address
- Bridge connects desktop clients including Outlook, Thunderbird, and Apple Mail
- Where it doesn't
- Custom domains and expanded storage require a paid plan
- Some desktop-client features depend on Proton Mail Bridge
- Advanced plans may offer more capacity than light email users need
Proton Mail fact sheet, pricing and score →
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