Green Quadrant: Sustainability Consulting (2026)
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Executive Summary
This report provides a detailed, fact-based benchmark of 15 of the most prominent sustainability consulting providers in the market. Based on the proprietary Verdantix Green Quadrant methodology, our analysis entailed two-hour live briefings, client interviews and consulting firm responses to a detailed 69-point questionnaire, covering five capability and 12 momentum categories. This study finds that the sustainability consulting market has changed significantly in recent years, reflecting organizations’ efforts to articulate a clear business case for sustainability, design actionable strategies, manage environmental and social data, and address industry-specific operational realities, in a rapidly evolving landscape. Among the providers featured in the Leaders’ Quadrant, five firms – Deloitte, ERM, EY, KPMG and PwC – demonstrated the most comprehensive sustainability consulting capabilities.
Figure 1. Sustainability service lines
Figure 2. Sustainability sub-service lines
Figure 3. Capabilities criteria for sustainability consulting
Figure 4. Momentum criteria for sustainability consulting
Figure 5. Consulting provider scores: capabilities
Figure 6. Consulting provider scores: momentum
Figure 7. Green Quadrant for sustainability consulting (2026)
About the Authors
Priyanka Bawa
Principal Analyst
Priyanka is a Principal Analyst at Verdantix, where she leads research to enable sustainability leaders and services firms to analyse shifting market dynamics and evaluate inn...
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Callum Millard
Analyst
Callum is an Analyst at Verdantix, helping firms navigate the evolving ESG, sustainability, product innovation and product stewardship landscapes, to drive value creation and ...
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Kim Knickle
Research Director
Kim Knickle is a Research Director at Verdantix, bringing more than two decades of analyst experience to the evolving world of sustainability. Her current research spans ESG a...
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