Flexkit is a powerful build-anything-you-want HTML API for payments, e-commerce, user authentication and customer management. It's like using Stripe, but without the need to write any code... or have a server... or have a database.
Flexkit can turn your pages, even static HTML mockups, into full-fledged billing & membership systems JUST using HTML.
Super simple to use, especially w/ no or low-code site builders like webflow,.Cons:
None that I can find so far.
I'm currently using this for my airbnb/medium-like content site, working with an engineer to setup things like bookmarking, wishlists, etc.Emmanuel Kaska has used this product for one week.