Concourse vs Hercules CI: What are the differences?
Developers describe Concourse as "Pipeline-based CI system written in Go". Concourse's principles reduce the risk of switching to and from Concourse, by encouraging practices that decouple your project from your CI's little details, and keeping all configuration in declarative files that can be checked into version control. On the other hand, Hercules CI is detailed as "Continuous Integration for Nix". Automated hosted infrastructure for Nix, reliable and reproducible tooling, to speed up adoption and lower integration cost.
Concourse and Hercules CI belong to "Continuous Integration" category of the tech stack.
Concourse is an open source tool with 5.07K GitHub stars and 623 GitHub forks. Here's a link to Concourse's open source repository on GitHub.