Morning Paul,
Here is how I see the main parking providers:
Category 1, of course are the direct Google feed ones, they prefer using the working "Tier-1 companies" only (avoiding the word Google):
- @sedo
 
- ParkingCrew — part of Team Internet (rebranded from CentralNic)
 
- Bodis
 
- Giant Panda that is the newest in this exclusive club, and received their Google AFD feed in Nov 2024.
 
The next category (of their own), of course, are the brand-typo monetizers:
- The London-based Dengi Media are probably the oldest company of this niches in the world
 
- @SitePlug (India-based and belong to the Affinity Group, USA) currently are the most visible one, and Jonathan Dsouza https://www.linkedin.com/in/jonathan-dsouza/ is doing a fantastic job advertising it at all the domain industry events he attends
 
Then next one probably are the multi-feed platforms that use different approaches and adjust to markets, and, at the same time, do not have a direct Google AFD feed. This is heavily dominated by Australian collegues - distant Brits? 
- ParkLogic is now fully owned by Michael Gilmour (Australia)
 
- Above.com that are part of the Trillion Group (also, Australia)
 
- @godaddy CashParking (in-house parking) - maybe James Iles can comment more here on this (they definetelly see their mentions at Acorn)
 
And the last category are the ones that have gone beyond just talking - are doing monetization their own way:
Of course, your own domainui.com that offers parking using Amazon monetization (something else as well?)
@Monte (Monte Cahn) also has recently started mentioning that they offer parking solutions, maybe he or 
@auctionscott Scott Pruitt 
https://www.linkedin.com/in/scott-pruitt/ can comment more on this.
Btw, 
@JamesTuplin has moved from Bodis to Above.com > James, how's the parking scene today and is there any company missing from this list?