Carbon accounting for everyone.

Sumday empowers businesses to accurately measure, understand and meaningfully reduce their carbon emissions with the help of an adviser they trust.

Sumday exists to bring the same rigor, transparency, and trust to environmental accounting that we expect from financial accounting. With the commercial and regulatory landscape now demanding it, companies and consumers want to know that those they buy from or invest in are sustainable. Companies need access to data they can rely on, to make informed investment and purchasing decisions.