Sorenson VRS
US video relay, for signers who want dedicated hardware. Sorenson connects you with an ASL interpreter for phone calls at no cost, paid from a federally administered fund, once you are eligible and registered in the FCC's user database. Where it differs is the range of ways in: mobile and desktop apps for calls on the go or at work and school, and the Lumina VP, a videophone Sorenson builds as Deaf-centric hardware for the home.
That makes it a sensible choice for a household that wants one fixed signing station everyone can use. Compare interpreter quality and app reliability against Convo before settling, since both cost the user nothing.
More about Sorenson VRS