The verdict
If you are testing an idea, or you sell a template or guide now and then, I'd pick Gumroad. There is no monthly bill and no tax paperwork. If you sell courses as a core product, or you sell training to companies, pick Thinkific. For most small B2B teams that is the stronger home, because group orders, invoicing and seat licences for companies buying for a team sit on its higher plans. Check the plan table against your roadmap first. Memberships and live cohorts start on the second plan, and branding removal, B2B sales and API access start on the third.