Most companies are juggling two or three of these at once without a clear map of which one is mandatory, which one is a stakeholder expectation, and which one is a nice-to-have. Here's the difference, in one table.
| Framework | Mandatory or voluntary | Who it applies to | What makes it distinct | Official source |
|---|---|---|---|---|
| BRSR |
Mandatory in India | Top 1,000 listed companies by market cap (SEBI-mandated) | Nine-principle structure; BRSR Core subset carries a phased external assurance requirement | SEBI circular ↗ |
| GRI |
Voluntary | Any organisation, any sector, any geography | The most widely recognised global baseline, often used to translate BRSR data for international audiences | globalreporting.org ↗ |
| TCFD → ISSB |
Disbanded Oct 2023; recommendations now sit inside ISSB standards | Investors, lenders, and any company reporting climate financial risk | The four-pillar structure, governance, strategy, risk management, metrics & targets, still underpins most modern climate disclosure, including IFRS S2 | ifrs.org (ISSB) ↗ |
| ESRS |
Mandatory under EU CSRD, for companies within scope | EU-listed companies and non-EU companies above EU revenue/presence thresholds, thresholds are currently being revised upward under the EU's Omnibus simplification package, so confirm the current figure rather than relying on a number here | Requires "double materiality", impact on the company's finances, and the company's impact on people and planet | European Commission ↗ |
| SDGs |
Voluntary (aspirational) | Governments, NGOs, and companies choosing to align reporting narratives | Not a disclosure standard, a shared vocabulary for connecting programme outcomes to a global goal (most relevant here: SDG 3 and SDG 13) | sdgs.un.org ↗ |
| SASB |
Voluntary; industry-specific metrics now referenced inside ISSB standards | Companies wanting sector-specific, investor-focused metrics | Consolidated into the IFRS Foundation in 2022, SASB no longer operates as a standalone body, but its industry metrics live on inside IFRS S1 | ifrs.org ↗ |
| CDP |
Voluntary, but frequently required by investors and large customers | Companies responding to investor or supply-chain disclosure requests | A questionnaire-based disclosure system, not a standard-setter, scores companies annually on climate, water and forests data | cdp.net ↗ |
Click on any framework name above to go deeper, each one links to a dedicated page covering its structure, mechanics, and how it relates to the others.
The mandatory framework decides your deadline. The voluntary ones decide your credibility.
If you only have to satisfy one regulator, start there and treat the rest as translation layers, not separate projects. Most of the CSR budget conversations we sit in on are really BRSR conversations wearing a GRI vocabulary because that's the language the sustainability team learned first.
Same information as the table above, written out in full, with a direct link to primary source documentation for each, not a summary of a summary.
None of the seven frameworks above are mandatory globally by accident, they trace back to a specific COP decision. If you want the full thirty-year history in one table, plus the 2030/2047/2050/2070 targets everyone quotes, that's a dedicated page.
See the full COP history & global targetsBRSR: Business Responsibility and Sustainability Report · GRI: Global Reporting Initiative · TCFD: Task Force on Climate-related Financial Disclosures · ISSB: International Sustainability Standards Board · ESRS: European Sustainability Reporting Standards · CSRD: Corporate Sustainability Reporting Directive · SDG: Sustainable Development Goals · SASB: Sustainability Accounting Standards Board · CDP: Carbon Disclosure Project (now known simply as CDP) · COP: Conference of the Parties · ESG: Environmental, Social and Governance
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Reading the standard is step one. Knowing your own exposure is step two.
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Peer-benchmarked against FY2024-25 BRSR disclosures from 59 listed Indian companies.