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Proton Mail - Encrypted Email

by Proton AG

Send and organize email with folders, labels and password-protected messages.

iOSOpen source
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What it does

Send and organize email with folders, labels and password-protected messages. The developer describes end-to-end and zero-access encryption and publishes the app's source code.

Pricing: is Proton Mail - Encrypted Email free?

US App Store download: Free (USD), checked 2026-09-22. Open-source software; hosted services or other add-ons may have separate charges.

Screenshots

Developer-provided iOS screenshots.

Encrypted inbox with folders and message categories.
Encrypted inbox with folders and message categories.
One-click unsubscribe shown inside an email.
One-click unsubscribe shown inside an email.
Inbox view without advertising placements.
Inbox view without advertising placements.
Advanced phishing warning on a suspicious message.
Advanced phishing warning on a suspicious message.

Features

Proton email address

Create a @proton.me or @protonmail.com email address.

Developer’s App Store feature description (iOS)

Encrypted email and attachments

Send and receive encrypted emails and attachments with ease.

Developer’s App Store feature description (iOS)

Multiple accounts

Switch between multiple Proton Mail accounts.

Developer’s App Store feature description (iOS)

Conversation view

Easily manage your email with conversations.

Developer’s App Store feature description (iOS)

Folders, labels, and gestures

Keep your inbox tidy and clean with folders, labels and simple swipe-gestures.

Developer’s App Store feature description (iOS)

Sources & verification

Last verified: 22 September 2026. Features not listed here may be unverified.

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