Fattmerchant - Subscription-based credit card payment processing platform
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
PaymentCloud - PaymentCloud is a feature-rich Credit Card Processing solution that is created to help retailer and e-Commerce businesses to streamline all their payment operations.
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
Helcim - Helcim is a feature-rich online solution that facilitates payment procedures by enabling a range of industries as well as businesses to accommodate several payment options.
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.