Microsoft scores 18 points higher than Amazon on SINK's sustainability index.
Microsoft is more sustainable according to SINK's open sustainability index, scoring 43/100 vs Amazon's 25/100 — a difference of 18 points.
Amazon scores 25/100 on the SINK sustainability index (Significant gaps). Amazon's 29/100 score reflects a company with credible renewable energy matching but crippled by removed SBTi validation, rising absolute emissions (+34.5% since 2019), unverified supply chain reporting, and active greenwashing litigation. The gap between Climate Pledge rhetoric and delivery is structural.
Microsoft scores 43/100 on the SINK sustainability index (Below expectations). Microsoft reports comprehensive emissions data with third-party verification, but absolute emissions rose 23.4% since 2020 baseline despite 71% revenue growth. Heavy reliance on carbon removal credits, annual renewable matching that masks hourly grid reality, and membership in climate-obstructing trade associations undermine net-zero credibility.
Both companies are rated on the same 10-question SINK rubric: Scope 1/2/3 carbon footprint, energy source, nature and biodiversity, resource use, water, emissions trajectory, science-based targets, transparency, and controversies. Scores are 0–100, based on public data, and fully reproducible.
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