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Index/Topics/ProtonMail End-to-End Encryption

ProtonMail End-to-End Encryption

ProtonMail's end-to-end encryption for desktop access and the requirement of Proton Bridge proxy for third-party clients

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Jan 12, 2026
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Are there alternative desktop clients or plugins that support ProtonMail's E2EE without Bridge?

ProtonMail’s end-to-end encryption for desktop access is built around a proprietary protocol that requires the Proton Bridge proxy for third‑party clients, and reporting indicates there are no fully s...