Two reports, two different pictures of the same car, and dealers who run at volume usually need both. What each one is actually better at — and how to pull them without a person doing it VIN by VIN.
AutoCheck and Carfax both sell vehicle history reports, and they do not always agree, because they pull from overlapping but different sources. A record that appears on one can be missing from the other. That is not a bug — it is why dealers who run at any volume tend to check both rather than trusting either alone.
They also frame the same information differently, and each has a genuine strength.
AutoCheck is owned by Experian and is the report built into the auction world — it is what you see inside Manheim and ADESA. Two things stand out:
Carfax has the stronger consumer brand and, often, deeper service-record and dealer-maintenance history — the routine dealer and shop records that tell you a car was actually looked after. Buyers know the name and ask for it, so a clean Carfax also carries retail weight that a clean AutoCheck does not, simply because the public recognises it.
For most dealers it is not "which one" — it is AutoCheck to buy, Carfax to sell. AutoCheck (usually already in the auction platform) to screen and appraise at acquisition; Carfax to reassure the retail buyer and back your listing. At volume, cross-checking both catches records one missed, and a discrepancy between them is itself a signal worth a closer look.
Whichever you rely on, remember what neither replaces: a history report tells you what happened to the car, not what the car is. For the exact spec you still decode the VIN — the [free NHTSA vPIC decoder](/blog/free-vin-decoder-nhtsa-api) gives you the factory build — and for what it is worth you still price it against the [live market and MMR](/blog/what-is-mmr-manheim-market-report). History, spec and value are three separate questions.
Both reports live behind your paid subscription, and both are built for pulling one VIN at a time. That is fine for a single car. It falls apart across a whole acquisition run or a full lot, where someone ends up copy-pasting VINs into a portal for an hour and then hand-copying the flags into a spreadsheet — slow, and easy to fumble on the fiftieth car.
Run on your own AutoCheck and/or Carfax subscription — the account you already pay for — a pipeline can:
An hour of copy-paste becomes a batch that runs while you do something else, and the output is consistent instead of depending on who ran it. It reads exactly what you would read in the portal — it just does it to the whole list. This is the core of the [vehicle-history-reports service](/services/vehicle-history-reports), and it drops straight into the [dealer inventory and merchandising](/services/dealer-inventory-scraping) flow.
This only works on credentials you own and are entitled to use. History data is licensed, and automating access you pay for is a different thing entirely from scraping someone else's account or reselling report data — which the providers' terms forbid and which I will not build. The point is to save your team the manual clicking on data you already have the right to pull, nothing more.
Contact me at sam@autosmartcode.com. Tell me which report you subscribe to and where your VINs come from, and I will scope a batch puller for you — usually a two-to-three-day build.