GrapheneOS

GrapheneOS, formerly known as CopperheadOS, is an open-source, security-focused, and Android-based operating system. As of 2025, GrapheneOS only officially supports Google's Pixel product line because it is the only product that meets their security standard.

GrapheneOS

Basic Information
Release Year	2019
Product Type	Operating System
In Production	Constant
Official Website	grapheneos.org

Features

GrapheneOS advertises a multitude of features; most focusing on security. Although a more detailed list of features is provided at their website, a general list includes:

1. 0-Day Exploit Defense
2. Attack surface reduction
3. Hardened USB-C Port and Pogo Pins control
4. Improved Sandboxing
5. Network Permission Toggle
6. Sensors Permission Toggle
7. Storage Scopes
8. Contact Scopes
9. Private Screenshots
10. Pin Scrambling
11. Two-Factor Fingerprint Unlock

and more...

Reception

Positive

German Security Researcher and Pentester Kuketz said that it was the "...gold standard of Android ROMs...".

Cellularnews.com stated "GrapheneOS is arguably the best mobile operating system in terms of privacy and security."

Negative

Louis Rossmann, a consumer rights advocate and influencer, praised the project, but criticized the Lead Developer, Daniel Micay. A conversation between the two accused Rossmann of promoting harassment, slander, and attempted murder of Micay for commenting on a Techlore video stating: "This is informative, and unfortunate." Micay subsequently threatened to ban Rossmann from their Matrix channel, and accused him of being discriminatory of people with autism.