Yes, they do, and GrapheneOS is heavily focused on both. The purpose of the project and what it provides is being heavily misrepresented by the comment above.
GrapheneOS treats bypasses of privacy features as security vulnerabilities. It offers substantial privacy advantages of CalyxOS and doesn't come with the privacy drawbacks it introduces. See https://news.ycombinator.com/item?id=28095033 (above) for a more in-depth explanation.
I actually praised you here for pioneering important security features into AOSP :) Please don't view my comments as attacks or Calyx fanboi-ism. I'm not using either and I think you're doing great work. I just wanted to highlight the difference in approach as I saw it as a potential user when I was considering buying a pixel phone.
He's not "the GrapheneOS developer", he's the lead developer and one of many developers. It's a collaborative open-source project which has made a production-grade OS and whose contributions have been upsteamed for AOSP.
GrapheneOS treats bypasses of privacy features as security vulnerabilities. It offers substantial privacy advantages of CalyxOS and doesn't come with the privacy drawbacks it introduces. See https://news.ycombinator.com/item?id=28095033 (above) for a more in-depth explanation.