Verdantix: The Seven Best Climate Change Consultancies 2025
As the urgency to address climate change intensifies, organisations worldwide are seeking expert guidance to navigate a rapidly evolving landscape of risks, regulations and opportunities.
Climate change consulting has emerged as a critical service, empowering businesses, governments and institutions to develop robust transition strategies, decarbonise operations and ensure resilience in the face of environmental volatility.
No longer limited to setting broad net zero targets, today’s clients demand tailored, actionable plans that integrate climate risk analysis, digital innovation and sector-specific expertise.
The Verdantix Green Quadrant
The Verdantix Green Quadrant for Climate Change Consulting 2025 is an authoritative benchmark, evaluating the capabilities and momentum of the world’s leading consulting firms.
Drawing on comprehensive research – including vendor briefings, client interviews and a rigorous 31-point questionnaire – the report assesses twelve prominent providers across five capability and seven momentum categories.
The Green Quadrant methodology is designed to help organisations select the right partner for their climate transition journey, weighing both strategic and implementation strengths in areas such as climate risk analysis, digital transformation and energy transition support.
In 2025, the market has matured and consolidated, with global service giants dominating the landscape. The report highlights the increasing demand for digital climate services and the growing complexity of regulatory and technological challenges.
“Despite some big economic and policy headwinds, the market is resilient and competitive; it is however in a mindset shift from mitigation to adaptation, across decarbonisation, energy transition and climate risk,” says Connor Taylor, Senior Analyst at Verdantix.
The seven firms recognised as Leaders in the 2025 Green Quadrant – Capgemini, Deloitte, EY, ERM, WSP, KPMG and PwC – demonstrate the most comprehensive climate change consulting capabilities, setting the standard for the industry.
Capgemini: digital innovation and holistic climate solutions
Following its recent rapid ascent in the sustainability advisory landscape, Capgemini has firmly established itself as a Leader in the Verdantix Green Quadrant for Climate Change Consulting 2025. The firm’s recognition is grounded in its ability to blend deep technology expertise with robust climate strategy, offering clients a comprehensive suite of services that address the full spectrum of climate transition challenges.
Capgemini’s approach is distinguished by its strong focus on digital transformation and data-driven solutions. Leveraging its global network of more than 340,000 professionals, the firm supports organisations in designing and implementing net zero strategies, decarbonising operations and embedding sustainability into core business processes.
A hallmark of Capgemini’s climate offering is its commitment to achieving net zero not only for its clients but also within its own operations. The company aims to reach carbon neutrality in its operations by 2025 and across its supply chain by 2030, with a target of becoming a net zero business by 2040.
Deloitte: digital and strategic depth
Deloitte has been recognised as a Leader for its strong momentum and market vision, particularly in delivering end-to-end climate transition strategies across industries.
The firm’s capabilities span energy transition, regulation, tax advisory and digital solutions.
Deloitte’s GreenLight Solution, for example, helps organisations map investment roadmaps and access a global database of incentives and tax credits, while its GreenSpace Tech platform connects clients with climate technology providers, facilitating the adoption of innovative solutions. The report underscores Deloitte’s ability to blend strategic advisory with practical implementation, making it a go-to partner for organisations seeking both resilience and sustainable growth.
“We are proud of this prestigious recognition from Verdantix, which underscores the demand for consulting services in the sustainability sector,” says Jennifer Steinmann, Deloitte Global Sustainability Business leader.
“Today’s business leaders are seeking broad, tech-enabled transition strategies that mitigate risk and also drive long-term resilience and deliver returns on investment. Deloitte is uniquely positioned to work hand-in-hand with its clients to unlock enduring, sustainable growth.
“Deloitte’s extensive capabilities, strategic services, focus on implementation, and innovative tech solutions set us apart as a leader in the field.”
ERM: technical prowess and strategic expertise
ERM, the world’s largest specialist sustainability consultancy, achieved the joint highest score for capabilities in the 2025 assessment.
The firm is particularly noted for its leadership in climate transition analysis and risk management, with the report stating that “no vendors exceed ERM in terms of the overall breadth and depth of their climate change consulting capabilities".
ERM’s strength lies in its ability to deliver both technical and strategic solutions at scale, supporting clients across sectors as they navigate decarbonisation, climate resilience and the integration of sustainability into core business operations.
ERM is the only firm to achieve the maximum score for transition risk analysis, reflecting its market-leading expertise in this area.
“We’re proud to achieve this recognition from Verdantix for our climate change consulting capabilities at a point in time when businesses are facing an increasingly complex set of challenges in progressing their decarbonization journeys,” says Matt Klein, Global Service Leader, Corporate Sustainability & Climate Change at ERM.
“ERM’s combination of strategic and technical expertise is helping our clients meet the moment, which means navigating today’s uncertainties while staying focused on building resilience, creating value and unlocking the commercial benefits of integrating sustainability deep into their organisations.”
EY: integrating sector expertise and digital innovation
EY continues its leadership in climate change consulting by leveraging sector-specific knowledge and advanced digital capabilities. The firm’s approach emphasises embedding climate strategies into broader business transformation initiatives, supported by partnerships with technology leaders and a focus on data-driven solutions.
EY’s global reach and ability to manage complex, multi-stakeholder projects make it a preferred choice for large multinationals seeking to address financial, operational and regulatory climate risks.
The Green Quadrant highlights EY’s proficiency in digital technology implementation and its commitment to scalable, modular services that can adapt to client needs.
“We are excited to be recognised for our world-class technical capabilities, unmatched expertise in climate transition strategy, global reach and sector-specific depth,” says Velislava Ivanova, Americas Chief Sustainability Officer and Global Strategy and Markets Leader, Climate Change and Sustainability Service at EY.
“This accolade acknowledges EY’s ongoing focus and commitment to investing in technology and AI, and to creating and continually developing our market leading solutions, tools and enablers, with Verdantix describing EY’s digital solution portfolio as 'robust and mature'.”
KPMG: driving the energy transition
KPMG stands out for its dedicated energy transition team and expertise in supporting clients through the complexities of decarbonisation and renewable energy procurement.
The firm’s consulting services are grounded in a deep understanding of regulatory frameworks and financing mechanisms, helping organizations develop investment strategies that align with evolving climate policies.
KPMG’s holistic approach integrates technical, financial, and policy advisory, enabling clients to manage transition risks and seize opportunities in the low-carbon economy.
PwC: leading in digital transformation and disclosure
PwC is recognised for its market-leading capabilities in digital technology implementation and climate data management.
The firm’s proprietary digital solutions and broad partnership programs support clients in managing climate reporting, risk analysis and supply chain decarbonisation.
PwC’s focus on integrating climate considerations into enterprise-wide digital transformation projects positions it as a leader for organisations seeking to future-proof their operations and meet stakeholder expectations for transparency and accountability.
WSP: implementation excellence and sector reach
WSP distinguishes itself through its strong track record in implementation, particularly in renewable energy procurement and energy services.
The firm’s expertise spans a wide range of sectors, enabling it to deliver practical, scalable solutions for clients facing diverse climate challenges.
WSP’s capabilities in project management and technical delivery are complemented by a commitment to innovation, making it a trusted partner for organisations aiming to accelerate their climate transition and achieve tangible results.
"As the market shifts and matures, we are extremely proud to be recognized by Verdantix for the depth of our climate expertise and the breadth of its applications to support our clients’ growing needs," says André-Martin Bouchard, WSP’s Global Director, Earth & Environment.
"As trusted advisors to organisations around the world, we combine our Future Ready mindset with technical excellence to empower our clients to accelerate climate action, build resilience, and shape a sustainable legacy."
