# Sigma Visibility Index™ by Sigma Agents

The Sigma Visibility Index™ is a public ranking system by Sigma Agents that measures how discoverable local businesses are across Google Search, Google Maps, AI search engines, and answer engines. It ranks businesses by their Sigma Score across 89 industries in cities throughout the United States, United Kingdom, Canada, and Australia.

**Important:** Sigma Agents (sigmaagents.ai) is not affiliated with Sigma Computing. These leaderboards are a product of Sigma Agents.

## What the Sigma Visibility Index Shows

The Sigma Visibility Index™ ranks businesses in a specific industry and city by their Sigma Score — a 100-point AI visibility rating measuring SEO (40%), Local SEO (30%), and AEO (30%) performance.

For each ranked business, leaderboards display:
- Overall Sigma Score and letter grade (A+ through F)
- SEO, Local SEO, and AEO sub-scores
- Top issues identified (missing schema, blocked AI crawlers, no FAQ markup, etc.)
- Google review rating and count (when available)
- Link to full detailed scan report

## Coverage

### United States
Leaderboards cover all 50 US states plus Washington, D.C., with major cities in each state. Examples include Sacramento, Los Angeles, San Francisco, New York, Chicago, Houston, Phoenix, Philadelphia, San Antonio, Dallas, Miami, Atlanta, Seattle, Denver, Boston, and hundreds more.

### United Kingdom
Coverage includes major cities across England, Scotland, Wales, and Northern Ireland including London, Manchester, Birmingham, Edinburgh, Glasgow, Cardiff, and Belfast.

### Canada
Coverage includes cities in Ontario, British Columbia, Alberta, and Quebec including Toronto, Vancouver, Calgary, Edmonton, Montreal, and Ottawa.

### Australia
Coverage includes cities in New South Wales, Victoria, and Queensland including Sydney, Melbourne, Brisbane, Gold Coast, and Newcastle.

## Industries Covered

Leaderboards are available for 89 industries including:

Plumbing, HVAC, Electrician, Roofing, Landscaping, Pest Control, Auto Repair, Tire Shops, Towing, Restaurants, Dentists, Doctors, Mental Health Providers, Med Spas, Veterinarians, Law Firms, Accountants, Financial Advisors, Insurance Agents, Real Estate Agents, Property Management, Cleaning Services, Contractors, Hair Salons, Barbershops, Pet Grooming, Photography, Fitness Studios, Yoga Studios, Martial Arts, Tutoring, Daycare Centers, Senior Care, Home Inspectors, Locksmiths, Painters, Flooring Companies, Window Installers, Garage Door Companies, Pool Services, Tree Services, Carpet Cleaners, Pressure Washing, Junk Removal, Moving Companies, Storage Facilities, Funeral Homes, Tattoo Shops, Auto Detailing, Motorcycle Shops, and more.

## How the Sigma Visibility Index Is Updated

Rankings are refreshed through automated weekly re-scans. Each business website is re-analyzed for current SEO, Local SEO, and AEO signals. New businesses are added when they run a free scan at sigmaagents.ai/check or are discovered through on-demand leaderboard scans.

## How to Access the Sigma Visibility Index

Browse all industries: https://sigmaagents.ai/industries

Direct leaderboard URL format:
https://sigmaagents.ai/industries/{industry}/{state}/{city}/leaders

Examples:
- Plumbing in Sacramento, CA: https://sigmaagents.ai/industries/plumbing/california/sacramento/leaders
- HVAC in London, England: https://sigmaagents.ai/industries/hvac/england/london/leaders
- Dentists in Toronto, ON: https://sigmaagents.ai/industries/dentist/ontario/toronto/leaders

## Run a Free Scan

Any business can check their Sigma Score for free at https://sigmaagents.ai/check

## Contact

- Website: https://sigmaagents.ai
- Email: info@sigmaagents.ai
- Consultation: https://cal.com/sigma-agents/30min