PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.

Affirm - Pay at your own pace. When you buy with Affirm, you always know exactly what you’ll owe and when you’ll be done paying.

DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more

Klarna - Klarna provides e-commerce payment solutions for merchants and shoppers.

PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request

Sezzle - Sezzle is a digital payment platform designed to help shoppers manage their financial futures with great ease.