Well I’m glad I have none of their bulbs, but I do use a couple ‘Wizmotes’ with Home Assistant. It uses wifi, but it’s a peer-to-peer protocol that I use an ESP to pick up. So I’m fairly sure it can’t phone home at all. They’re really handy and dirt cheap.

(Signify bought Wiz as well, that’s why some Hue stuff says “Wiz connected” on it now)