Marketplace for expert devs to build and sell interactive courses
Slip (YC S21) is a marketplace that makes it easy to build and sell interactive programming courses. Today, companies either let devs buy books or video based courses that don’t incorporate learning by doing. Slip's founder Kenneth Cassel started the company after he launched an interactive programming course on an obscure topic (learning vim) and made $11k in one month. Students began raving about the how the interactive exercises was a fun and effective way to learn the topic. He realized that developers didn't really understand the value of the learned skills they've obtained, and that building an interactive programming course was too hard. Slip is now helping expert developers monetize their knowledge while leveling up career developers. In the first month since launching, course creators earned over $6500 on the platform, and over 1300 developers signed up to be authors. Slips investors include Y Combinator, John Andrew Entwistle (founder of Coder.com), and Josh Browder (founder of DoNotPay).