Proton Drive vs OneDrive: Privacy Comparison
This in-depth comparison weighs Proton Drive against OneDrive along six decisive privacy dimensions: how data is collected, how encryption is implemented, how data is shared with third parties, what privacy controls users get, how transparent each service is, and what their historical track record looks like. The two cover much the same ground, yet they handle user privacy in very different ways. What our review shows is that Proton Drive delivers a clearly stronger privacy experience on balance, even though each option has its own relative pluses and minuses that are worth examining closely.
Where the Scorecard Lands
Before the dimension-by-dimension breakdown, here is the summary our scoring produced. Across the six privacy dimensions we score, Proton Drive finishes ahead of OneDrive, 43/60 to 37/60. That total reflects a privacy comparison in which one service is consistently the more privacy-respecting choice, even though both cover the same functional ground.
The largest single-dimension gap is in Data Collection, where Proton Drive leads by 1 point -- Proton Drive 8/10 to OneDrive 7/10. The tightest race is Data Collection, separated by just 1 point (Proton Drive 8/10, OneDrive 7/10). The sections below explain how each score was reached.
How Each Service Collects Data
Every privacy assessment starts with data collection. How much a service gathers, stores, and processes about its users is what ultimately drives the privacy risk of using it. Proton Drive takes a leaner approach here, capturing only the data strictly required to make the service work. Its rival pulls in a wider net of information -- behavioral patterns, device identifiers, and usage analytics that go well past what the core features actually need. Our marks were Proton Drive 8/10 and OneDrive 7/10 in this area. What separates them is not merely how much is gathered but why it is gathered and whether it is truly needed.
Encryption Standards
Encryption protects user data both in transit and at rest, and the implementation quality varies dramatically between services. Proton Drive implements stronger encryption measures, including more robust protocols for data in transit and better protection for stored data. The specific encryption implementations differ in their coverage (which data is encrypted), their strength (which algorithms and key lengths are used), and whether end-to-end encryption is employed (preventing even the service provider from accessing user content). Proton Drive scored 9/10 while OneDrive scored 8/10 for encryption.
Third-Party Data Sharing
A service's willingness to hand data to outside parties is a make-or-break privacy factor. That covers advertising networks, analytics providers, business partners, and what happens when governments come asking. Proton Drive keeps a tighter lid on who can reach user data. These sharing habits shape security as much as privacy, since every extra party granted access becomes one more way a breach could happen. Scores: Proton Drive 5/10, OneDrive 4/10.
What You Can Manage Yourself
The availability and effectiveness of user-facing privacy controls determine how much agency individuals have over their own data. This includes settings for data collection opt-out, download and deletion capabilities, granular permission controls, and the ease with which users can exercise their rights under applicable privacy regulations. Proton Drive provides more comprehensive and accessible privacy controls. Scores: Proton Drive 6/10, OneDrive 5/10.
Transparency
Transparency encompasses how clearly each service communicates its data practices. This includes the readability of privacy policies, the publication of transparency reports, responsiveness to privacy inquiries, and proactive communication about policy changes. Proton Drive demonstrates stronger transparency overall. Clear, accessible privacy communication is essential for informed consent and trust. Scores: Proton Drive 7/10, OneDrive 6/10.
Track Record Over Time
A service's history of privacy incidents, regulatory actions, and responses to vulnerabilities provides important context. Proton Drive has a stronger historical record on privacy, with fewer incidents and more responsible handling of the issues that have arisen. Past behavior is often the best predictor of future privacy practices. Scores: Proton Drive 8/10, OneDrive 7/10.
Overall Verdict
Our comprehensive analysis gives Proton Drive a total score of 43/60 and OneDrive a total score of 37/60. The overall winner for privacy is Proton Drive. While both services serve similar functional needs, the winner demonstrates a more privacy-respecting approach across the dimensions that matter most. That said, no service is perfect, and users should always configure privacy settings actively regardless of which option they choose. We recommend supplementing your choice with additional privacy tools, a VPN, DNS-level ad blocker, and privacy-focused browser, to build a comprehensive privacy posture. If your threat model requires the strongest possible privacy, consider whether an even more privacy-focused alternative exists in this category beyond the two compared here.