Hi Daniel, Sabrina from the Product Team here - thanks for submitting this request! Unfortunately, we do not currently have this planned. That said, have you looked into using a cloud function to pull your Cornerstone data? Check out the Cornerstone API documentation here. In the meantime, we will continue to collect customer demand to justify the commitment to support & maintain a high-quality Fivetran connector. Every upvote on this request increases the case to build it.

Kindly, 

Sabrina Porter
Product Intern