Is Puppet free?
Puppet's open source edition is completely free. Puppet Enterprise has commercial pricing based on the number of nodes you manage. It's enterprise-grade configuration management.
What is Puppet?
Puppet is an infrastructure as code tool that automates server configuration. You write declarative code describing the desired state, and Puppet ensures your servers match that state.
Puppet vs Ansible?
Puppet uses agents installed on each server and a pull model. Ansible is agentless and uses push over SSH. Ansible is simpler to start with; Puppet is more powerful for complex infrastructure at scale.