GrapheneOS and CalyxOS are both well-known mobile operating systems that emphasize security and privacy by implementing measures and features that stock Android lacks. However, each OS has a unique approach to protecting customers’ privacy, as well as specific benefits and drawbacks that shape the user experience.
This GrapheneOS vs. CalyxOS guide compares the key features, such as security, privacy, and usability, of both options. We’ll also introduce you to a complementary solution that helps overcome the issues of both OSs.
What Is GrapheneOS?
GrapheneOS is a security- and privacy-focused mobile operating system compatible with Google Pixel devices. It offers more advanced protections than standard Android and is specifically designed for security enthusiasts and tech experts.
The OS was developed as a non-profit open-source project in 2014, and its primary focus is on developing and providing security-first technology that improves system hardening features, such as:
- Exploit mitigations
- Sandboxing
- Permission models
Due to the improvements made to both the OS and the apps it runs, GrapheneOS reduces the chance of attackers exploiting whole classes of common vulnerabilities and attack surfaces.
What Is CalyxOS?
Heads up: CalyxOS is currently on hiatus.
On August 1, 2025, the Calyx Institute paused CalyxOS releases following a leadership transition and announced plans to overhaul the project's signing infrastructure. A final maintenance OTA was released on August 5, 2025, with notice that users would not receive further security patches until the transition was complete.
As of May 2026, stable releases had not yet resumed, although the team published its first community Android 16 test builds on May 4, 2026. These builds are intended for testing and are not recommended for daily use. For the latest project status, check calyxos.org.
The rest of this article describes CalyxOS's design and historical strengths; treat installation and migration decisions in light of the current status.
CalyxOS is a mobile operating system that prioritizes privacy and security and is compatible with Android phones like Motorola, Pixel, and Fairphone.
It was founded in 2020 and is designed to meet the privacy and security needs of lawyers, journalists, and social activist groups. Still, thanks to its user-friendly interface, it can be used by anyone who wants to improve mobile security.
CalyxOS’s core principle is “Privacy by Design,” which means it allows customers complete control over their personal data. It reduces the risk of security and privacy threats, such as:
- Surveillance
- Censorship
- Ransomware
- Repressive governments
CalyxOS vs. GrapheneOS Comparison: At a Glance
Before we compare the features of CalyxOS and GrapheneOS, here is a quick breakdown of their key differences:
If You're Currently Running CalyxOS: Your Migration Options
If you’re currently running CalyxOS, here are the main migration options to consider based on the device you’re using:
- If you're using a supported Pixel (Pixel 6 through Pixel 10): GrapheneOS is the closest alternative, offering stronger hardening, comparable de-Googled UX, and more frequent security patches
- If you're on a Fairphone or Motorola: /e/OS by Murena is a practical replacement option, currently supporting 250+ devices, and the /e/OS 3.7 shipping AOSP 16
- In either case, back up first using Seedvault, the same backup tool CalyxOS already uses, to make the move smooth
If CalyxOS resumes stable releases in the future, you can revisit your options and decide whether switching back makes sense for your needs.
CalyxOS vs. GrapheneOS: 5 Key Differences
This CalyxOS vs. GrapheneOS comparison highlights how CalyxOS and GrapheneOS differ in five main areas:
- Privacy features
- Security measures
- Usability and user experience
- App compatibility
- Reliability
1. Privacy Features
GrapheneOS offers high-security privacy features aimed at tech experts, whereas CalyxOS includes user-friendly privacy tools and settings that don’t require extensive knowledge and are suitable for everyday use.
GrapheneOS provides privacy by default through a hardened security and privacy architecture. It doesn’t use any Google apps or services, minimizing data exposure to third parties. Instead, it allows customers to run Android apps through the Aurora Store or its sandboxed Google Play—a privacy-first replacement of Google’s default service.
For instance, while Google Play generally has access to your private information, such as your location and background data, the sandboxed feature automatically disables tailored keyboard suggestions based on input data and hides passwords during entry.
Additionally, GrapheneOS includes strict permission controls and uses its own secure servers instead of Google servers to perform:
- Attestation key provisioning
- Connectivity checks
- Secure User Plane Location (SUPL)
Meanwhile, CalyxOS’s approach to privacy settings is centered around customers’ needs. Here’s an overview:
2. Security Measures
Both GrapheneOS and CalyxOS provide advanced security features, including:
- Sandboxing to isolate apps and enhance privacy
- Encryption to safeguard data from unauthorized access
- Proactive security updates and patches for emerging threats
- Anti-tracking and ad-blocking features to reduce data exposure to third-party entities
- Verified boot to ensure the code is run from a trusted source (prevents tampering)
Additionally, CalyxOS and GrapheneOS both use the SeedVault app, which leverages end-to-end encryption to back up your device through the cloud or USB storage. However, due to the app’s limited default backup settings and the need for manual configuration, the GrapheneOS team plans to replace it with a new, more robust measure.
As for the differences in their security features, GrapheneOS doesn’t offer many built-in anonymity tools. CalyxOS, however, specializes in anonymity and includes a free built-in VPN service that protects your network traffic and IP addresses, as well as Tor Browser for anonymous browsing.
Instead of anonymity, GrapheneOS focuses on advanced security hardening, reducing the system’s vulnerabilities and attack surface. To do so, it strengthens the system’s kernel components and uses security policies like:
- SELinux policy: Denies unauthorized access to files, directories, and network ports
- Seccomp-bpf policy: Restricts the system calls that a process can make
3. Usability and User Experience
CalyxOS prides itself on its user-friendly interface, easy-to-use settings, and pre-installed privacy apps, such as Signal and Tor Browsing. This makes CalyxOS suitable for anyone looking for a secure yet convenient solution.
Setting up this OS is straightforward, and while it includes pre-installed apps, you will need to install additional ones after setup. Instead of using the official Google Play, CalyxOS includes microG, an open-source replacement that enables limited integration with Google services without compromising user privacy.
The OS is generally easy to navigate, although SIM activation settings may take longer to find.
Meanwhile, GrapheneOS is known for its bloatware-free, minimalist approach. That said, its installation and setup require more technical knowledge since both processes differ from those of stock Android.
Unlike CalyxOS, which balances privacy and usability, GrapheneOS prioritizes security. It doesn’t use microG to provide access to Google Play Services. This was a major drawback of GrapheneOS before its team released sandboxed Google Play services in 2024 to improve the system’s app compatibility issues.
4. App Compatibility
As mentioned above, both operating systems include replacements for Google Play that don’t track user behavior—GrapheneOS uses sandboxed Google Play Services, and CalyxOS leverages microG.
The two services differ in their approach to Google compatibility:
- MicroG is an open-source replacement for Google Play services. It recreates the original software’s functionality but uses a new code base to improve security and privacy.
- Sandboxed Google Play Services runs Google Play services as a standard Android sandboxed app. It requires explicit permission requests to ensure privacy.
Here is how sandboxed Google Play and MicroG compare across several key aspects:
Still, while GrapheneOS provides greater app compatibility and privacy, it may not work properly with certain banking apps that rely on SafetyNet or Play Integrity checks. Its high-security system doesn’t support these security checks due to their reliance on the Google ecosystem.
5. Reliability
Both operating systems are reliable and excel when it comes to performance.
GrapheneOS prioritizes security and performance optimization with minimal background processes. It minimizes attack surfaces, safeguards user data, and receives regular updates and security patches, making it a reliable choice for privacy-first users.
Still, Graphene’s privacy and security features require trade-offs in data management and app usage, such as limited access to banking apps, which can be a dealbreaker for some users.
Meanwhile, CalyxOS balances high-performance with additional features that can consume more resources. Although the OS is generally reliable and secure, it experiences security update delays and app compatibility issues as it heavily relies on microG.
GrapheneOS vs. CalyxOS Comparison: What’s Better?
Both OSs take a unique approach to implementing security measures, but the choice today is straightforward for one practical reason: as discussed above, CalyxOS has been on hiatus since August 2025 with no stable release as of May 2026. Its design philosophy, a user-friendly, accessible privacy OS aimed at journalists, activists, and privacy-conscious everyday users, remains worth understanding, but it is not currently a practical choice for new installations.
GrapheneOS, on the other hand, continues to provide strong security and privacy measures. It supports Pixel 6 through Pixel 10 in production and may come with a steeper learning curve. It's particularly well-suited to Pixel users seeking a solution that:
- Doesn't rely on Google services
- Includes advanced system hardening
- Implements strict permission controls
Note that GrapheneOS's Pixel-only constraint may also be temporary. In March 2026, Motorola and the GrapheneOS Foundation announced a long-term partnership to bring GrapheneOS to future Motorola flagships, with the first compatible devices expected in 2027. For now, however, the practical shortlist remains GrapheneOS on a supported Pixel device.
Unfortunately, while both CalyxOS and GrapheneOS offer extensive device-level security, they cannot protect you from network-level threats. The clearest recent example came in late 2024, when the FBI and CISA confirmed that the China-linked Salt Typhoon campaign had compromised AT&T, Verizon, T-Mobile, and Lumen. The intrusion exposed customer call records, intercepted calls and texts of targeted individuals, and reached the systems carriers use to fulfill court-authorized wiretaps.
None of that can be prevented by hardening the operating system on your device. Threats like SIM swaps, SS7 attacks, and carrier-side surveillance live below the OS, where the carrier—not Google, not the GrapheneOS Foundation, not the Calyx Institute—is the only thing standing between you and the attacker.
Cape: The Carrier Built for Security and Privacy
Cape is a privacy-first mobile carrier designed to keep your communications safe from surveillance and misuse. Unlike traditional cell phone plan providers, our business model centers around providing you with premium and secure call, text, and data, rather than harvesting and selling your information.
Our service is built from the ground up with privacy and security at its core, offering unique features like:
Privacy & Security Feature | Description |
Cape doesn’t ask for your name, address, or Social Security number. We only collect the information necessary to provide service, and we retain that information for the minimum amount of time possible. | |
Traditional carriers rely on a fixed International Mobile Subscriber ID (IMSI) to connect your device to cellular networks. This is a vulnerability that lets carriers, advertisers, and bad actors identify and track your device. Cape lets subscribers automatically rotate their IMSI every 24 hours, making it infinitely more difficult to track you or your device. | |
Many services ask for your phone number, but sharing it exposes you to spam, scammers, data brokers, and a variety of other risks. VoIPs, on the other hand, don’t work with 2FA, cost extra, and aren’t encrypted. With Cape, you get two free additional SMS/MMS lines that are middle-to-end encrypted. | |
Most U.S. carriers store your call and text metadata for years, sometimes indefinitely. Cape is built to forget, so call data records (CDRs) are deleted after just 24 hours. | |
Cape nullifies the threat of SIM swapping by completely removing humans from the loop. During signup, you receive a 24-word phrase that generates a private key tied to your number. This effectively means that no one (but you) can move your number to a new carrier or device, not even Cape. | |
Legacy network protocols, like SS7, leave you vulnerable to hackers that can track your location, intercept your calls and texts, and steal sensitive information. Cape’s Network Lock relies on a proprietary signaling proxy to verify that your device’s physical location matches the network it’s trying to attach to. If we detect anything out of the ordinary, Cape automatically blocks the connection, nullifying the potential threat. | |
Traditional voicemail systems are outdated, unencrypted, and another security hole bad actors can exploit to gain access to your sensitive information. Cape encrypts all voicemails, ensuring only you can access them. | |
While roaming, your phone connects to local telecom providers to enable service. But, who knows who might be listening on the other end. Cape provides you with peace of mind by routing your traffic through our U.S.-based mobile core, ensuring your identity, data, and communications remain private and secure. |
Ditch Legacy Carriers: Get Cape Today
Cape is a “Heavy” Mobile Virtual Network Operator (MVNO), meaning we own our mobile core and provision our own SIMs. This gives us full control over how accounts are authenticated and what data is collected (and for how long), and is how we are able to provide privacy and security features no other carrier on the market can offer.
Get started with Cape today and enjoy the peace of mind, knowing you are fully protected against scammers, hackers, bad actors, and other mobile threats.
To help protect more than just your phone, we’ve partnered with Proton. As a new Cape subscriber, you can choose between Proton Unlimited and Proton VPN Plus for just $1 for six months.
Share it
