AI Hallucination Detection

Know the moment AI gets your brand wrong — before a customer does

ChatGPT, Claude, Gemini, Perplexity, Grok and Google AI Overview answer questions about your pricing, features and certifications directly — often without visiting your site. Indexly checks every claim against facts you've approved, and flags what's wrong.

Checking claims against your facts onGrok
ChatGPT said this about youFlagged

“Indexly requires a credit card to start the free trial.”

IncorrectSeverity 7894% confident
Why: Approved fact: 14-day free trial, no card required.
Perplexity
Outdated
GrokGrok
Misattributed
Gemini
Correct
Indexly userIndexly userIndexly user

Brands catching what AI gets wrong about them, before customers do

CallHubAbundlyOlera CareRankingCo

Why mention tracking isn't enough

Mention tracking tells you AI is talking about you. It doesn't tell you if it's lying.

AI engines increasingly answer questions about brands directly — pricing, features, certifications, integrations — often without visiting the site. Sometimes they're right. Sometimes they're outdated, wrong, or pin a competitor's fact on you. Until now, brands had no way to know which.

Generic AI visibility tools Indexly Hallucination Detection
What it tracksWhether your brand is mentioned or citedWhether what AI said about you is true
What you getA count of mentions, sentiment and share-of-voiceA verdict per claim — Correct, Incorrect, Outdated, Misattributed, Unverifiable
Ground truth usedNone — assumes the AI's framing is accurateYour own approved, human-verified Brand Truth Graph
What it catchesThat AI is talking about you at allA wrong price, a lapsed certification, a misattributed feature

Brand Truth Graph

Approve your ground truth once — Indexly checks every claim against it

Pricing, dates, capabilities, certifications: you approve the facts, not a model. Approving 100+ facts takes under 15 minutes, and human-verified ground truth is what makes an accusation against ChatGPT or Gemini credible in the first place.

  • Approve pricing, dates, capabilities and certifications as ground-truth facts
  • Human-verified — not another LLM guessing what's true about you
  • Approve 100+ facts in under 15 minutes
  • Add new facts anytime as your product changes
Brand Truth Graph118 facts approved
  • Growth plan price
    $99/mo
  • Free trial
    14 days, no card
  • Certification
    SOC 2 Type II
  • Founded
    2024
  • CMS integrations
    WordPress, Ghost, Webflow
Approved in 12 minutes

Continuous Claim Extraction

Every AI answer that mentions you gets fact-checked, automatically

Indexly scans real ChatGPT, Claude, Gemini, Perplexity, Grok and AI Overview responses captured through its prompt monitoring — the actual answers real prompts return — and pulls out every factual claim made about your brand.

  • Scans real responses that mention your brand — not synthetic test prompts
  • Extracts every claim: pricing, features, certifications, integrations, dates
  • Runs continuously — no manual audits to schedule
  • All six engines covered in parallel
Perplexity responsecaptured today

“Indexly is an AI visibility platform. It starts at $49/month, and the free trial requires a credit card. It also includes built-in Reddit ad management.”

Extracted claims

  • Pricing: “$49/month”
  • Trial: “requires a credit card”
  • Feature: “built-in Reddit ad management”

Verdicts, Severity & Confidence

A verdict, a severity score and plain-English reasoning for every claim

Not every wrong claim deserves the same urgency. A wrong price beats a wrong founding year. Every flagged claim gets a 0–100 severity score, a confidence score, and reasoning you can read in seconds — not a raw diff you have to interpret yourself.

  • Correct claims surface too — see the wins, not just the misses
  • 0–100 severity score to triage what actually matters
  • Confidence score plus plain-English reasoning for every verdict
  • Sortable by engine, verdict or severity
Recent claimsSorted by severity
EngineVerdict
ChatGPT
Incorrect
Perplexity
Outdated
GrokGrok
Misattributed
Gemini
Correct

The five verdicts

Every claim lands in exactly one bucket

Correct

AI got it right. Surfaced too — not just the misses.

Incorrect

AI stated something false about your brand.

Outdated

Was true once — no longer current.

Misattributed

A competitor's fact pinned on you, or yours on them.

Unverifiable

No approved fact exists yet to judge this claim.

Root-cause tracing

For anything wrong, Indexly tells you why

A flagged claim without a cause is just a complaint. Knowing why tells you whether to fix a page, correct a third-party listing, or just keep watching.

Misread your own website

The AI pulled from your site but parsed it wrong — an old price left in a footer, a stale schema field, or a page it read out of context.

Cited a bad third-party source

A directory, review site or forum has outdated or incorrect information about you, and the AI trusted it over your own pages.

Fabricated outright

No source backs the claim at all — the model generated a plausible-sounding detail with nothing behind it.

Reviewer Experience

A single dense queue, sorted by severity, built for speed

Confirm a finding, mark it a false positive, or flag that your own fact was wrong — which loops back to fixing the source fact instead of re-flagging the same claim forever. Keyboard shortcuts keep a reviewer moving through dozens of claims without touching a mouse.

  • Queue sorted by severity — highest-impact claims first
  • Confirm, mark false positive, or fix the source fact in one keystroke
  • “Our fact was actually wrong” loops back to your Brand Truth Graph
  • Built for speed, not for occasional spot-checks
Review queue7 pending
PerplexityOutdatedSeverity 65

“Indexly's Growth plan starts at $49/month.”

C confirmF false positiveW fix fact
  • Grok“Indexly includes built-in Reddit ad management.”Misattributed
  • “Indexly is SOC 2 Type II compliant.”Correct

What customers say

Trusted by brand and marketing teams

We had no idea ChatGPT was telling prospects our free trial needed a credit card. It doesn't, and it never has. Fixed within a day of the flag landing in our queue.

Priya Anand

Priya Anand

Head of Brand, Northloop

The severity score is what got this past leadership. We don't chase every AI misstatement — just the handful that could actually cost us a deal.

Marcus Webb

Marcus Webb

VP Marketing, Fieldstack

Verification, not another guess

Verified by humans. Not guessed by another model.

An accusation against ChatGPT or Gemini only holds up if the thing checking it isn't just another LLM guessing. Every verdict here traces back to a fact your own team approved.

100+

ground-truth facts approved per brand

<15 min

to approve your first Brand Truth Graph

6

AI engines checked in parallel

5

verdicts — Correct through Unverifiable

Grok

Find out what AI is already telling people about you

Approve your first facts in under 15 minutes. Indexly starts checking real AI responses against them the same day.

Grok

FAQ

Questions teams ask before turning this on

Want a deeper walkthrough? Book a demo.

What is AI hallucination detection?

It's the practice of checking factual claims an AI model makes about your brand — pricing, features, certifications, integrations, dates — against a verified source of truth, rather than assuming the AI is right. Indexly extracts every claim from real AI responses that mention your brand and checks each one against your approved Brand Truth Graph.

How does Indexly know what's actually true about my brand?

You build a Brand Truth Graph — ground-truth facts you approve yourself, covering pricing, dates, capabilities, certifications and more. Approving 100+ facts takes under 15 minutes. Every verdict is checked against this human-verified graph, not another LLM's guess — which is what makes a flagged hallucination credible.

How is this different from AI visibility or mention tracking?

Mention and citation tracking tells you whether AI is talking about you. Hallucination detection tells you whether what it said is true. A brand can top every AI visibility report and still have ChatGPT quoting a lapsed certification or a competitor's price — mention tracking won't catch that; a truth check will.

What are the five verdicts a claim can get?

Correct, Incorrect, Outdated, Misattributed and Unverifiable. Correct claims are surfaced too, not just the misses — so you see wins alongside problems.

What do the severity and confidence scores mean?

Every flagged claim gets a 0–100 severity score so you can triage what matters — a wrong price outranks a wrong founding year — plus a confidence score and plain-English reasoning explaining the verdict.

What is root-cause tracing?

For anything flagged wrong, Indexly traces why: did the AI misread your own website, cite a bad third-party source, or fabricate the claim outright with no source at all?

What if Indexly flags something and my own fact was actually wrong?

Mark it "our fact was actually wrong" in the reviewer queue — it loops back to correcting the source fact in your Brand Truth Graph, so the system self-corrects instead of repeatedly flagging the AI for your own error.

Which AI engines does hallucination detection cover?

Six major AI engines: ChatGPT, Claude, Gemini, Perplexity, Grok and Google AI Overview — extracted from real, captured responses on each engine, not synthetic test prompts.

Is this a manual audit I have to run?

No. Once your Brand Truth Graph is approved, checking runs automatically and continuously against real AI-engine responses that mention your brand. Flagged claims land in your reviewer queue, sorted by severity, as they're found.

Stop guessing what AI is saying about you

Approve your Brand Truth Graph, and Indexly checks every AI claim about your brand against it — automatically, continuously, across ChatGPT, Claude, Gemini, Perplexity, Grok and Google AI Overview.

ChatGPT said this about youFlagged

“Indexly requires a credit card to start the free trial.”

IncorrectSeverity 7894% confident
Why: Approved fact: 14-day free trial, no card required.
Perplexity
Outdated
GrokGrok
Misattributed
Gemini
Correct