Sezzle is currently available on Shopify, Magento, WooCommerce, 3dcart, CommentSold, OpenCart, BigCommerce, BuyItLive, Commerce Cloud, and many more! You can view our full list of platforms here.
Sezzle also has a public API for non-platform users. To access our API, merchants do need to still submit an application (which can be done here) so the appropriate API keys can be generated.
We are not compatible with Facebook, GoDaddy, Wix, or Weebly at this time. If you're currently on one of those platforms but wish to offer Sezzle, we recommend looking into some of the platforms that we are compatible with to find one that best suits you!