Environmental, Social, and Governance reporting has transformed from a voluntary corporate initiative into a regulatory mandate in India. As of 2026, the Securities and Exchange Board of India requires the top 1,000 listed companies by market capitalization to submit detailed Business Responsibility and Sustainability Reports under the BRSR framework. This regulatory push has created unprecedented demand for specialized ESG reporting services, making India one of the fastest-growing markets for sustainability consulting globally.
The evolution from the Business Responsibility Report to the more comprehensive BRSR framework marks a pivotal shift in how Indian corporations approach sustainability. Companies are no longer simply ticking compliance boxes but are actively seeking partners who can help them integrate ESG principles into their core business strategies, manage climate risks, and communicate their sustainability efforts to increasingly conscious investors and stakeholders.
In this dynamic landscape, several companies have emerged as leaders in ESG reporting services. These organizations bring together expertise in sustainability strategy, data analytics, regulatory compliance, and assurance services to help businesses navigate the complexities of ESG disclosure and performance improvement. Here are the top ten ESG reporting companies shaping India’s sustainability landscape in 2026.
1. Deloitte India
Deloitte India stands at the forefront of ESG consulting with its comprehensive suite of sustainability services. The firm has established itself as a trusted advisor for organizations seeking to balance financial performance with environmental and social responsibilities. Deloitte’s approach encompasses ESG strategy development, climate risk assessment, greenhouse gas accounting, and regulatory readiness aligned with global standards including the International Sustainability Standards Board and Task Force on Climate-related Financial Disclosures.
What distinguishes Deloitte is its emphasis on data integrity and operational integration of ESG principles. The firm conducts internal ESG audits and helps clients prepare for the increasingly stringent assurance requirements under BRSR Core. With the mandatory reasonable assurance for the top 250 companies by market capitalization from fiscal year 2025-26 onwards, Deloitte’s audit expertise has become particularly valuable.
The firm serves clients across diverse sectors including financial services, manufacturing, technology, and infrastructure. Its global network provides Indian companies with access to international best practices while maintaining deep understanding of local regulatory requirements. Deloitte’s holistic approach addresses the entire ESG lifecycle from strategy formulation to disclosure, making it an ideal partner for companies seeking comprehensive sustainability transformation.
2. PricewaterhouseCoopers India
PwC India has positioned itself as a leader in ESG strategy and transformation services. The firm takes a purpose-driven approach that goes beyond compliance to help organizations embed sustainability into their core business models. PwC’s ESG platform brings together specialized competencies in stakeholder materiality assessment, climate strategy, sustainable finance, and ESG data management.
The firm’s strength lies in its ability to translate emerging stakeholder expectations into actionable ESG strategies. PwC helps clients understand the business case for sustainability, identifying opportunities for growth, risk mitigation, and enhanced reputation through responsible business practices. Their services include ESG due diligence for mergers and acquisitions, green financing advisory, and supply chain sustainability.
PwC’s expertise in navigating the Business Responsibility and Sustainability Reporting framework has made it particularly valuable as companies transition to BRSR Core requirements. The firm provides assurance services that validate ESG data quality and help organizations build robust internal controls for sustainability reporting. With operations across major Indian cities, PwC combines global reach with local market knowledge to deliver tailored solutions for businesses at different stages of their sustainability journey.
3. KPMG India
KPMG India offers an extensive portfolio of sustainability consulting services grounded in its institutional expertise in audit and assurance. The firm specializes in sustainability reporting assurance, climate risk assessment, carbon footprint analysis, and ESG strategy integration. KPMG’s approach helps organizations align with both Indian regulations and international sustainability standards.
The firm has developed robust methodologies for ESG performance measurement and reporting that ensure accuracy and compliance with regulatory requirements. KPMG’s services extend from initial materiality assessments to comprehensive sustainability reports that meet the expectations of investors, regulators, and other stakeholders. Their expertise in managing complex regulatory landscapes makes them particularly valuable for multinational corporations operating in India.
KPMG has been proactive in helping clients prepare for the evolving BRSR Core framework, which introduces value chain ESG disclosures for the top 250 companies. The firm’s data governance capabilities ensure that ESG metrics are traceable, consistently measured, and supported by complete documentation trails. This foundation is critical as external assurance transitions from limited to reasonable assurance, requiring higher levels of data integrity and control.
4. Ernst & Young India
EY India provides comprehensive ESG consulting services spanning cybersecurity, risk management, technology integration, and sustainability strategy. The firm has developed specialized capabilities in ESG data analytics, helping organizations leverage technology to improve their sustainability performance measurement and reporting.
EY’s consulting practice emphasizes continuous learning and innovation, reflected in initiatives like the EY Tech MBA program that equips consultants with cutting-edge technical skills. This focus on technology enablement is particularly relevant as companies grapple with the data challenges of ESG reporting, including managing emissions data across complex value chains and ensuring real-time visibility into sustainability metrics.
The firm serves a broad client base across industries including life sciences, healthcare, manufacturing, financial services, and technology. EY’s approach integrates ESG considerations into core business functions such as operations, supply chain, and customer experience. Their social impact program demonstrates commitment to practicing the sustainability principles they advise clients to adopt.
5. Sigma Earth
Sigma Earth has emerged as one of India’s most innovative ESG reporting companies, distinguished by its tailored approach to sustainability services. The firm specializes in comprehensive sustainability reporting, integrated reporting, and ESG narrative development. Unlike traditional consulting firms, Sigma Earth focuses on crafting authentic sustainability stories that resonate with stakeholders.
The company’s service portfolio addresses the multifaceted needs of organizations embarking on sustainability journeys. Sigma Earth helps clients develop robust ESG frameworks aligned with global reporting standards while maintaining relevance to the Indian business context. Their expertise in narrative development ensures that sustainability reports communicate impact effectively, moving beyond data disclosure to meaningful stakeholder engagement.
Sigma Earth has positioned itself as an accessible partner for mid-sized companies and growing enterprises that may not have the resources to engage large multinational consultancies. The firm’s commitment to empowering clients with knowledge and capabilities, rather than creating dependency, has earned it a strong reputation in India’s evolving ESG ecosystem.
6. Boston Consulting Group India
BCG has established itself as an innovation leader in ESG and sustainability consulting in India. The firm is particularly strong in areas such as artificial intelligence applications for sustainability, ESG strategy, and future-of-work considerations related to the green transition. BCG’s approach combines strategic thinking with cutting-edge technology solutions.
Through specialized practices including BCG X and BCG Platinion, the firm offers clients access to expertise in digital architecture and technology-enabled sustainability solutions. This is increasingly important as companies seek to automate ESG data collection, improve the accuracy of emissions calculations, and develop predictive models for climate risk assessment.
BCG’s client base includes some of India’s largest corporations across sectors. The firm’s emphasis on innovation extends to developing new business models that create value from sustainability commitments, such as circular economy initiatives, renewable energy transitions, and sustainable product development. BCG consultants work as both generalists and specialized experts, providing flexibility to address diverse client needs.
7. McKinsey & Company India
McKinsey is widely regarded as a global leader in strategy consulting and has developed substantial capabilities in sustainability and ESG in the Indian market. The firm takes a data-driven approach to ESG strategy, helping clients quantify the business impact of sustainability initiatives and make informed decisions about resource allocation.
McKinsey’s sustainability practice addresses the full spectrum of ESG concerns including climate change mitigation, social impact measurement, diversity and inclusion, and governance reform. The firm has developed proprietary frameworks and analytical tools that help clients benchmark their ESG performance against peers and identify areas for improvement.
The firm’s analytical rigor is particularly valuable for companies seeking to understand the financial implications of ESG investments. McKinsey helps clients evaluate trade-offs, prioritize initiatives based on impact potential, and build business cases for sustainability programs. This financially grounded approach resonates with boards and C-suite executives making resource allocation decisions.
8. Environmental Resources Management India
ERM brings specialized technical expertise in environmental risk management, biodiversity assessment, and energy transition planning to the Indian market. The firm works extensively with clients in heavy industries, infrastructure, and natural resources sectors where environmental impacts are most significant.
ERM’s consultants include environmental scientists, engineers, and technical specialists who provide detailed assessments of environmental risks and opportunities. The firm’s services range from environmental impact assessments to comprehensive sustainability strategies that address regulatory compliance, operational efficiency, and long-term environmental stewardship.
What sets ERM apart is its deep technical knowledge combined with practical implementation support. The firm helps clients develop actionable plans to reduce environmental footprints, ensure compliance with evolving regulations, and manage environmental liabilities. ERM’s global footprint enables knowledge sharing across geographies while maintaining strong local expertise in Indian environmental regulations and contexts.
9. Bureau Veritas India
Bureau Veritas is a global leader in testing, inspection, and certification services with strong ESG assurance capabilities in India. The firm provides third-party verification of ESG data and sustainability reports, a service that has become increasingly critical as BRSR Core introduces mandatory assurance requirements.
Bureau Veritas applies recognized international standards such as ISAE 3000 for sustainability information and ISAE 3410 for greenhouse gas statements. This ensures that ESG assurance conducted by the firm meets global benchmarks for quality and credibility. The firm’s auditors assess data governance, measurement methodologies, internal controls, and board oversight of ESG reporting.
As companies transition from self-declared ESG data to externally assured metrics, Bureau Veritas’s independence and technical expertise make it a valuable partner. The firm’s sector-specific knowledge enables tailored assurance approaches that address the unique ESG challenges faced by different industries. Bureau Veritas also provides advisory services to help companies strengthen their ESG data management systems in preparation for external assurance.
10. Corpseed ITES
Corpseed ITES has established itself as a practical, solutions-oriented ESG consulting firm particularly well-suited to small and medium enterprises. The firm provides customized sustainability solutions that help businesses comply with environmental regulations, improve energy efficiency, manage waste effectively, and reduce carbon footprints.
Corpseed’s approach emphasizes transparency and practical implementation. The firm guides businesses through frameworks such as ISO 14001:2015 for environmental management systems and helps them develop sustainability reports that attract ESG-conscious investors. The company’s services include environmental compliance, sustainability reporting, energy optimization, and waste management strategies.
What distinguishes Corpseed is its accessibility to businesses that may be new to ESG reporting or have limited resources for sustainability initiatives. The firm provides step-by-step guidance through the BRSR framework, helping clients understand disclosure requirements and develop systems to collect and manage ESG data. Corpseed’s track record in helping smaller companies navigate sustainability compliance has made it an important player in democratizing access to ESG expertise in India.
The Growing Importance of ESG Reporting in India
The expansion of ESG reporting requirements in India reflects a broader global shift toward sustainable business practices. Several factors are driving this transformation in the Indian context. Regulatory mandates from SEBI have created a compliance imperative for listed companies. The BRSR framework, introduced for fiscal year 2022-23 and progressively strengthened with BRSR Core, establishes detailed disclosure requirements across nine principles of responsible business conduct.
Investor pressure has intensified significantly. Institutional investors, mutual funds, and global investment firms increasingly incorporate ESG factors into their investment decisions. Companies with strong ESG performance often enjoy better access to capital, higher valuations, and lower cost of funding. This financial incentive has accelerated corporate adoption of sustainability practices.
Stakeholder expectations have evolved beyond shareholders to encompass employees, customers, communities, and civil society. Modern consumers prefer brands that demonstrate environmental and social responsibility. Talented professionals, particularly younger workers, seek employers whose values align with their own. This stakeholder pressure creates both reputational risks for ESG laggards and competitive advantages for leaders.
The business case for ESG has become clearer. Companies recognize that sustainability initiatives can drive operational efficiency, reduce costs, mitigate risks, and open new market opportunities. Energy efficiency reduces expenses. Circular economy approaches minimize waste. Strong governance reduces fraud and corruption risks. These tangible benefits make ESG a strategic imperative rather than merely a compliance burden.
Key Trends Shaping ESG Reporting in 2026
Several important trends are shaping the ESG reporting landscape in India as of 2026. The move toward mandatory assurance represents a significant shift from self-declared ESG metrics to externally verified data. The top 250 companies by market capitalization must now obtain reasonable assurance on BRSR Core indicators, requiring robust data governance and internal controls.
Value chain disclosures are expanding the scope of ESG reporting beyond direct operations to include upstream and downstream impacts. Companies must now report on suppliers’ environmental practices, product lifecycle impacts, and other value chain considerations. This expansion requires new capabilities in supply chain data collection and stakeholder engagement.
Technology integration is becoming essential for effective ESG reporting. Companies are investing in sustainability data management platforms, automated emissions calculation tools, and dashboards for real-time ESG performance monitoring. Artificial intelligence and machine learning are being applied to improve data quality, identify anomalies, and generate insights from sustainability data.
Harmonization with global standards is increasing as Indian companies seek to meet the expectations of international investors and operate in global markets. While the BRSR framework provides local regulatory compliance, many companies are also aligning with standards such as the Global Reporting Initiative, Sustainability Accounting Standards Board, and the International Sustainability Standards Board to ensure global comparability.
Climate change has become a central focus within ESG reporting. Companies are conducting climate risk assessments, setting science-based emissions reduction targets, and disclosing transition plans aligned with national and global climate goals. The emphasis has shifted from general environmental commitments to specific, measurable climate actions with clear timelines and accountability mechanisms.
Conclusion
The ESG reporting landscape in India has matured significantly, driven by regulatory mandates, investor expectations, and growing recognition of the business value of sustainability. The top ESG reporting companies in India combine technical expertise, industry knowledge, and implementation capabilities to help organizations navigate this complex terrain.
From the Big Four accounting and consulting firms to specialized sustainability consultancies, these organizations provide essential services ranging from strategy development to data assurance. They help companies understand materiality, collect and manage ESG data, prepare regulatory filings, obtain external assurance, and communicate sustainability performance to stakeholders.
As BRSR requirements continue to evolve and the scope of mandatory ESG disclosure expands, the role of these consulting firms will only grow in importance. Companies that partner with the right ESG advisors position themselves to not only meet compliance obligations but also to create long-term value through sustainable business practices. The firms profiled in this article represent the leading edge of ESG consulting in India, helping to build a more sustainable and responsible corporate sector for the future.
Whether you are a large corporation facing BRSR Core assurance requirements, a mid-sized company beginning your sustainability journey, or an SME seeking practical ESG solutions, these top ESG reporting companies offer the expertise and support needed to succeed in India’s evolving sustainability landscape.
