Fastly has delivered on the 100% renewable electricity commitment it made last September, covering every non-renewable megawatt-hour consumed by its equipment across its global network of Points of Presence and its offices with Environmental Attribute Certificates. The company reported the milestone in its 2025 Sustainability Report, where it said the move cut its market-based Scope 1 and 2 emissions by 94% year-over-year. Total market-based emissions across Scopes 1, 2 and 3 fell 3%.
The report marks the first time Fastly has published its carbon intensity, a measure of emissions per dollar of revenue. The figure is declining as revenue grows faster than emissions, the company said. Fastly also obtained two forms of third-party assurance on its reported data with Apex Companies, LLC. A significant portion of its 2025 greenhouse gas inventory, covering Scope 1, Scope 2 and Scope 3 categories 3 and 8, now carries independent limited assurance. The sustainability dashboard Fastly launched last September, which gives customers daily-refreshed visibility into their own electricity use and emissions, also received independent validation.
The hardest part remains the value chain. Fastly’s market-based Scope 3 emissions, which cover its wider value chain and hold the bulk of its footprint, rose 13% in 2025. The company said addressing those emissions is the most difficult stretch and where it is focused. It completed its first supplier-level mapping of Scope 3 emissions to inform a supplier engagement strategy, and it continues to develop emission reduction plans centered on electricity, its supply chain and business travel as foundations for a future climate target.
Fastly tied its sustainability work to the energy demands of AI. It argues that processing workloads at the edge, closer to users, rather than routing everything to centralized models, is one of the more concrete ways its platform can help mitigate the energy cost of AI’s growth. Internally, its AI policy acknowledges the environmental impact of AI use and encourages employees to use the simplest model suited to a given task. The policy also sets expectations on which information may be used with which tools, restrictions on prohibited use cases, and requirements for human review of AI-generated output.
Beyond carbon, Fastly said its Fast Forward program provided more than $16 million in in-kind support in 2025 to open source projects and nonprofits, including Watch Duty, which relied on Fastly to stay up with zero downtime while serving 10 million monthly users during January’s Los Angeles wildfires. The company also hosted its inaugural Community Tech Day with the Boys & Girls Club of San Francisco, bringing high school students to its headquarters for an introduction to technology careers.
Fastly described the report as a mile marker rather than a finish line. It said it has delivered its renewable commitment, lowered market-based emissions and carbon intensity, and added two independent checks on its numbers, while acknowledging that the value-chain reductions and a formal climate target remain unfinished. The company included forward-looking statements warning that its sustainability plans, targets and commitments, and the ability of its products to mitigate energy costs associated with AI, carry risks including the evolving nature of sustainability disclosure frameworks, reliance on third-party data, and the sustainability performance of suppliers and partners.
