Stop Misinformation Before It Spreads

FactSentinel flags false claims as you browse and checks any text you select with a right-click. Manual checks use two AI models, so you see where they agree, with sources you can follow.

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No credit card required Works on any website We do not store the text you check
FactSentinel
FALSE 94% confidence
"5G towers cause respiratory illness and weaken the immune system"

No scientific evidence supports this claim. Multiple peer-reviewed studies have found no link between 5G and respiratory health.

Example result 👍 👎
6x
Faster spread of false news
than true news (MIT, Science, 2018)
2
AI models cross-check
every manual check
10
Free manual checks
every month

Misinformation spreads faster than ever. You can't fact-check everything manually. FactSentinel watches your back automatically, alerting you to false claims before you share or believe them.

How It Works

Get protected in under a minute. No technical setup required.

1

Install the Extension

Add FactSentinel to Chrome. It takes about 10 seconds.

2

Browse Normally

Auto-Protection scans pages for false claims as you browse. No extra effort required.

3

Stay Informed

Get instant alerts when misinformation is detected. Right-click any text to verify manually.

Built for Truth-Seekers

Whether you're a journalist, researcher, educator, or concerned citizen.

🛡️

Auto-Protection

FactSentinel scans pages automatically as you browse, alerting you to false claims before they mislead you. Your always-on misinformation shield.

⚡

Instant Verification

Select any text, right-click, and get AI-powered fact-checking results in seconds. Perfect for claims you want to verify manually.

⚖️

Multi-AI Accuracy

Manual checks run through both OpenAI and Anthropic Claude, so you can see where they agree. Agreement is a useful signal, not a guarantee, and every result links its sources.

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Privacy Options

Use our platform for convenience, or bring your own API keys. With BYOK, requests go directly to the AI providers, so we never receive your keys or claim text. On Platform we do not store the text you submit either.

Simple, Honest Pricing

Start free. Upgrade when you need more.

Free

$0
forever
  • 10 manual checks/month
  • 50 auto-protection scans
  • Browser extension
  • No credit card needed
Start Free

BYOK License

$29
one-time, unlimited forever
  • Unlimited checks forever
  • Use your own API keys
  • Your keys stay in your browser
  • Two-model consensus when you add both keys
Get the $29 License

Platform

$10
/month
  • 100 manual checks/month
  • 400 auto-protection scans
  • We handle all AI costs
  • Cancel anytime
See Platform Details

See how FactSentinel rules on claims people actually search for.

False Most millionaires inherited their wealth False Walt Disney's body was cryogenically frozen after his death True Cleopatra lived closer in time to the Moon landing than to the construction of the Great Pyramid False The Great Wall of China is visible from space with the naked eye True The Oxford University is older than the Aztec Empire False The average attention span is now shorter than a goldfish
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