Starling business accounts do allow cash deposits through the Post Office network but they're chargeable, like cash deposits on any business account I've seen.

Starling business accounts do allow cash deposits through the Post Office network but they're chargeable, like cash deposits on any business account I've seen. Domestic ATM withdrawals are a cost for Starling as they have no network of their own; they're not even part of Link. I'm not sure that the paltry interest they can gain from business deposits will be enough to make those accounts profitable (they just announced another £60m of funding this week). I'm a relatively happy personal customer of Starling, so I'm not against them, but I do think it's a bit optimistic to say Starling's business accounts are profitable based on no evidence.