Pricing can be seen at https://plausible.io/#pricing
6$ / month for a personal website.
12$ / month for a startup.
36$ / month for a business.
6$ / month for a personal website.
12$ / month for a startup.
36$ / month for a business.
There's no ad revenue to support this business — the website owner is the customer, not the product. That is a different business model from Google analytics or WordPress free analytics.