Thanks for your post! We have many customers using TestRail with Jenkins and other continuous integration tools. There are even third-party plugins specifically for Jenkins (e.g. https://github.com/jenkinsci/testrail-plugin). That said, we would highly recommend simply using TestRail’s API to integrate your automated tests directly with TestRail:
This is the easiest and most robust approach. When your automated tests are then triggered by Jenkins or any other way, the results would be submitted to TestRail. This is generally much more flexible than using a specific Jenkins plugin. So we recommend simply integrating TestRail’s API directly with your automated test scripts.
Hope this helps!