We don't currently have a direct integration with GetResponse, however you can customize your own integration using Zapier!
Zapier is a tool that allows you to connect applications without a built in integration together or expand the possibilities of your existing integrations! For example, you can create a new GetResponse contact based on a student enrolling into your Thinkific course.
Learn more about our Zapier integration here and how to set up an email integration here Zapier: Segment New Students to a Course Specific Email Marketing List