TestRigor includes very exciting two ways integration with TestRail. Not only testRigor will set the status of TestRail test cases and move them to run as soon as tests in testRigor are executed, but also you can literally go to TestRail write your English executable specifications in TestRail itself and execute test cases directly from TestRail without even touching testRigor whatsoever.
You create tests in the TestRail, and then they automatically appear in testRigor. And if you match the testRigor language, you already have a test and testRigor that is ready to go.