As sustainability receives increasing attention from regulators, investors and business practitioners, companies must navigate a range of tools for guiding their approach and communicating progress [1]. Research has documented a diverse landscape of reporting and assessment tools, creating an important starting question for organisations: which tools are relevant to its business and what each is intended to achieve [2]?
Four terms are central to this article: standards, frameworks, ratings and certifications. Although often mentioned together, they serve different purposes within a company’s sustainability approach, as summarised below.
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For companies, the practical question is whether the resources invested in these tools will help them meet the demands they face. Can information prepared for one assessment support regulatory reporting or answer an investor’s questions, or will another exercise be needed? Answering this begins with understanding what each tool delivers. This article first sets out what each tool is designed to do. It then focuses on ratings and certifications, examining where they add value, where gaps remain, and how clearer guidance and less duplication could make them more useful to companies.
A sustainability report, a rating score and a certification badge each tell a different story about an organisation. What does each demonstrate, and how do standards and frameworks fit into the picture? The tables below unpack some of the well established sustainability standards, frameworks, ratings and certifications, showing what each tool is designed to do and the outcome companies can expect.
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While often discussed collectively, sustainability standards, frameworks, ratings and certifications serve distinct purposes, each offering a different perspective on an organisation’s sustainability practices and performance.. Adopting a standard or framework shows how a company approaches and reports on sustainability, not how well it performs. A rating shows how the company performs under a provider’s methodology, while a certification confirms conformity with specified requirements within a defined scope. Each should therefore be interpreted according to its purpose and scope, rather than treated as a measure of overall sustainability. Understanding these differences provides a foundation for examining what ratings and certifications offer companies, and where their challenges and limitations lie.
A tool earns its place when it addresses a recognisable need. In procurement, EcoVadis scorecards may inform supplier qualification, tender evaluation and annual performance reviews. For a supplier whose customer uses the assessment to assess the quality of suppliers, participation provides a structured way to demonstrate management practices and respond to identified weaknesses. The buyer determines how the result affects a commercial decision [22]. ESG ratings can support both investment decisions and internal management. MSCI explains that investors use its ESG Ratings to compare financially relevant sustainability risks and inform investment analysis and risk management. EcoVadis identifies strengths and improvement areas, with a Corrective Action Plan feature for managing responses [23]. An assessment becomes more useful when its findings lead to assigned responsibilities and follow-up actions. Its value should therefore be judged partly by what the organisation changes after receiving the result.
Some preparation can support more than one information need. CDP has aligned its questionnaire with IFRS S2 since 2024 and provides mappings between its questions and disclosure requirements [24]. This creates opportunities to reuse information and identify gaps. Alignment supports preparation, but a completed questionnaire does not itself establish that an organisation has met every applicable reporting requirement.
Certifications on the other hand, can also support customer and business partner decisions. GreenCircle may help companies respond to requests for evidence behind environmental claims, while B Corp may support engagement with stakeholders seeking responsible business practices across the company [19, 20]. Their practical value depends on whether those credentials are relevant to the audience’s requirements and considered in its decisions.
Organisations may therefore adopt multiple sustainability tools to address different business needs, stakeholder expectations and assessment requirements. A customer’s procurement assessment, an investor’s risk analysis and a project certification address different decisions. The coordination question is which underlying information can be shared across them, while retaining the additional evidence each requires.
While sustainability ratings and certifications serve different purposes, engaging with multiple assessment schemes can also create practical challenges for organisations. WBCSD notes that companies navigating ESG ratings face challenges from divergent methodologies, data inconsistencies and duplication, which can introduce additional cost and complexity. It highlights that companies can benefit from focusing on robust, standardised sustainability data rather than managing separate processes for each individual ESG rating, helping to reduce unnecessary operational burden [25]. Similar pressures may arise when pursuing multiple certifications, particularly where separate schemes require overlapping documentation and evidence. This suggests a broader need to coordinate preparation across ratings and certifications so that common data and evidence can be used more efficiently across different requirements.
CDP’s mappings show that connections between disclosure requirements already exist. The next opportunity is to make these connections useful in companies’ day-to-day work. Organisations could reduce preparation time by reusing relevant data and supporting documents across sustainability assessments and reporting requirements.
A coordinated programme could help organisations identify applicable requirements, select relevant tools and organise supporting evidence. Sector-specific guidance could translate broad expectations into practical actions, while mappings could show which information can be reused and where additional evidence is needed. Bringing these functions together could support more informed decisions and reduce repeated preparation.
To remain useful, the programme would need to track changing regulatory and investor expectations and help teams turn assessment findings into improvement priorities. Its value should be demonstrated through accurate mappings, clear guidance and measurable reductions in duplicated work. Separate reporting, assessment and verification may still be required, but better preparation could free staff to act on findings rather than repeatedly assemble the same information.
Selecting the right sustainability standards, frameworks, ratings and certifications requires organisations to understand their distinct purposes and assess their relevance to business priorities, reporting obligations and stakeholder expectations. However, selecting the appropriate tools is only the first step. It is in the interest of organisations to adopt a coordinated approach in managing their requirements, streamlining assessment processes and translating findings into meaningful improvements in sustainability practices and performance.
A coordinated programme can help organisations navigate evolving sustainability requirements with greater clarity, make informed decisions and reduce duplicated effort. Ultimately, its value lies in freeing up time and resources to focus on what matters most: driving meaningful improvements in sustainability performance.
[1] Arkoh et al. Determinants of sustainability reporting: A systematic literature review. https://doi.org/10.1002/csr.2645
[2] Siew, R. Y. J. (2015). A review of corporate sustainability reporting tools (SRTs). Journal of Environmental Management, 164, 180–195. https://doi.org/10.1016/j.jenvman.2015.09.010
[3] GRI (2022). ESG standards, frameworks and everything in between.
[4] EcoVadis. Sustainability Certification, particularly “Sustainability Certification vs Rating”. EcoVadis
[5] Synesgy. ESG Certification vs Sustainability Certification: Which One Belongs in Your Strategy?
[6] Global Reporting Initiative (GRI). A Short Introduction to the GRI Standards.
[10] IFRS Foundation. Introduction to the ISSB and IFRS Sustainability Disclosure Standards.
[11] ACCA. IFRS Sustainability Disclosure Standards.
[12] IFRS Foundation. About the SASB Standards
[13] Partnership for Carbon Accounting Financials (PCAF). The Global GHG Accounting and Reporting Standard for the Financial Industry.
[14] PRI. Reporting and Insights . Getting started as a signatory
[15] United Nations. Transforming our world: the 2030 Agenda for Sustainable Development. sdgs.un.org
[16] CDP. Understand your score as a disclosing company
[17] EcoVadis. Understanding medals and badges
[18] MSCI. ESG Ratings
[19] B Lab. About B Corp Certification
[20] GreenCircle Certified. Product certifications and Operations certifications.
[21] USGBC. LEED rating system
[22] EcoVadis. How can I use my EcoVadis assessment results?.
[23] EcoVadis. How will requesting companies use my EcoVadis Scorecard results?
[24] CDP. Alignment with Disclosure Frameworks and Standards
[25] WBCSD. ESG ratings: friend or foe?
