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Proton Unveils Beta Desktop App: Elevating User Experience with Offline Functionality and Enhanced Security Features

Proton, a trailblazer in privacy-focused communication, has recently unveiled a groundbreaking beta version of its desktop app, marking a significant leap forward in user experience. This latest release offers users full-fledged access to both Proton Mail and Proton Calendar on desktop environments, optimized for both Windows and macOS. The app, in line with Proton's unwavering commitment to user privacy, ensures robust end-to-end encryption for sent emails, setting a new standard for secure communication.

One standout feature of the desktop app is its offline functionality, a capability poised to be implemented shortly. In the past, Proton users had the option to access emails offline through a desktop email app, but it required configuring the Proton Mail Bridge. The new desktop app eliminates this prerequisite, providing users with a seamless and convenient experience for viewing and drafting emails offline. The app's caching mechanism ensures that a significant number of emails are available for offline use, delivering enhanced accessibility and convenience.

While the offline feature primarily facilitates viewing and drafting emails without an internet connection, it's important to note that internet access remains a prerequisite for sending and encrypting emails on Proton. This offline functionality proves invaluable for users on the move, enabling them to manage their emails in scenarios where internet connectivity is limited, such as during travel, power outages, or other similar situations.

David Dudok de Wit, Proton's product lead, highlights the local storage aspect of the offline mode in the desktop app. Emails and drafts are stored locally, enabling users to access a limited number of both read and unread emails while offline. To further bolster security, Dudok de Wit recommends that users regularly sign out or clear their desktop app's cache. Proton is actively working on incorporating additional security features, underscoring the company's commitment to user data protection.

In a bid to enhance the overall Proton experience, the company has introduced encrypted auto-forwarding for paid users, available on both the desktop and browser versions of Proton Mail. Notably, the end-to-end encryption for forwards applies exclusively when the forwarded emails are sent to other Proton users. This feature requires the recipient's agreement to the forwarding, and Proton's servers cannot access forwarded emails. Instead, Proton issues a new private key to the forwarded email recipient, ensuring a secure and private communication channel.


Proton's strategic approach to rolling out the desktop app involves an initial offering to paid "Visionary" tier users, with plans to make it accessible to all users in the early months of 2024. This phased release aligns with Proton's commitment to providing users globally with a comprehensive, secure, and privacy-centric communication platform. The desktop app's beta version marks a milestone in Proton's journey, further solidifying its position as a pioneer in privacy-focused digital communication.

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