Both US and international sales tax, after configuration, just work. I don't have to think about it any more. Exactly what I wanted!

E2E automation across registration, calculation and filing for the US and rest of world – true global coverage we haven't seen in any other platform. What stood out for us: we sit on both sides of Sphere: we integrate with them as a platform and we run our own tax compliance on them. That dual vantage point means we've scrutinised them more closely than most, and their international functionality is in a different league; the local rails and TRAM-powered coverage handle jurisdictions other vendors simply can't reach.

April is a tax company, so we know what good looks like in this space. Sphere handles registration, calculation, and filing end to end, which we didn't find anywhere else. The other thing that stands out is how fast their engineering team moves. Integration gaps that stalled us with our previous vendor got resolved quickly here, sometimes within days.