# ESG reporting and assurance providers
3 brands ranked by AI visibility (Brand Authority Index)
Top brands:
1. The Big Four (Deloitte, PwC, EY, KPMG) (BAI: 98, professional-services)
2. The Big Four (Deloitte, PwC, EY, KPMG) (BAI: 98, professional-services)
3. Grant Thornton (BAI: 92, professional-services)
Raw queries: ESG reporting and assurance providers