Snipcart

Snipcart is a lightweight JavaScript library that embeds a shopping cart directly into your site without requiring backend infrastructure or redirecting to a payment page. It works with static site builders like Hugo, Jekyll, Next.js, and custom HTML, handling product inventory, cart management, and payment processing all on the client side.

Best for course creators on JAMstack or static-generated sites who want a modern checkout experience that feels native to their page design. Since there's no redirect flow, customers stay on your site throughout the purchase, which typically converts better than cart abandonment on third-party payment pages.