so if i understand the OP question, what solutions are compatible with Webroot SA?
first you have to understand that WSA is designed to be the perfect companion AV, you can set up it to your very needs.
1- All firewall, WSA "firewall" is not a true firewall, just a outbound connections monitor.
2- Any AVs, WSA is compatible with all AVs,
3- Any HIPS or Behavior Blocker or Web Filter, each WSA's components can be disabled