3rd party software to support remote workers dialing 911

I have a customer wanting to use a 3rd party to support their remote workers dialing 911 and having their address automatically found using Teams. Dynamic E911 routing is working as expected for their business locations, with a Ribbon SWe Lite in Azure configured to pass along ELIN. I have heard of RedSky, but not a great experience. Has anyone worked with any other companies to support remote Teams users for 911?