Protonmail Web: App Link

Even if a hacker steals Proton’s servers, they cannot read your inbox. Why? Because your decryption keys are encrypted with your mailbox password—which Proton never stores.

Use the web app for composing sensitive emails and archive management. Use the mobile app for quick scans. Don't rely on it for massive historical searches. protonmail web app

How does a browser app do encryption that usually requires desktop software? Proton solves this by downloading a local cryptographic engine (OpenPGP) into your browser's memory when you log in. You decrypt your emails locally, read them, and re-encrypt them before they ever hit the cloud. Even if a hacker steals Proton’s servers, they

| Feature | Proton Mail Web | Gmail Web | | :--- | :--- | :--- | | | Basic (subject, sender, body text) | Full AI-powered predictive search | | Offline Mode | Beta (requires dedicated app/bridge) | Native | | Calendar | Built-in (encrypted, basic) | Deep integration (smart scheduling) | | Filters/Sieve | Advanced (Sieve scripting allowed) | Visual rule builder | | Attachments | 25MB standard (up to 100MB paid) | 25MB (expands to Drive) | Use the web app for composing sensitive emails

Then came Proton. The Swiss-based company (creators of Proton VPN) turned the email world upside down by building a web app that doesn’t just look secure—it actually is.