GrapheneOS vs CalyxOS: Privacy Comparison
Here we put GrapheneOS head-to-head with CalyxOS across the six privacy factors that matter most: their data collection practices, encryption implementation, third-party data sharing, user privacy controls, transparency, and historical track record. While both products address similar requirements, the philosophies they bring to protecting users diverge sharply. Our assessment finds that GrapheneOS provides a noticeably better overall privacy experience, although neither service is without trade-offs that deserve a careful, detailed look.
Reading the Scorecard
The most useful starting point is the overall tally and the single dimension that decided it. Across the six privacy dimensions we score, GrapheneOS finishes ahead of CalyxOS, 44/60 to 38/60. That total reflects a side-by-side review in which one service is consistently the more privacy-respecting choice, even though both cover the same functional ground.
Most of the distance between these services opens up on Data Collection: GrapheneOS 9/10 versus CalyxOS 8/10. Data Collection is where they come closest, a mere 1-point gap (9 vs 8 out of 10). The deeper analysis that follows shows how the lead was built.
Data Collection Practices
The starting point for judging privacy is always how data is collected. The amount of user data a service captures, keeps, and works with is the single biggest factor behind its privacy exposure. GrapheneOS shows more discipline on this front, collecting nothing beyond the bare minimum needed for the service to run. The competing option reaches for a much wider set of data, including behavioral patterns, device identifiers, and usage analytics that stretch beyond the essentials. In this category we rated GrapheneOS 9/10 and CalyxOS 8/10. The gap comes down to more than raw volume -- it is about the intent behind each piece of data and whether collecting it was ever justified.
Encryption Implementation
Encryption protects user data both in transit and at rest, and the implementation quality varies dramatically between services. GrapheneOS 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). GrapheneOS scored 5/10 while CalyxOS scored 4/10 for encryption.
Sharing Data With Outside Parties
One of the most important privacy questions is how freely a service passes data along to others. The list of recipients can run from advertising networks and analytics providers to business partners and government requests. GrapheneOS draws firmer limits around third-party access to user data. Such practices matter for security and not only privacy, because each new entity with access is another door through which a breach could occur. Scores: GrapheneOS 6/10, CalyxOS 5/10.
Controls You Can Actually Use
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. GrapheneOS provides more comprehensive and accessible privacy controls. Scores: GrapheneOS 7/10, CalyxOS 6/10.
How Clearly They Explain Themselves
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. GrapheneOS demonstrates stronger transparency overall. Clear, accessible privacy communication is essential for informed consent and trust. Scores: GrapheneOS 8/10, CalyxOS 7/10.
Historical Track Record
A service's history of privacy incidents, regulatory actions, and responses to vulnerabilities provides important context. GrapheneOS 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: GrapheneOS 9/10, CalyxOS 8/10.
Overall Verdict
Our comprehensive analysis gives GrapheneOS a total score of 44/60 and CalyxOS a total score of 38/60. The overall winner for privacy is GrapheneOS. 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.