Loop
Loop is a Mac app that turns any file into your own branded link, and follows every open, page and signature.
Loop gives a file its own page in your brand: your logo, colours and domain. You see who opened it and how long they spent on each page, and readers can mark it up or sign it without a Google account, or any account. It is a Mac app, $49 once, with files in your own Cloudflare account.
Google Drive
Google Drive is a cloud storage and sharing service from Google that sits beside Docs, Sheets and Slides.
You keep files in Drive and share them with named people or with a link, set to Viewer, Commenter or Editor. Links open on Google's own addresses, and many people can edit a Doc together. A Google account includes 15 GB free. Workspace business plans add business email and more storage, from about $7.80 a user a month billed yearly, after a 14-day trial.