AI detection and writing verification built for schools and editors
ClaimValidator records 0 monthly visits with — month-over-month growth and Free pricing. Second Opinion records 0 monthly visits with 0% growth and Freemium pricing.

AI that checks whether Reddit claims are actually backed by their sources

Fact-check and bias-check any text while you browse
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | chromewebstore.google.com | secondopinion.so |
| Pricing Model | Free | Freemium |
| Monthly Visits | 0 (0) | 0 (0) |
| MoM Traffic Delta | 0 (—) | 0 (0%) |
| Primary Market & Share | 🌐 Global (—) | 🌐 Global (—) |
| Direct Visits / mo | 0 | 0 |
| User Rating | 4.3 | 3.9 |
| Supported Platforms | Browser Extension | Website |

AI that checks whether Reddit claims are actually backed by their sources
A Validate Claim button appears on Old Reddit comments that contain links, so verification is one click away instead of a separate research session.
Instruction fine-tuned models break a comment down into the discrete factual claims the author is implicitly or explicitly asserting.
The tool fetches the linked source and evaluates each claim against it, showing where the citation does and does not hold up.
The codebase is public and the roadmap is shared, covering multi-source comments, Reddit posts, Twitter, and Wikipedia support.

Fact-check and bias-check any text while you browse
Highlight any passage on a website, social platform, or news article and choose Get Second Opinion to receive an analysis without leaving the page.
The model assesses the specific claims in the highlighted text and flags statements that appear unsupported or misleading.
Beyond true or false, it points out loaded wording, one-sided framing, and rhetorical choices that shape interpretation.
Each check surfaces opposing viewpoints and context, so you can compare how the same facts are presented elsewhere.
AI detection and writing verification built for schools and editors
AI sidebar and browser agent for reading, writing and research
AI sidebar and browser agent for reading, writing and research

SpecialistAn open, AI-written encyclopedia built and fact-checked by Grok
SpecialistAn open, AI-written encyclopedia built and fact-checked by Grok
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AI answers grounded in 300M+ scholarly full texts
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AI detector that highlights evidence, not just a score

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Free / Open-sourceA private, on-device AI assistant that runs local LLMs right inside your browser
One-click Grok access from anywhere in your browser
One-click Grok access from anywhere in your browser
Autonomous fact-checking that appears right next to the content you read
Autonomous fact-checking that appears right next to the content you read