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.
For years, the golden rule of cybersecurity was simple: “If it runs in a browser, don’t trust it with sensitive data.” Browsers are leaky, extensions are malicious, and JavaScript can be exploited. protonmail web app
Is browser-based email finally secure? With Proton, the answer is surprisingly yes. 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) | For years, the golden rule of cybersecurity was