Free Diagnostic

What does AI know about your company?

Compare what ChatGPT, Gemini, Claude, and Perplexity say about your company against crawler-visible facts from your website. Get a structured diff report.

What it checks Crawler-visible website facts vs. AI answers across 4 platforms.
Output Accuracy score, discrepancies, what AI doesn't know — delivered to your inbox.
Best use After making changes to your website, or before a full AI Visibility Audit — to see where AI knowledge diverges from your actual identity.
1 free check / month L4 70+ required 4 AI platforms Results to your inbox

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Run your AI Knowledge Diff

Sign in once, enter your domain, and compare what AI systems say against your website facts. L4 ground truth score of 70+ is a hard requirement before the AI Diff can run.

  • 1. Sign in
  • 2. Check website facts
  • 3. Run AI diff
Sign-in via Google or Microsoft is required to prevent abuse. The AI Diff only runs after the L4 ground truth check passes: L4 score 70+, completeness 70+, and no critical missing facts. We receive only your name and email — no inbox access.
1 · Domain
2 · Website Facts
3 · Results
AI Readiness Check

Check if AI crawlers can access your site. Free technical baseline.

Run readiness check

Full AI Visibility Audit

Deeper scoring, citation analysis, and a prioritized remediation plan.

See audit options

Talk to VerisAI

Walk through your results and decide the right next step together.

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Frequently Asked Questions

What is an AI Knowledge Diff?

An AI Knowledge Diff is a point-in-time comparison between what AI systems say about your company and what your website exposes as crawler-visible ground truth. VerisAI first runs a deterministic L4 content check. L4 is a hard requirement: the AI Diff runs only when the L4 score is 70+, ground truth completeness is 70+, and no critical facts are missing. If that gate passes, VerisAI compares AI answers across ChatGPT, Gemini, Claude, and Perplexity. Discrepancies occur when AI models have outdated training data, infer incorrect facts from third-party sources, or cannot resolve your primary identity pages.

How is the AI Knowledge Diff different from the AI Readiness Check?

The AI Readiness Check assesses whether your website is technically accessible and interpretable by AI crawlers — it scores your site's structure and signals across 8 layers. The AI Knowledge Diff goes one step further: it queries AI platforms directly and compares what they say about your company against crawler-visible facts from your website. Use the Readiness Check first to fix technical blockers, then run the Knowledge Diff to see where AI knowledge still diverges.

Is the AI Knowledge Diff free?

Each account includes 1 free check per month. Additional runs are available as credits — useful when you want to verify improvements after fixing structured data or identity signals. Authentication via Google or Microsoft is required to prevent abuse. We only receive your name and email address — no inbox or account access.

What happens after the diff report is generated?

The diff report is delivered to your email and highlights each factual discrepancy between crawler-visible website facts and what AI systems say. To fix the underlying signal gaps — structured data, crawler access, identity consistency — you can order a full AI Visibility Audit from VerisAI.eu, which includes a prioritized Implementation Runbook.

Can I run the diff again after making changes?

Yes. The AI Knowledge Diff is a point-in-time snapshot. After improving your site's structured data and identity signals, you can run another diff to see whether AI accuracy improved. Each account includes 1 free check per month; additional checks are available as credits.