Fact Sentinel

FactSentinel helps you verify claims on any webpage without opening another tab. Select text, right-click, and get an AI-powered fact-check with a verdict, confidence score, explanation, and sources you can inspect.

Use FactSentinel when you are reading news, checking social posts, reviewing research, or validating a claim before you share it.

Key features:
- Instant fact-checking from selected text
- Source-backed verdicts with confidence scores
- Web-search-enhanced verification for current claims
- Auto-Protection for passive scanning as you browse
- Verification history for revisiting past checks
- Optional X/Twitter correction drafts
- Platform mode for quick setup, or BYOK mode with your own OpenAI/Anthropic keys

Privacy matters. In BYOK mode, requests go directly to your chosen AI provider and your keys stay local. Platform mode is available when you want FactSentinel to handle setup and AI costs.

Install FactSentinel to check claims in seconds and browse with more confidence.