CarbonSquare builds credible, 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 are 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 number still works when a funder or an auditor asks about it.
An Amsterdam circular food startup needed a measurable impact claim 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 knew I needed more strong stance on this while having conversations, then I found CarbonSquare. With real numbers, my startup sparks real interest from investors and clients, because I can finally show what I'm actually achieving.
Our stakeholders were starting to ask about our environmental impact. Çağla understood how our operations work, she showed me the assumptions behind each logic and we chose to go with the most conservative method. The whole model was finished less than three weeks, not the months a full LCA would take from us. I use our impact number now in investor and partner conversations.
A short call is enough to see whether your impact story can be made defensible, and what it would take.