Are they website platforms that allow you to build it out, and sync calendars, and do the pricing based on algorithms (like wheelhouse prices)?

So in a way, it's a consensus value.However, these numbers may not be adjusted for years unless your county uses algorithms that they can apply over entire areas.  

This is against an algorithm that (theoretically) should make no mistakes, set at an immortal level.

You have to be strict, almost like an algorithm.

I am a human algorithm in my specialty areas. 

It takes us a year to learn the market and develop a successful rate structure, then to integrate that into algorithms that we use to adjust pricing on the fly.

They just aggregate it and sell it to you, often adding in algorithms to infer certain characteristics, such as equity % or owner age. 

Only 6 units so far but it's working well enough (but I could also see how managing remotely could be very bad as there are enough headaches managing locally).Interesting note, I think Airbnb's algorithms look for bots/scammers, and I think my behavior of polling a bunch of landlords was identified as spam, so they perma-banned me.

I've been told from an agent the algorithm the site uses for the estimate can be pretty far off..  

Using some sort of algorithm it will notify me when it thinks the perfect time to follow up with a lead based on what they are doing on the site.