Know any cheap, simple, product walkthrough SaaS?

I've been looking for a cheap, SaaS product that can provide in app walkthroughs for my product. (think step-by-step product tours)

Doing some initial research I see most of them I can find (Appcues, Intercom, Apty) are targeted more towards bigger/enterprisey plans with pretty hefty price tags that often require a demo first.

I could go and build something myself but figure it's likely worth my time just to buy someone else's.

(Note: I'm not thinking about video recordings or screen grabs, more the highlighting sections of the app and stepping you through what each thing does)

Anyone know of any?