Proton Drive

Yes. Proton Drive encrypts your files end-to-end by default, so they're scrambled on your device before upload and Proton can't read them. The apps are open source and have been independently audited, and the service is based in Switzerland under some of the world's strongest privacy laws. It comes from Proton, the team behind Proton Mail, with a long, well-regarded privacy track record. The main trade-off is that it's a younger product with fewer power features than older rivals.

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No. Proton Drive uses end-to-end, zero-knowledge encryption: your files, and even their file names, are encrypted on your device with keys only you hold. Proton stores nothing but encrypted data, so the company cannot see the contents or the names of what you upload.

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For privacy, clearly yes. Proton Drive is end-to-end encrypted and open source, so not even Proton can read your files; Google Drive is not zero-knowledge and mines data for its own services. Google Drive wins on real-time collaboration, Docs and Sheets, search and its huge integration ecosystem, and its free tier is larger. So it comes down to priorities: choose Proton Drive if privacy is paramount, Google Drive if you need collaboration and deep Google integration above all.

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Yes — end-to-end encryption is on by default for your files, folders and even file names, with the keys held only by you. It's one of the few mainstream clouds where E2E is the standard rather than a paid add-on, which is exactly what makes Proton a favourite among privacy-conscious users.

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Very safe. You get end-to-end, zero-knowledge encryption, open-source apps that have been independently audited, and Swiss jurisdiction with strict privacy protections. In practice that means no one but you — not Proton, not an intruder, not an advertiser — can read your files. The main trade-off is maturity: it's a newer service with fewer features than long-established rivals, and because only you hold the keys, safeguarding your password and recovery details is essential.

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Both are excellent, Swiss-based and end-to-end encrypted, so you can't go far wrong. Tresorit is the more mature choice for business, compliance and team administration, with granular access controls and a long enterprise track record. Proton Drive is more affordable, open source, and ideal for individuals — especially anyone already using Proton Mail or Proton VPN. In short: for business and regulated data, Tresorit edges ahead; for personal privacy and value, Proton Drive is the better fit.

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