Technographic pricing comes in more shapes than any other data type in this directory, because the providers are selling different units. Compare the unit before you compare the number.
BuiltWith is the cleanest to read. A domain lookup through its API is 1 credit, $0.0495 at the entry rate, with a 2,000 credit minimum for an account. The lists, which are what most sales teams buy BuiltWith for, are not sold by the credit at all: the Lists API needs a plan at $295, $495 or $995 a month.
TheirStack runs two currencies, and that is the trap on its page. Company credits come in one-time packs from $109 for 1,000, which is the app's currency; the directory records the API credit. API credits are a separate monthly subscription from $49 for 1,500, about $0.0327 each, and the API bills 3 of them for a company it returns. The two balances buy different things, so check which one a quote is in.
Apollo returns the stack on organization enrichment for 1 credit, and an Apollo credit works out at $0.0196, because Basic grants 30,000 credits a seat a year for $49 a seat a month billed annually. The cheap credit is cheap only if you were buying the seat anyway. Crustdata charges 2 credits for a company record and 2 more when technographics come back, and it does not publish the dollar price of a credit.
The rest price the stack inside something broader. ZoomInfo's self-serve route charges $0.38 a data credit, with search free. Clearbit is now HubSpot data enrichment, included with paid HubSpot seats from Starter and spending no HubSpot Credits, so its price is the seat. Cognism publishes no price at all. Each provider's review carries the full rate card.