PDFCrowd might be a bit more popular than DocSecrets for G Suite. We know about 1 link to it since March 2021 and only 1 link to DocSecrets for G Suite. 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.
It's a tad bit outdated: https://workspace.google.com/marketplace/app/docsecrets/933719089841. Source: about 2 years ago
To follow on with this, I've used https://pdfcrowd.com/ too. Source: about 3 years ago
DocuSign - Try DocuSign's interactive signing demo now! Send yourself an electronic document to digitally sign using our e-signature service.
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
GTasks for G Suite - Lets you to manage your Google Tasks from Docs allowing you to tackle your to-do list.
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.
Lumin PDF for G Suite - Open, edit and share PDF and Office files in your browser.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request