The firmware of the ZERO will be gradually open sourced except the secure element and secure operating system.
We strongly believe in the power of open source. We understand the benefits it brings in terms of transparency, collaboration, and community-driven security. However, we also acknowledge that open source alone is not sufficient to achieve maximum security. It is just one piece of the puzzle, and we must carefully consider various elements to create a truly safe solution.
The security principle of having many eyes checking our code only holds if there are many people looking at our code and reporting issues.
Unless we have a large and active user base, there is a significant risk that zero day vulnerabilities do not get disclosed. For this reason, we decided to gradually open source our device.
To understand our reasoning, please read our blog post: The vision of open source from our CTO