Documentation Agency might be a bit more popular than PDFCrowd. We know about 1 link to it since March 2021 and only 1 link to PDFCrowd. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
To follow on with this, I've used https://pdfcrowd.com/ too. Source: over 3 years ago
This is too biased for me IMHO. I do agree with some points, documentation IS amazing, and you are very likely under-documenting things. But documentation is not cheap to create, and specially it's not cheap to maintain. I've worked in multiple companies where the problem was too much documentation, and of course everyone was afraid to update or ghasps remove any piece of old documentation in case it... - Source: Hacker News / about 1 year ago
pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Docusaurus - Easy to maintain open source documentation websites
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
Devhints - TL;DR for developer documentation
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.