EcoVadis vs. GMS

If you search for how to benchmark your brand’s sustainability performance against competitors, EcoVadis is very likely the name you will see first. It has earned that position: EcoVadis is a well-established, widely adopted rating built to assess a company’s own sustainability management system, its policies, its actions, and its results, verified against submitted documents and public-domain findings by a large in-house analyst team.

What it does not do is measure the public. EcoVadis rates what a company has documented about itself, primarily for use by corporate procurement teams qualifying their own suppliers. It is a B2B supply-chain instrument, not a read on consumer belief. A company can hold an excellent EcoVadis score, meaning its internal sustainability governance is well documented and well managed, while the public that buys its products still has no informed view of that company’s sustainability standing at all, or holds a view shaped by something else entirely.

That is a different question than the one most brands actually need answered: not “is our internal sustainability paperwork in order,” but “does the public believe what we say about ourselves, and is that belief moving people to buy, switch, or walk away.” Sustainability-driven consumer switching is projected to grow from $0.4-0.8 trillion in 2025 to $2.5-3.4 trillion by 2035 (see The $3 Trillion Switch); a supplier-audit score, however rigorous, was never designed to see that movement coming.

GMS measures the other side of that question. The Social Responsibility Score (SRS) is built from direct, ongoing consumer survey data, not documents a company submits about itself, drawn from the same Human Signals dataset behind roughly 100,000 monthly consumer interviews, with live benchmark coverage in the UK, US, and Australia and methodology deployable across 64 markets. A separate annual, sector-level diagnostic layer, 13 named drivers spanning environmental, social, and governance themes, supplements SRS to show exactly where a brand’s performance and importance sit on each dimension. A four-point improvement in SRS aligns with approximately a one percent increase in annual revenue, a direct link to commercial outcomes that a documentation-based score cannot offer, because it was never measuring commercial belief in the first place.

The two are not competitors so much as adjacent measurements of different things. A brand serious about its supply chain should still want a strong EcoVadis rating. A brand that wants to know whether the public actually believes its sustainability story, and whether that belief is protecting or costing it revenue, needs the other measurement: direct evidence of Social License to Operate, tracked continuously, calibrated against real switching behaviour.