this post was submitted on 29 Jan 2026
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Proton
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Empowering you to choose a better internet where privacy is the default. Protect yourself online with Proton Mail, Proton VPN, Proton Calendar, Proton Drive. Proton Pass and SimpleLogin.
Proton Mail is the world's largest secure email provider. Swiss, end-to-end encrypted, private, and free.
Proton VPN is the world’s only open-source, publicly audited, unlimited and free VPN. Swiss-based, no-ads, and no-logs.
Proton Calendar is the world's first end-to-end encrypted calendar that allows you to keep your life private.
Proton Drive is a free end-to-end encrypted cloud storage that allows you to securely backup and share your files. It's open source, publicly audited, and Swiss-based.
Proton Pass Proton Pass is a free and open-source password manager which brings a higher level of security with rigorous end-to-end encryption of all data (including usernames, URLs, notes, and more) and email alias support.
SimpleLogin lets you send and receive emails anonymously via easily-generated unique email aliases.
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from the team:
When thinking about how Proton Drive apps interact with our backend, our goal was to deliver faster, more reliable file operations across all platforms.
So today, we wanted to share a progress update on the Proton Drive SDK and what it unlocks next.
Behind the scenes, the SDK now powers core file operations across all Proton Drive apps - Windows, macOS, Android, iOS, and web - giving us a shared, more robust foundation instead of separate implementations per platform.
Improvements
By rebuilding Drive’s most performance-intensive code in the SDK, we’ve already delivered major gains: up to 60% faster uploads on iOS, and up to 30% faster uploads and 70% faster downloads on web, with better reliability on unstable networks.
Support
What does the SDK support right now? Currently, it supports core file operations such as uploading and downloading, creating folders, renaming and moving items, and deleting or restoring files. Authentication and Proton-specific modules aren’t supported yet, so it’s best suited for contributors and early experimentation.
CLI
To cover workflows not yet supported by the SDK, we’re also building CLI tools. These will let you run common Drive commands and build on top of them without reverse-engineering Proton Drive. We’re aiming to release these next quarter.
What's Next?
Looking ahead to 2026, we’ll migrate all existing Drive features to the SDK and build new ones on top of it — including faster encryption with hardware acceleration, expanded SDK capabilities, a clearer integration path, and a Linux client.
Read the full update: https://proton.me/blog/drive-sdk-january-2026
Stay safe,
Proton team
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I think they realized they can just ride the wave of promises for years. It was the same with their android apps - they promised to share the source code of proton calendar for android "soon". It took them... A few years, I think. Recently, they did similar thing with their new Lumo AI. Big talks about open source, yet no source code shown. People don't pester them about these things that much, so it's basically free publicity.