Sustainability assurance is the independent verification of a company’s sustainability claims and information, analogous to a financial audit but for environmental, social, and governance (ESG) performance. It builds trust with stakeholders by providing confidence that a company’s sustainability disclosures are credible and accurate, moving beyond mere claims to verifiable actions. This process involves a systematic evaluation by an independent third party, often using established standards, to ensure the reported information is reliable for decision-making by investors, customers, and other interested parties

Assuring of information in sustainability and integrated reports is becoming more widespread. ESS provides assurance and expert review services, based on the AA1000AS standard.

ESS is an internationally licensed sustainability assurance provider for AccountAbility.