I created a similar service Kontxt (https://kontxt.io https://kontxt.io) that converts PDFs to websites with Google Doc like shareable controls and inline annot

I created a similar service Kontxt (https://kontxt.io https://kontxt.io) that converts PDFs to websites with Google Doc like shareable controls and inline annotations: highlights, comments (with @mentions & deep-links to page-parts), polls, and auto-scroll navigation.