01Measurement
Measure and report
web, cloud and AI emissions.
Understand the impact of your digital services with evidence-led sustainability reports from the team helping define global standards.
We measure digital emissionsfor purpose-led orgs
Bring your web, cloud and AI impacts in line with your sustainability goals. With evidence-led reporting and low-carbon hosting.
How We Help
Want to understand and improve your digital emissions?
Whether you have a single website, a whole web estate or cloud services, or want to understand your AI usage, we help in two ways.
02Cloud & Web Hosting
Host sustainable websites
and cloud apps.
A fully-fledged PaaS platform for modern developer workflows, with native energy and emissions measurement to track improvement over time.
Why Root & Branch
Science & StandardsBuilt into everything we do.
Our co-founders help shape the industry standards for measuring digital emissions and co-chair a UK government working group on digital sustainability. That work, alongside our published research, underpins the evidence in our reports and the measurement built into our cloud platform.
Software Carbon Intensity
ISO/IEC 21031:2024
We contribute to the Green Software Foundation's SCI for Web work, which builds on the Software Carbon Intensity methodology in ISO/IEC 21031:2024.
View the standardWeb Standards
W3C Invited Experts
Adam and Oli are W3C Invited Experts on the Web Sustainability Guidelines, which give practical guidance on reducing the environmental impact of websites.
Read the guidelinesResearch
Open methodologies
We began with Innovate UK-funded research into the energy use of software processes. Our measurement methodologies are published openly, so you can examine the evidence and check our working.
Explore the researchUK Government
GDSA working group
We co-chair the Government Digital Sustainability Alliance working group on embedding digital sustainability across UK government.
Government Digital Sustainability AllianceGet in touch
Let's talk about your digital emissions.
Tell us what you're looking to understand or improve, and we'll be in touch.