What do VA's use to keep track of you?

I know about VAFS, I was wondering if there was any others? I found a VA I kinda like(haven't signed up) and was looking for some stats on them, but I cant find them on VAFS.
Thanks
Thanks
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=53&t=164898