Reports are one signal. Always combine them with inspection and a test drive.
What this comparison is about (and what it is not)
CARFAX and AutoCheck are the two dominant US vehicle history report providers. CARFAX is owned by S&P Global (acquired through the IHS Markit merger in 2022), founded 1984, with over 35 years of dealership and service-shop integration history. AutoCheck is owned by Experian (one of the three major credit bureaus), which gives it native access to Experian's wholesale auction and vehicle-valuation data networks. Both are federally NMVTIS-authorized providers — meaning the title-brand, odometer, and total-loss data layers come from the same Department of Justice federal database. The differences are in the proprietary layers each builds on top of NMVTIS: CARFAX's service-record depth, AutoCheck's auction-data depth and proprietary AutoCheck Score. This page compares them honestly so you pick the right tool for your specific car purchase — and tells you when neither is worth the price.
What data each provider actually pulls
Both providers pull federal NMVTIS title-brand and odometer data — the salvage, rebuilt, flood, junk, and lemon-law brands appear identically on both reports because they come from the same federal DOJ database that aggregates all 50 state DMV submissions. Total-loss insurance records flow into NMVTIS the same way. The proprietary differentiators are: CARFAX's direct integrations with tens of thousands of dealer service-management systems (oil changes, scheduled maintenance, recall completions, warranty work that gets reported to CARFAX automatically as dealers process the work orders); and AutoCheck's Experian-owned auction-data feed (Manheim wholesale auction sales, ADESA dealer-to-dealer auction sales, plus better-than-CARFAX IAAI and Copart visibility on certain salvage-auction sales). Recall data is identical on both because both pull from NHTSA's free federal recall database.
When CARFAX wins
(1) Service-record verification — if you are buying a higher-end car where regular maintenance history matters, CARFAX's dealer-network depth surfaces oil changes, brake jobs, transmission services, and recall completions that AutoCheck does not have. (2) Buyback Guarantee — CARFAX offers a limited buyback guarantee on undetected major title brands for qualifying reports. AutoCheck does not. (3) Listing-default — most consumer-facing used-car listings reference CARFAX by name ("Clean CARFAX"), which means apples-to-apples verification with a dealer-provided report requires running a CARFAX. (4) Resale signaling — when you eventually resell the car, a "Clean CARFAX" line in your listing has more market value than "Clean AutoCheck" because buyer brand-awareness skews CARFAX. (5) Bank financing — some auto-loan programs specifically require CARFAX-branded reports for underwriting; check with your lender first if financing.
When AutoCheck wins
(1) Auction-sourced vehicles — if the car may have passed through Copart, IAAI, Manheim, or ADESA, AutoCheck's Experian-owned auction data depth is materially better than CARFAX. The auction listing details — loss type, primary damage location, run/drive status, sale date — show up in AutoCheck more reliably. (2) AutoCheck Score for fast triage — when you're evaluating 5+ cars in a single shopping session, the 1-100 score lets you quickly rule out obviously problem vehicles before doing detailed report reads. (3) Price per report — $29,99 vs $44,99, a meaningful per-VIN saving. For someone checking multiple cars, the savings compound across the shopping session. (4) 25-pack value — the AutoCheck unlimited 25-report pack at $49.99 makes it the dealer's choice for inventory-evaluation work. (5) Fleet/rental/taxi-use flags — AutoCheck tends to surface use-history flags (rental, fleet, taxi, livery) more clearly than CARFAX, which matters for buyers who want to avoid commercially-used cars.
When to run both
Run both CARFAX ($44,99) and AutoCheck ($29,99) when the car you are evaluating meets any of these criteria: (1) purchase price above $15,000, where the dollar value of catching one missed brand or accident vastly exceeds the combined report cost; (2) the vehicle has had three or more owners, which raises the probability that an undocumented accident or title event slipped between owners; (3) the dealer-provided report shows discrepancies with what the dealer claims about the car's history; (4) the vehicle has lived in multiple states (interstate moves are when title washing happens); (5) you suspect rental/fleet use that the seller is denying; (6) you are buying from an out-of-state seller you cannot inspect in person. For everything below those thresholds, running just the provider whose proprietary layer matters for your buying decision (CARFAX for service records, AutoCheck for auctions) is sufficient — or, for the cheapest path that gets the federal NMVTIS layer alone, run our $4,99 NMVTIS-direct report.
What neither provider catches
Both CARFAX and AutoCheck operate on reported data. Three categories of risk are invisible to both: (1) Cash-paid repairs — if an owner had body work or mechanical repair done at a shop that didn't report to either provider's network and paid in cash, the event leaves no data trail. (2) Sub-deductible damage — minor accidents where the owner chose not to file an insurance claim because the repair cost was below their deductible never reach the insurance-data layer that flows into NMVTIS. (3) Pre-NMVTIS or non-participating-state events — NMVTIS only became fully participatory in the mid-2010s, and a few states still have incomplete reporting. For older vehicles, gaps in title-brand history are common. The mitigation for all three: a pre-purchase inspection from a make-specific mechanic (looking for paint overspray, panel-gap asymmetry, fresh undercoating, replaced subframe components, airbag-system fault codes), plus a real-driving test at highway speed. Reports plus inspection plus driving — all three together — is the right buying procedure.
Frequently Asked Questions: Vehicle History Report Comparison
Neither is universally "better" — they each win on different data layers. CARFAX is stronger on dealership service records (35 years of direct integrations with thousands of dealer service-management systems) and brand recognition for consumer listings. AutoCheck is stronger on auction data (Manheim, ADESA, IAAI integrations through parent Experian) and provides the proprietary AutoCheck Score (1-100) that CARFAX has no equivalent of. For a private-sale used car where you want documented maintenance history, CARFAX. For a vehicle that has passed through wholesale auctions or dealer channels, AutoCheck. For a high-stakes ($15k+) purchase, run both. Independent comparisons consistently show only about 60% of incident records overlap between the two — each provider has roughly 20% of records the other lacks.
Yes — both aggregate accident data from state DMV title-change events (where damage was reported as part of title transfer), insurance company total-loss reports flowing into NMVTIS, police accident reports where available, and collision-repair facility submissions. CARFAX presents accidents in narrative form with severity descriptions and odometer context. AutoCheck presents them in a compressed format with structural-damage flags. Neither sees accidents that were not reported anywhere — cash-paid private repairs, sub-deductible incidents the insurance company never recorded, or accidents in jurisdictions that don't share data with NMVTIS. This is why a clean accident history on either report is necessary but not sufficient — an in-person inspection looking for paint overspray, panel-gap misalignment, and fresh undercoating is still required.
The AutoCheck Score is a 1-100 numerical rating that benchmarks a specific VIN against a peer group of similar make/model/year/mileage vehicles. A score of 90+ generally indicates a clean history with no major issues. Scores in the 70-89 range indicate minor reported events that did not change the title status. Scores below 50 typically reflect title brands, severe damage, or accumulated red flags. AutoCheck does not publish the exact scoring algorithm, but the inputs are documented: accident reports, title brands, odometer rollback flags, frame damage, multiple owners, taxi/fleet/rental use, and the peer group benchmark. CARFAX deliberately does not produce an equivalent single score because, per their stated position, a single number obscures the underlying details a buyer should examine themselves. Treat the AutoCheck Score as a fast first-pass signal — but read the underlying incident log before making the buying decision.
Yes, for auction-history visibility. AutoCheck's parent Experian has deep wholesale-auction data partnerships (Manheim, ADESA, plus IAAI feed integration) and AutoCheck reports surface auction sales — including loss type, primary damage area, run/drive status, and sale date — more comprehensively than CARFAX. For salvage-detection on auction-sourced vehicles, this matters: a vehicle that went through Copart or IAAI was almost certainly an insurance total-loss case, and seeing the auction record alongside the title-brand record helps you spot title washing (where the salvage brand from one state gets dropped in re-registration). If you find auction history on AutoCheck that's not on a dealer-provided CARFAX, the dealer's CARFAX may be outdated — pull a fresh one yourself before committing.
Three reasons. First, data-source coverage: CARFAX has direct dealer-service-system integrations AutoCheck does not have, while AutoCheck has Experian-owned auction-feed access CARFAX does not have. Second, timing: each provider updates their database at different intervals, so a recent event reported to one provider's source may not yet appear on the other's report. Third, judgment calls on incident severity: when the same accident event is reported with slightly different metadata to two providers, CARFAX and AutoCheck may classify the severity differently (one shows "minor damage", the other shows "moderate damage"). Independent comparison studies consistently find that around 60% of incidents appear on both reports, ~20% appear on CARFAX only, and ~20% appear on AutoCheck only. For high-value purchases this is why running both is recommended.
CARFAX retail is $44,99 per single VIN, with multi-pack discounts to roughly $26.66/report on the 3-pack and $20/report on the 5-pack. AutoCheck retail is $29,99 per single VIN, with a 25-report unlimited package at $49.99 that drops the per-report cost to about $2 if you fully use it. Bumper sells a $1 trial that auto-renews to $24.99/month. EpicVIN sells single reports at $19.99. NMVTIS-direct providers (our service included) sell single reports at $4,99-$9.99 — same federal title-brand data, lower price because there's no national-brand-marketing markup. For a single-car purchase decision, the right question is "which data layer does my decision depend on" — if it depends on dealership service records, buy CARFAX; if it depends on auction history, buy AutoCheck; if it depends on federal NMVTIS data (title brand, odometer, total-loss flags), buy the $4,99 NMVTIS-direct report.
Both CARFAX and AutoCheck deliver instantly — within seconds of payment confirmation, the report renders in your browser and a PDF copy becomes available for download. The data is pulled in real time from each provider's database. Our $4,99 NMVTIS-direct report delivers in the same instant model. The instant-delivery model also means you can run the report on a dealer's lot directly from your phone — useful when a dealer hands you a CARFAX dated weeks ago and you want to verify nothing has changed since. Pull a fresh report yourself, on the same VIN, dated today, and confirm the federal title-brand data matches.
No. Even running both CARFAX and AutoCheck plus a third NMVTIS-direct provider will not surface accidents that were never reported anywhere — cash-paid repairs, sub-deductible incidents the insurance never logged, accidents in jurisdictions that don't report into NMVTIS, or odometer rollbacks that occurred before the modern reporting era. Vehicle history reports are a necessary risk-reducer, not a guarantee. The right buying process is: (1) Pull a fresh NMVTIS-sourced report for federal data, (2) Add the provider with the layer that matters most for your purchase (CARFAX for service records, AutoCheck for auctions), (3) Get an independent pre-purchase inspection from a mechanic who knows the make, (4) Drive the car at highway speed on a road you know — alignment drift and braking pull surface in driving that no report will tell you about.
A valid VIN is exactly 17 alphanumeric characters, no I, O, or Q (because they look like 1 and 0). If your VIN check fails, first verify the character count and that no letters in the VIN are actually I/O/Q (these never appear in real VINs). If you're typing it from a windshield or dashboard plate, the small font can make G look like 6, S look like 5, B look like 8. Cross-check the VIN against the registration document, title, or insurance card. If you're transcribing from a US-built vehicle, the 10th character is always the model-year code (see our VIN year-code guide). Older vehicles (pre-1981) used shorter VINs that some report providers cannot decode.
No. We are an independent NMVTIS-authorized vehicle history report provider, listed on the official US Department of Justice NMVTIS provider directory alongside CARFAX, AutoCheck, Bumper, EpicVIN, VinAudit, and others. CARFAX is a registered trademark of S&P Global Inc. AutoCheck is a registered trademark of Experian Information Solutions, Inc. We are not affiliated with, endorsed by, or sponsored by either company. We mention them on this page because we are honest about which provider's proprietary data layer (CARFAX's dealership service records, AutoCheck's auction-history depth) is genuinely worth paying for in specific buying scenarios — and which scenarios the federal NMVTIS data layer alone is sufficient for, in which case our $4,99 report does the job.
How we verified this
This CARFAX vs AutoCheck comparison is built from each provider's federal NMVTIS authorization status (verified against the US Department of Justice provider directory), publicly disclosed retail pricing on each provider's consumer checkout flow, S&P Global and Experian corporate-ownership documentation, and independent comparison studies on report-overlap rates between the two providers' proprietary data layers. We update the page when either provider changes pricing, terms, or data scope.
Trademark notice:
VINInfoHub is not affiliated with, endorsed by, or sponsored by CARFAX, AutoCheck, Experian, Copart, IAAI, or Manheim.
Trademarks belong to their respective owners.
Carfax is a registered trademark of S&P Global Inc. AutoCheck is a registered trademark of Experian Information Solutions, Inc. VINInfoHub is an independent third‑party aggregator and is not affiliated with, endorsed by, or sponsored by Carfax, AutoCheck, S&P Global Inc., Experian Information Solutions, Inc., or any vehicle history report provider. We provide access to publicly available vehicle history data. All trademarks are property of their respective owners and are used here solely for factual comparison purposes.