Proton launches Sheets, a privacy-first encrypted alternative to Excel and Google Sheets
Proton has launched Proton Sheets, a new end-to-end encrypted spreadsheet app for web users seeking privacy-focused alternatives to Google Sheets or Microsoft Excel. Unlike major competitors, all spreadsheet content in Proton Sheets, including filenames and metadata, is encrypted by default, and Proton states that none of this data is used for AI training, creating a clear privacy contrast with Big Tech tools.
This new Proton Sheets offers familiar spreadsheet features such as formulas, charts, and graphs. Real-time collaboration is enabled, with all data exchanges remaining under full encryption. Users may import CSV or XLS files, which are encrypted immediately upon upload to maintain security across formats. Access management tools allow users to specify and revoke view or edit privileges for each spreadsheet.
These features are available through web browsers and within the Proton Drive app, which now offers email, calendar, documents, and encrypted spreadsheets as part of its expanding productivity suite.




Comments
Good news, I recently switched to Kdrive for docs, sheets, and presentations, which is OnlyOffice btw. What Office Suite Proton is using for this?
Don't believe anything proprietary, especially server-side, that promotes itself on security. Better get self-hosted open source.
Code: https://github.com/ProtonMail/WebClients
All the Proton services (including the paid ones) are open source, and you can find them on Github.
Those are clients, not servers.
As a Linux user I obviously want them to finally make a drive app and I do get a little frustrated every time they announce anything that is not that. On the other hand, I know the business revenue is the big pillar of a sustainable service, and I'm glad that proton is moving toward growing that side because I want the to be a relevant player that can stand for the privacy ethos, not just a nobody that will be easily ignored. So I'm just happy that they are also striving to growing an actual business that can stand by itself for many years to come, as long as they keep the principles and focus. Now do the damn linux drive app.
Well said
Thank you Proton, this is great, but no Drive app for Linux. :(