Ottomatica slim vs Virtuozzo: What are the differences?

Ottomatica slim: Build and run tiny vms from Dockerfiles. It will build a micro-vm from a Dockerfile. It works by building and extracting a rootfs from a Dockerfile, and then merging that filesystem with a small minimal kernel that runs in RAM; Virtuozzo: An operating system-level server virtualization solution. It is an operating system-level server virtualization solution designed to centralize server management and consolidate workloads, which reduces overhead by reducing the number of physical servers required. Organizations use it for server consolidation, disaster recovery, and server workload agility.

Ottomatica slim and Virtuozzo can be categorized as "Virtualization Platform" tools.

Ottomatica slim is an open source tool with 1.74K GitHub stars and 39 GitHub forks. Here's a link to Ottomatica slim's open source repository on GitHub.