
Bringing carbon accountants together for collective impact
Who we are
We bring together carbon accounting professionals who measure and report carbon emissions, which includes software companies, consultancies, auditors, in-house sustainability managers, standards bodies and independent professionals. We collaborate on solving challenges faced by our industry, share best practice and promote the development of robust standards.
The alliance in numbers
600+ Members
More than 600 companies of all sizes have joined, headquartered in 50+ countries.*
100K+ Companies Measured
We have collectively measured the carbon footprints of over 100,000 organisations.*
>1.1BN tCO2e Measured
We have collectively measured** more than 1 billion tonnes of CO2e with our clients.*
>29.1m tCO2e Reduced
We have measured** 29+ million tonnes of direct CO2e reductions achieved (no offsets).*
*These figures are estimates based on information provided by CAA Members. Not all have shared figures for every measure and reporting periods and boundaries vary.
**Currently only includes 45 CAA members
Some of our members
Member-Only Community Platform
If you, or your organisation, are already a CAA Member, then you can access our exclusive Community Platform for Members to access all of our resources, discussions, working groups and events. If you are not yet a Member, please apply first.