CarbonSquare builds defensible, fundable environmental impact assessments for climate and circular startups — grounded in real data, and never inflated.
Whether you need the figure built for you, or your startups taught to build their own — the method, and the rigor behind it, is the same.
We build your number for you.
A screening-level avoided-emissions model — sourced, cross-checked, and honest about what it does and doesn't count. The defensible figure you can put in front of investors, partners, and grant bodies.
See it in action →We teach your startups to build their own.
A working session where founders build their own credible impact number — one they can defend to investors, partners, and public funders — taught through two real case studies across food and fashion.
Talk about a workshop →Most impact figures look fine until someone asks how they were built. Ours are built to answer that question.
Every number traces back to an official database or a peer-reviewed study — ADEME, CE Delft, published LCA data. Nothing is a guess we couldn't defend.
We only count a saving when the alternative was real. If the emissions were never going to happen, they don't go in the total — no matter how good they'd look.
Every result is validated against published ranges. If it sits outside the evidence, we revise it — so the figure holds under a funder's or auditor's questioning.
An Amsterdam circular food startup needed measurable ESG impact it could stand behind — not a number that collapses under due diligence. We built a screening-level model, sourced and cross-checked end to end.
Read the case study →
Environmental scientist and climate-tech builder based in Amsterdam. Two climate startups, a Master's in Environmental Science, and one stubborn question about waste later, CarbonSquare is where my science background and startup experience finally come together.
Read my story →
"Impact without assessment and real data to share is not impactful as it can be." I always said this to myself and yet always postponed my measurements. And then I found CarbonSquare and I realized that with real numbers and data my startup can spark real interest to investors and clients due to the capacity of visualising what I am actually achieving with my impact actions. And I would never go back.
A short call is enough to see whether your impact story can be made defensible — and what it would take.