The short answer
If you're asking "should I move from Google Drive to Proton Drive?", the question behind the question usually splits into two cases:
Case A — You care about privacy specifically. Yes, switch. Proton Drive encrypts your files on your device before upload; Google Drive doesn't. That's not a feature difference — it's a fundamental architecture difference. Nothing Google does with 2FA or "enterprise controls" closes the gap. If privacy matters, you use a product where the provider physically cannot read your files, not one where they promise they don't.
Case B — You care about features + collaboration. Google Drive still wins on that axis. Google Docs with real-time collaborative editing is genuinely best-in-class, Google's mobile apps are more polished, and the third-party ecosystem (Zapier integrations, CAD apps, design tools) is massive. Proton Docs is good for 2024 but 2-3 years behind.
Most people are a mix. For that middle case: switch for files that matter privacy-wise (tax docs, medical records, IDs, journalism source material, intimate photos) and keep Google for collaborative work docs you share with others who don't use Proton. Dual-using both is fine — this isn't an all-or-nothing decision.
The rest of this article is the honest, detailed comparison so you can calibrate which mode fits your situation.
Security and encryption — the real difference
Both services encrypt data at rest on their servers and in transit over HTTPS. Where they diverge is who holds the decryption keys.
Proton Drive
Your files are encrypted on your device with keys derived from your account password. The encrypted blobs are what travel to Proton's servers. Proton never has the decryption keys. If Proton's servers are hacked, the attacker gets ciphertext. If Proton is subpoenaed, they can hand over ciphertext but cannot decrypt it. If a Proton employee goes rogue, they see ciphertext.
This is "zero-access" or "zero-knowledge" encryption. It's the same architecture as a properly-set-up password manager (Bitwarden, Proton Pass), as Signal, as iCloud's Advanced Data Protection.
Technical details: AES-256 authenticated encryption, keys derived via a strong KDF, asymmetric keys for sharing. Proton publishes the cryptographic design document at proton.me/blog/protondrive-security. It's been externally audited (Securitum, 2023).
The tradeoff: if you forget your password and lose your recovery phrase, your files are gone. Nobody at Proton can help you. That's not a bug — it's the property that makes zero-access encryption actually zero-access.
Google Drive
Google Drive encrypts files at rest on Google's servers. Google also holds the decryption keys. This means:
- Google's ML pipelines read your files. Gmail's phishing detection, Drive's "find related documents" feature, Google Photos' content-based search — these all require Google's systems to read your content.
- Google's policy bots scan your files. Automated CSAM detection, violence detection, and TOS-enforcement pipelines inspect what you upload. False positives exist — the high-profile 2022 San Francisco case (a father flagged for photos sent to his child's pediatrician) became national news.
- Subpoenas return plaintext. Google receives hundreds of thousands of government data requests per year and complies with the majority. They publish a transparency report. What they hand over is decrypted file contents.
- Workspace admins can see everything. If your Google Drive is part of a Workspace account (work/school), the admin has forensic access to everything you've ever stored.
Google doesn't deny any of this. Their whitepaper explicitly notes that "Google may access user content for specific purposes including serving the product, providing security and abuse prevention, and compliance with legal process."
Verdict on encryption: Proton Drive is structurally more private. Google Drive is structurally more accessible (to Google, to Google's bots, to Google's legal obligations). This is not a feature gap — it's a design gap. It doesn't close with 2FA or paid tiers.
Pricing
Compare apples-to-apples at the 200 GB tier where most consumers land.
| Plan | Proton Drive | Google One |
|---|---|---|
| Free | Up to 5 GB | 15 GB (shared with Gmail + Photos) |
| 100 GB | — | $1.99/month |
| 200 GB | $3.99/month | $2.99/month |
| 500 GB | Included with Proton Unlimited ($12.99/month, bundles Mail + VPN + Pass + Calendar) | — |
| 2 TB+ | Proton Family: 3 TB shared, ~$23.99/month billed annually (up to 6 users) | $9.99/month |
| Family sharing | Yes (6 users on Proton Family) | Yes (6 users on Google One) |
| Annual discount | ~17% vs monthly | ~17% vs monthly |
Takeaways:
- Straight 200 GB Drive-only: Google is cheaper by $1/month ($2.99 vs $3.99). $12/year difference. Not a decision-driver.
- Proton Unlimited is the value play. At $12.99/month you get 500 GB of encrypted storage + Proton Mail + Proton VPN + Proton Pass + Proton Calendar. If you were already going to pay ~$5-10/month for a VPN, a password manager, or an encrypted email, Unlimited pays for itself quickly.
- Free tiers differ in usefulness. Google's 15 GB free is shared across Drive + Gmail + Photos, which fills up fast if you use Gmail heavily. Proton's free tier (up to 5 GB after simple onboarding steps) is small but enough to test-drive the experience.
Features head-to-head
| Feature | Proton Drive | Google Drive |
|---|---|---|
| End-to-end encryption | ✅ Default, always on | ❌ No |
| Open-source clients | ✅ (desktop, mobile, web) | ❌ Closed |
| File upload / download | ✅ Unlimited file size to plan cap | ✅ Max 5 TB per file |
| Folder sync (desktop) | ✅ Windows, macOS (Linux: official CLI; native client in development) | ✅ Windows, macOS, ChromeOS |
| Mobile offline access | ✅ Mark files for offline | ✅ More permissive |
| Collaborative editing | ⚠️ Docs + Sheets, 2-3 years behind | ✅ Best in class |
| Comments on files | ✅ (encrypted) | ✅ |
| Version history | ✅ Up to 200 versions / 10 years (paid plans) | ✅ 30 days retained |
| File sharing links | ✅ End-to-end encrypted to Proton recipients, password-protected links for non-Proton | ✅ Fine-grained permissions |
| Link expiration | ✅ | ✅ |
| Password-protected shares | ✅ | ✅ (paid) |
| Third-party integrations | ⚠️ Limited | ✅ Thousands (Zapier, Figma, Slack, Notion, etc.) |
| Team/Workspace admin | ✅ (Proton Business) | ✅ (Google Workspace) |
| Jurisdiction | 🇨🇭 Switzerland | 🇺🇸 United States |
| Open-source server code | ❌ | ❌ |
| Photos-specific app | ❌ (Proton Drive just stores them) | ✅ Google Photos with AI search, memories, etc. |
Where Google genuinely wins
Google Docs is polished in a way that Proton Docs is not yet. Real-time collab on a 50-page document with 5 people editing works flawlessly on Google; on Proton Docs, it works but with occasional sync lag and a less-dense feature set. Chart types, pivot tables, macros, add-ons — all more advanced on Google.
Google Photos is a separate product but shares storage with Drive. AI-powered face / object / scene search is genuinely useful and has no equivalent in Proton Drive (Proton Drive stores photos but doesn't analyze them — by design, since they can't see decrypted content).
Third-party ecosystem — Google Drive is integrated with every SaaS tool. Zapier, IFTTT, Notion, Airtable, most CAD programs, design tools, accounting tools, CRMs — they all speak Google Drive. Proton Drive does not have this ecosystem.
Mobile app polish — Google's apps have had 15+ years of iteration. Proton's have had 2-4. The gap shows in small things like search speed, thumbnail generation, and offline-cache eviction.
Where Proton genuinely wins
Privacy, as detailed above. This is the single biggest reason to switch.
Bundled suite — if you were already going to pay for a VPN + password manager + private email, Proton Unlimited covers all four at a single price.
Jurisdiction — Switzerland's Federal Act on Data Protection is among the strongest privacy laws globally. US law (CLOUD Act, Stored Communications Act) is weaker.
No content-based account actions — your account can't be suspended because an ML bot mistakes a medical photo for something else. Proton can't see what you upload.
Open-source clients — desktop and mobile apps are all open-source. You can verify the encryption is actually happening.
Proton Mail integration — Proton Drive links send via Proton Mail have an extra layer of end-to-end encryption between Proton users.
Sharing and collaboration
Both products let you share files with:
- Specific users (account-to-account)
- Public links (anyone with the URL)
- Password-protected links
Proton Drive shares between two Proton users are end-to-end encrypted at both ends — the shared file is re-encrypted with the recipient's public key. If the recipient is not on Proton, they get a link to a browser-based decryption view (the key is in the URL fragment, so Proton's servers can't read it but any adversary with the link can).
Google Drive shares give recipients a view directly on Google's servers. No encryption difference between sharer and recipient — Google sees everything either way.
For collaborative work where you need real-time editing with 5+ people on a document, Google Drive is still the smoother experience. Proton Docs is catching up but hasn't closed the gap yet.
Mobile and desktop apps
iOS
- Proton Drive: Full-featured app, biometric unlock, mark-for-offline, search, upload from Photos. Passable but doesn't compete with Google's polish.
- Google Drive: More refined UI, faster thumbnails, tight Google Photos + Gmail integration. The incumbent for a reason.
Android
- Proton Drive: Feature-equivalent to iOS version. Integrates with Android share sheet.
- Google Drive: Pre-installed on most Android devices; deepest possible integration.
Desktop (Windows / macOS / Linux)
- Proton Drive: Native desktop sync for Windows and macOS. No native Linux client yet — Proton ships an official CLI for Linux and a native client is in development as of mid-2026.
- Google Drive: Desktop app on Windows / macOS, nothing official on Linux.
Web
- Both are polished.
Privacy and jurisdiction
Proton Drive is operated by Proton AG in Switzerland. Swiss law:
- Requires a court order for any data request
- Cannot compel Proton to break encryption that Proton doesn't hold keys for
- Is outside the 14 Eyes intelligence-sharing alliance
- Publishes a transparency report showing government requests and response actions
Google Drive is operated by Google LLC in the United States. US law:
- The CLOUD Act lets US authorities request data from US companies globally without foreign jurisdictions' consent
- National Security Letters allow data demands without judicial oversight in some cases
- The "third-party doctrine" historically meant data you voluntarily gave Google had weaker Fourth Amendment protection (evolving via Carpenter, but still weaker than direct-to-user)
- Google publishes a transparency report, which is comprehensive; the response rate to US government requests is ~80%.
If your threat model includes "a government I don't fully trust wants my files", Switzerland > US.
If your threat model is "hackers might breach Google", Google's server-side security is genuinely top-tier and you're probably fine either way. But hackers-breaching-Google is not the main risk; it's what Google (and their subprocessors) do with your files normally that creates the structural difference.
Our recommendation by use case
1. You work with documents privately and don't collaborate much. Switch to Proton Drive entirely. You'll barely notice the feature gap for solo work, and the privacy upgrade is real.
2. You're all-in on Google Workspace for work and can't move without moving the whole team. Keep using Google Drive for work docs. For personal files (tax returns, medical records, IDs, family photos you care about), set up a free or Plus Proton Drive account and move those specifically. Hybrid works.
3. You're paying for a VPN and a password manager separately. Proton Unlimited at $12.99/mo is the value play — you get Drive, Mail, VPN, Pass, Calendar, and it's actually cheaper than paying $8 + $3 + $5 for three separate services.
4. You're on Apple ecosystem with iCloud. Enable iCloud Advanced Data Protection if you haven't (not available in the UK since 2025) — that brings iCloud Drive's security up to Proton's level, and the integration with everything Apple is already tight. Proton Drive becomes redundant unless you want Apple-independence.
5. Photographer / video creator with 1 TB+ of media. Proton Unlimited gets you 500 GB; for 1-2 TB you're looking at upgrading to Proton Family. Google One at $9.99/month for 2 TB is still cheaper at that tier. If photo/video privacy matters less than cost, Google wins. If it does, pay for Proton.
6. You're a journalist, activist, or anyone handling sensitive material. Not just "should switch" — should consider this mandatory. Source material, legal documents, and sensitive research shouldn't live on any provider that can read them. Proton Drive with a strong password, plus a local backup to an encrypted external drive, is the minimum.
Migration caveats worth knowing
Shared-with-you files don't export cleanly. Google Takeout only includes files you own. Files other people shared with you need to be downloaded individually or re-shared from the owner. This is the biggest friction point when migrating.
Google Photos organization doesn't survive. If your Google account has Photos with custom albums, face tags, and AI-generated memories, those are all Photos-product metadata — not actual file content. When you move files to Proton Drive, you lose the organization layer. Plan for a separate photo-organization strategy (local Lightroom catalog, separate photo-hosting service like Ente or Immich self-hosted).
Office file conversions. If you have Google Docs (native format), they're not portable files — they're Google's proprietary format that only works inside Google Docs. Takeout exports them as .docx / .xlsx by default, which Proton Docs can open but may lose formatting. Review each converted doc before deleting the Google original.
Shared drives in Workspace. If you're in a Workspace org, "Shared Drives" (files owned by the org, not you) don't export via personal Takeout. You'd need org admin involvement.
One more thing — Proton Drive is not the only option
This article focuses on Proton Drive because it's the most popular end-to-end encrypted consumer choice. Worth knowing the alternatives if Proton doesn't fit:
- Tresorit — Swiss, E2E encrypted, enterprise-focused. More expensive than Proton, more team-admin features.
- Sync.com — Canadian, E2E encrypted, competitive pricing, less brand recognition.
- pCloud with Crypto add-on — Swiss, E2E encryption is a paid upgrade on top of the regular paid plan. Can be cost-effective for one-time lifetime purchases.
- iCloud Drive with Advanced Data Protection — Apple ecosystem, E2E for Drive, Photos, Notes, Backup.
- Self-hosted — Nextcloud, Seafile, or OwnCloud on a VPS or home NAS. Maximum privacy, maximum maintenance burden.
See our encrypted file storage piece for a deeper comparison of Proton Drive vs Tresorit vs Sync.com.