Scope3

First-mover and category leader in programmatic advertising carbon emissions measurement and reduction

Scope3 is a collaborative sustainability platform purpose-built for the digital advertising industry. Founded by Brian O'Kelley, a pioneer in programmatic advertising, Scope3 provides granular carbon emissions data across the entire programmatic supply chain — from creative rendering to data center energy consumption. The platform enables advertisers, agencies, DSPs, and SSPs to understand, report on, and actively reduce the environmental impact of their media buying activities. Scope3's emissions modeling is built on a combination of proprietary data collection, industry partnerships, and scientific methodologies aligned with global carbon accounting standards. Scope3 has established itself as the de facto standard for carbon measurement in digital advertising, partnering with major players across the ecosystem including The Trade Desk, Google, Magnite, Pubmatic, IPG, GroupM, and others. Its data is embedded directly into ad buying workflows, allowing buyers to filter inventory by emissions intensity and make greener media decisions without sacrificing performance. The company also offers 'Green Media Products' (GMPs) in partnership with publishers and SSPs, enabling advertisers to purchase pre-vetted, lower-emission inventory at scale. As ESG reporting requirements tighten globally and brands face increasing pressure to demonstrate sustainability commitments, Scope3 occupies a unique and strategically important position in the AdTech ecosystem. The company is not just a measurement tool but is actively shaping industry standards around sustainable advertising, working with bodies like Ad Net Zero and the Global Alliance for Responsible Media (GARM). Its first-mover advantage, deep integrations, and founder credibility give it a strong moat in an emerging but rapidly growing category.