Gmail Mail Merge - Send personalized emails with attachments
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Dynamically Personalized Emails by QGraph - Hyper-personalized emails for E-commerce
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
Dynamic Campaigns by Sigstr - Share the most relevant content in every email
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.