Shinken vs Vulcan: What are the differences?

Developers describe Shinken as "Nagios compatible monitoring framework, written in Python". Shinken's main goal is to give users a flexible architecture for their monitoring system that is designed to scale to large environments. Shinken is backwards-compatible with the Nagios configuration standard and plugins. It works on any operating system and architecture that supports Python, which includes Windows, GNU/Linux and FreeBSD. On the other hand, Vulcan is detailed as "DigitalOcean's API-compatible alternative to Prometheus". Vulcan is an API-compatible alternative to Prometheus. It aims to provide a better story for long-term storage, data durability, high cardinality metrics, high availability, and scalability. Vulcan is much more complex to operate, but should integrate with ease to an existing Prometheus environment.

Shinken and Vulcan can be primarily classified as "Monitoring" tools.

Shinken and Vulcan are both open source tools. Shinken with 1.08K GitHub stars and 355 forks on GitHub appears to be more popular than Vulcan with 542 GitHub stars and 32 GitHub forks.