Get a free audit of your current site
Speed, weight and CO₂ of your homepage, plus the five things we would fix first, in writing within 24 hours.
Demo builds, measured live
Leavsy is a new studio. To show the approach, we built three small-business sites from scratch and measured them with the same meter as on the homepage. Client work will appear here as it ships.
Levain
demoArtisan bakery · Lisbon
98/100 mobile · carbon A+ · 0.085g CO₂ · 1.8s to first content
Open the live demo →
Halden & Roe
demoCommercial law firm · Dublin
98/100 mobile · carbon A+ · 0.07g CO₂ · 1.8s to first content
Open the live demo →
Brightwire
demoElectrical services · Dublin
99/100 mobile · carbon A+ · 0.04g CO₂ · 1.5s to first content
Open the live demo →For comparison, the median web page weighs 2.3–2.7 MB (HTTP Archive Web Almanac 2024, mobile/desktop), which is roughly 0.8 g CO₂ per visit by the Sustainable Web Design model — the same maths as the meter on our homepage. Every build above is 9–20× lighter — each rated A+ for carbon at 98–100/100 performance.