Zoho Campaigns - Smart email marketing software that helps you reach your target audiences, engage in a personalized way, and grow your brand presence.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
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
Mailjet - All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.
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.