How to autogenerate SEO reports for possible clients?

There are several SEO agencies that offer for free, obviously in exchange for your email and phone, to instantly generate a quite detailed report for your website, actually like an audit, and send you the PDF report (12-15 pages long). This happens instantly, or well after a minute or so you've entered your email, they send you the link to download the report, so its completely autogenerated with no human input whatsoever

examples:

whats the service they're using to get these autogenerated SEO reports?

its more in depth that you'd imagine for something free, and not bad for an autogenerated report