Microsoft scores 16 points higher than Amazon.com on SINK's sustainability index.
Microsoft is more sustainable according to SINK's open sustainability index, scoring 43/100 vs Amazon.com's 27/100 — a difference of 16 points.
Amazon.com scores 27/100 on the SINK sustainability index (Significant gaps). Amazon reports comprehensive climate data but absolute emissions rose 34% since 2019 despite renewable energy claims. Scope 3 excludes third-party marketplace products, water disclosure was deliberately suppressed, and the company lost its science-based targets credential. A 2025 greenwashing lawsuit over deforestation-linked paper products exemplifies the gap between marketing and supply chain reality.
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 despite renewable energy claims. The company relies heavily on carbon removal credits to offset rising Scope 3 emissions, faces greenwashing accusations for marketing AI to fossil fuel companies while sponsoring climate events, and maintains trade association memberships actively opposing climate policy.
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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