Everimpact is a startup fighting climate change with innovative solutions that can scale. Our vision is a planet where global warming is under control. Our mission is to make it easier for cities and companies to measure greenhouse gas emissions, identify opportunities to reduce emissions and finance needed investments.

Our Story

80 years of cumulated experience in the United Nations.

The three founders of Everimpact have experienced first-hand the fragility of our planet by working in and with all countries of the world.  Managing complex projects on the most challenging global issues, we had to be innovative and committed to make a difference where it matters, for the people that need it the most. 

From experiencing war, food, health, flood, drought crisis, it struck us the most how climate change was often and increasingly the overarching and most pressing issue. Our insights into those challenges made us realise the urgency to tackle climate change.

We are now on a mission to bring the most comprehensive data and analysis about greenhouse gas emissions to help solve this most pressing global challenge.

There is no Planet B. Act now. Join us.


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Mathieu Carlier

CEO & Founder

Mathieu has two decades of experience delivering complex multi-million dollars projects for the UN, EU, Gates Foundation, governments, and large companies in international development. 


His experience in deploying complex data systems for Presidential and Legislative Elections, or health ministries in over 50 war-zone or post-conflict countries has provided him with a unique vision of the most pressing global development challenges faced by many countries, and how to solve them with innovative solutions. 

He is now keen to make Everimpact the climate solution that helps cities and companies tackle climate change.


Alain Retière

CTO & Co-Founder

With three decades of field experience in sustainable development in more than 120 countries, he is the former director of 2 UN satellite agencies. 


From 2008 until 2011, he managed CLIMSAT, the UNDP scientific and technical service platform dedicated to assisting sub-national climate change adaptation and mitigation planning. Prior to that he initiated and led for 10 years UNOSAT, the UN emergency satellite service, for which he received in 2005 the UN21 Award from Secretary-General Kofi Annan. 

Alain is a climate change expert, agro-ecologist and senior scientific adviser to various sustainable development organizations.


Jan Mattsson

Chairman & Co-Founder

With four decades of experience with development, humanitarian and peacekeeping operations, he is the former UN Under-Secretary-General and Executive Director of UNOPS, an organization specialized in the implementation of development, humanitarian, and peace-building operations on behalf of multiple partners.

As a public leader and in more recent engagements with international organizations such as the World Bank, the Green Climate Fund, and the Museum for the United Nations - UN Live, Jan has continued to pursue his passion for sustainable development. Jan is keen for Everimpact to make a difference for the Planet and for our customers and partners.


Join the fight to tackle climate change.

We’re growing and looking for new talent to help us on our mission to tackle climate change. Join us if you’re inspired by helping cities and companies measure and reduce their greenhouse gas emissions. Let’s help them make our planet sustainable.