The bottom line
If your goal is to sell a course to the public, Thinkific is the better tool: it has the landing pages, the checkout, the coupons, and the funnel mechanics that a course business runs on. Telescopic has none of that and is not trying to.
If your goal is to train people who already belong to you — employees, customers, partners, members — the requirements invert. You need a catalog, roles, required quizzes that gate progression, learning paths, certifications, and progress you can see across everyone.
Telescopic is that platform, with white-label branding per audience and SCORM and IMS portability so your courseware is never trapped. Many teams keep Thinkific for the public course and run internal training on Telescopic.