Is the only way to do this to sign up for a basic plan and then add another user to my account?
I have a particular form that I'm building out, and I want a third party to be able to review the responses to this form (to be able to view and export the data themselves); they would only be able to have access to this form's responses since I have other forms that contain sensitive information. What's the best way to do this?
Yes, Huey. Sharing is only available on the subscription and professional plans. You'd set them up with a subscription / basic plan, then share the right to view responses for that form over to them.