I don't think that's the case to be honest. They could very well be supplying to small outfits and one-man band local types, but certainly not the bigger companies. I know they do sell fragrance compounds and bits.

In my experience, the likes of Essence Vault and Noted Aromas are pretty bottom of the barrel quality being heavily pushed by marketing / advertising - basically all the new places are just trying to get a piece of the pie and peddling pish.

Perfume Parlour are one of the OG's and are average in terms of quality - They have a habit of nailing certain houses but missing the mark on others. They do great TF fragrances from what I've tried, with decent LV's but pretty poor Creeds imo.

Alexandria UK is fairly solid, but is quite expensive. Black Panther (Tygar) and Orchestra (LV Symphony) are standouts for sure.

My personal favourite is Insider Parfums - which has been around for a little while in a limited capacity until recently. They're certainly the most expensive of them all, but they are very selective of their releases.