Stop AI hallucinations before they fool you.
Verol is a real-time AI hallucination detector that automatically fact-checks every response from any AI assistant. Catch fabricated facts, unverified claims, and AI-generated misinformation — without switching a single tab.
Works with all major AI platforms
Detect AI hallucinations
without changing your workflow.
Install the Extension
Add Verol to your browser in under 5 seconds. No complex setup, no credit card required to start verifying.
Use Any AI Chat Interface
Open any AI assistant in your browser and type normally. Verol activates automatically, silently monitoring every AI response for hallucinations and unverified claims.
See Hallucinations Flagged Live
Every factual claim is cross-referenced in real time. Red underlines mark AI hallucinations, green badges confirm verified facts — inline, as they appear.
Complete AI hallucination detection,
built for how you work.
A real-time AI fact-checking layer that automatically detects hallucinated claims, fabricated sources, and unverified AI responses — without slowing you down.
Real-Time Verification
Checks claims instantly as the AI types. Verification badges appear live with zero delay, seamlessly blending into your workflow.
Works With Every AI Interface
Works with every major AI chatbot and LLM interface — right where you already work, with zero configuration needed.
Source Citations
Get traceable, clickable reference links to go straight to the true source.
Privacy-First Design
We analyze claims, not your full chat history. No data is stored, and your conversations remain entirely private.
Built for those who
can't afford to be wrong.
AI hallucination affects professionals across every field. When LLMs fabricate facts, the consequences range from wasted hours to serious reputational damage. Verol is the AI accuracy layer that catches mistakes before they reach your work.
Developers & Engineers
AI coding assistants confidently hallucinate APIs, package versions, and unreleased library methods.
Verol cross-references live npm/PyPI registries and GitHub to ensure dependencies and APIs actually exist.
Students & Researchers
Relying on base models for research leads to fabricated historical dates, non-existent papers, and fake quotes.
Every factual claim is extracted and verified against actual web sources in real time before you cite it.
Writers & Publishers
Publishing AI-assisted text exposes you to reputational damage when 'facts' turn out to be completely made up.
Get an instant red-line audit trail of every claim, with the correct verified information highlighted inline.
Analysts & Consultants
LLMs notoriously struggle with precise numerical data, stock metrics, and recent fast-moving market statistics.
Numbers are rigorously tested through semantic search pipelines targeting recent data, bypassing base model cutoffs.
AI hallucination detection that goes
beyond checking links.
Most tools ask the AI to cite sources, then check if a link resolves. Verol is fundamentally different. Our proprietary hallucination detection engine breaks down every AI response into distinct factual claims and validates each one internally against live trusted sources.
Whether you are a developer testing a code library, a marketer verifying a statistic, or a business analyst fact-checking an AI report — accurate, automated AI verification should be a right, not a manual chore.
Semantic Claim Extraction
Verol doesn't wait for citations. It intrinsically reads the AI's response, identifying hard claims, dates, APIs, and numbers dynamically.
Internal Validation Engine
Once claims are identified, our engine parallelizes search queries across trusted sources, preventing SEO spam from muddying the truth.
Not Just for Academia
Designed for developers parsing code, marketers checking statistics, and journalists fighting misinformation—not just researchers verifying quotes.
Automated Cross-Reference
A secondary LLM compares the live search results directly against the original claim, returning a reliable true/false verdict instantly.
Why not just let the AI search?
Native AI chat apps are optimized for speed and low token consumption, not rigorous truth-seeking. Here is how Verol's dedicated verification architecture compares.
Under the hood:
A complex pipeline, abstracted.
Fact-checking real-time AI generation requires more than a simple prompt. We use a multi-stage autonomous agent pipeline to ensure maximum accuracy.
Semantic Extraction
A lightweight, high-speed LLM parses the incoming stream to strip away conversational fluff and isolate hard, verifiable claims (dates, metrics, APIs).
Targeted Grounding
Our orchestrator identifies the claim type and spins up parallel search agents targeting specific verticals (GitHub, Official Docs, News, Live Data).
Cross-Reference
A powerful heavyweight LLM compares the original AI's claim against the retrieved search context, scoring it for truthfulness and generating a correction.
UI Injection
The verdict is piped back into your browser locally and rendered as red/green annotations inside your AI chat using isolated Shadow DOM boundaries.
What happens in your browser, stays in your browser.
We built Verol from the ground up for strict environments. Company policies, NDAs, and personal privacy demand that your chat history isn't saved on third-party servers. So we simply don't.
No Server DB for Prompts
Verification payload is sent to our stateless edge function, processed in RAM, and immediately discarded.
100% Local History
Your entire verification history is stored exclusively in your browser's secure IndexedDB. We literally cannot see it.
Test it yourself: Uninstall the Verol extension and reinstall it. Your history is completely gone. We only log your user account to track credits.
Pay for exactly
what you verify.
Free
Upgrade inside extension
Starter
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Pro
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Extended
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Common questions about AI hallucination & fact-checking.
Everything you need to know about how Verol detects AI hallucinations and keeps your AI outputs accurate.
AI hallucination is when a large language model (LLM) generates text that sounds confident and credible but is factually wrong, fabricated, or entirely made up. This includes invented statistics, fake citations, non-existent APIs, and incorrect dates. It happens because LLMs predict plausible-sounding text based on patterns — not verified facts. Independent AI hallucination detection is essential for any professional use of AI tools.
You can manually cross-reference AI claims in academic databases, trusted news sources, and official documentation — but this is slow and error-prone. Verol automates the entire process: it extracts every factual claim from an AI response and cross-references them against trusted sources in real time, showing inline badges for verified, unverified, or false claims. No tab-switching, no guesswork.
AI language models are trained to predict the next most statistically likely token — not to retrieve or verify real-world facts. When asked about specific data, obscure topics, or events beyond their training cutoff, models fill in gaps with plausible-sounding but fabricated information. This is a structural limitation of all current LLMs, which is why a dedicated AI hallucination checker is essential.
Yes. Verol is a browser extension that integrates with any web-based AI chat interface. It automatically activates when you navigate to any supported AI assistant - no manual setup required per site. We continuously add support for new platforms as the AI landscape evolves.
Studies show that AI language models hallucinate factual content in 15–25% of responses, with rates as high as 70% for specific domains like legal citations or medical statistics. Accuracy also degrades significantly for events after the model knowledge cutoff. Verol has a 94%+ detection accuracy for clear-cut factual claims and provides confidence levels for nuanced or emerging topics rather than guessing.
Yes. Verol uses a privacy-first architecture: only the specific claims being verified are processed - your full conversation is never transmitted, logged, or stored on our servers. All other analysis happens locally in your browser. Your chats remain entirely private.
Yes. Verol offers a free plan with real-time AI hallucination detection and trust indicators for up to 5 verifications per month.
Stop doubting
your AI.
Join thousands of professionals who use Verol to verify their AI outputs in real-time, effortlessly.