What it actually is
The Global Reporting Initiative is an independent international organisation, founded in 1997 and headquartered in Amsterdam, that has published the world's most widely used voluntary sustainability reporting standards since 2000. GRI is not a regulator, no government requires GRI reporting by law, but it functions as the closest thing sustainability reporting has to a common global language, used by organisations in more than 100 countries.
The three-tier structure
Universal Standards
Apply to every organisation, regardless of sector: reporting principles, organisational disclosures, and management approach.
Sector Standards
Sector-specific guidance, oil and gas, agriculture, mining, and a growing list of others, identifying the issues most likely to be material in that sector.
Topic Standards
Detailed disclosure requirements for specific topics, emissions, water, labour practices, anti-corruption, selected based on the organisation's own materiality assessment.
How a GRI report actually gets built
Organisation runs a materiality assessment to identify which topics matter most to its operations and stakeholders.
Relevant Topic Standards are selected based on that materiality outcome, alongside the mandatory Universal Standards.
Data is collected and disclosed against each selected standard's specific requirements.
Report is published, often alongside a GRI content index mapping each disclosure to its standard, for reader navigability.
Why companies use it alongside a mandatory framework
A company already filing BRSR in India often reports against GRI too, not because it has to, but because GRI is more likely to be recognised by an international investor, an overseas parent company, or a global NGO partner. GRI acts as a translation layer, the same underlying data, presented in a format a wider international audience already knows how to read.
Related in the Guide: GRI · Regulations & Standards Library
How GRI relates to other frameworks
GRI and ESRS share DNA, ESRS was built with GRI interoperability in mind, but ESRS is mandatory for companies in its scope and structured around double materiality, while GRI remains voluntary and single-materiality (impact-focused) by default.