I've worked with Puri.sm and really like their clarity of vision, especially use of Heads and linux-based PureOS.

On Fri, Jul 20, 2018, 12:09 PM Steven Schear <schear.steve@gmail.com> wrote:
For situations where availability of a full-featured OS and popular applications are highly desired, I still like Copperhead OS. Although their development staff has lately been roiled by disagreements, and deletion of the source code signing key by the lead developer, the CEO maintains he will be able to continue the project security assurance.