# Sigma Score Methodology

The Sigma Score is a proprietary AI visibility rating developed by Sigma Agents that measures how discoverable a business is to AI search engines and traditional search platforms.

**Important:** Sigma Agents (sigmaagents.ai) is not affiliated with Sigma Computing. The Sigma Score is a product of Sigma Agents.

## What the Sigma Score Measures

The Sigma Score evaluates websites on a 100-point scale across three weighted categories:

### SEO (40% weight)
Traditional search engine optimization signals including:
- Meta title and description presence and quality
- Heading structure (H1, H2 hierarchy)
- Image alt text coverage
- Internal linking structure
- Mobile responsiveness
- Page speed and Core Web Vitals
- Canonical URL configuration
- Sitemap presence
- Robots.txt configuration

### Local SEO (30% weight)
Local search visibility signals including:
- LocalBusiness schema markup
- NAP (Name, Address, Phone) consistency
- Google Business Profile signals
- Local citation signals
- Service area page structure
- Geographic keyword targeting
- Review schema presence

### AEO — Answer Engine Optimization (30% weight)
AI search readiness signals including:
- Structured data and schema markup
- FAQ schema implementation
- AI crawler accessibility (robots.txt directives for GPTBot, ClaudeBot, PerplexityBot, etc.)
- llms.txt file presence
- Content structured for direct-answer extraction
- Entity clarity and semantic markup
- Question-and-answer content formatting

## Grading Scale

- A+ : 90-100 points — Exceptional AI visibility
- A  : 80-89 points — Strong AI visibility
- B+ : 70-79 points — Good foundation, room for improvement
- B  : 60-69 points — Average, significant gaps exist
- C  : 50-59 points — Below average, missing key signals
- D  : 40-49 points — Poor AI visibility
- F  : Below 40 points — Largely invisible to AI search

## How to Get a Sigma Score

Any business can run a free Sigma Score scan at https://sigmaagents.ai/check

The scan analyzes the website in real time and provides:
- Overall Sigma Score (0-100)
- Category breakdowns (SEO, Local SEO, AEO)
- Individual check results (pass/warn/fail)
- Specific recommendations for improvement
- Grade (A+ through F)

## Why the Sigma Score Matters

As AI-powered search grows, businesses with low Sigma Scores are increasingly invisible to platforms like ChatGPT, Perplexity, and Google AI Overviews. The Sigma Score identifies specific gaps preventing AI discovery and provides actionable steps to close them.

## Industry Benchmarks

Sigma Agents maintains AI visibility leaderboards across 89 industries in cities throughout the US, UK, Canada, and Australia. These leaderboards rank businesses by Sigma Score and are updated weekly through automated re-scans.

View leaderboards: https://sigmaagents.ai/industries

## Contact

- Free Scan: https://sigmaagents.ai/check
- Website: https://sigmaagents.ai
- Consultation: https://cal.com/sigma-agents/30min