Scope3 by Apostra

Pioneer and leading provider of carbon emissions measurement for the digital advertising supply chain, now operating as a product under Apostra

Scope3 is a carbon-emissions measurement product for the digital advertising industry, maintained under the Scope3 brand by its parent company Apostra — the entity formerly known as Scope3 that renamed itself Apostra in September 2026. The product enables advertisers, agencies, publishers, and ad tech platforms to measure, understand, and reduce the carbon footprint associated with programmatic advertising supply chains, providing granular emissions data at the impression level across the open web. The platform models emissions across the full digital advertising supply chain — including data centers, devices, and media — giving buyers and sellers actionable intelligence to make more sustainable media investments. It has been integrated by a range of demand-side platforms, supply-side platforms, and agency holding companies seeking to meet sustainability commitments and respond to growing regulatory and client pressure around environmental impact. As a product within Apostra's broader portfolio — which has pivoted toward AI agents for automated ad trading — Scope3 retains its identity as the industry's dedicated sustainability measurement layer for digital advertising, continuing to serve the market that the original company helped pioneer.