Clear Containers vs ZeroVM: What are the differences?

Developers describe Clear Containers as "Use the isolation of virtual-machine technology along with the deployment benefits of containers". We set out to build Clear Containers by leveraging the isolation of virtual-machine technology along with the deployment benefits of containers. As part of this, we let go of the "generic PC hardware" notion traditionally associated with virtual machines; we're not going to pretend to be a standard PC that is compatible with just about any OS on the planet. On the other hand, ZeroVM is detailed as "Open-source lightweight virtualization platform". ZeroVM is an open source virtualization technology that is based on the Chromium Native Client (NaCl) project. ZeroVM creates a secure and isolated execution environment which can run a single thread or application. ZeroVM is designed to be lightweight, portable, and can easily be embedded inside of existing storage systems.

Clear Containers and ZeroVM can be primarily classified as "Virtual Machine Platforms & Containers" tools.

Clear Containers and ZeroVM are both open source tools. It seems that ZeroVM with 738 GitHub stars and 71 forks on GitHub has more adoption than Clear Containers with 421 GitHub stars and 57 GitHub forks.