One price: $300 a month plus 5 percent of token cost, for the whole company. No seats, no tiers, no per-user math.
Heidi is priced for the whole company, not per chair. $300 a month plus 5 percent of the tokens she actually uses. One ledger shows what Heidi did and what it was worth, so you always know what you are paying for and why.
There is no dedicated-engineer upsell and no enterprise tier with hidden features. Support happens through Heidi herself.