SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
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
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
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.