with the planet
into climate action
Enable high-impact
climate solutions



We want to activate more climate action. For this, we bring more private capital directly to high-quality nature-based climate projects, through a data-driven, science-backed, and regulated framework.

Learn how Callirius
can provide you with impactful carbon credits and climate investments.
Invest in climate solutions
You can invest in climate solutions which have positive social and environmental impact.
Support local projects
Financing local projects boosts healthy ecosystems and a sustainable development of local communities.
Accelerate your decarbonisation journey
Reducing your carbon footprint is the first step in becoming a climate neutral business. Carbon credits help you counterbalance unabated emissions.
Enable the 1.5°C pathway
Your investments can make climate solutions financially viable. Helping us reach the goals of the Paris Climate Agreement.

Learn how Callirius

can market your climate project.
Get funding for your project
If you’re looking to fund your high-impact climate project, Callirius is the marketplace for you.
Sell on a transparent platform
Tired of hidden fees and questionable effectiveness? Callirius is the platform for transparent climate projects.
Benefit from fairer prices…
We aim to couple levels of impact with levels of revenue. Better for the planet and for your margins.
...and lower fees
At Callirius, we aim to reduce the carbon market value chain and keep only value-adding participants. You won’t pay extra fees to fund your projects.

Why Callirius

High Integrity & Impact

All offered nature-based projects are pre-filtered by our Quality-AI and manually screened by our expert team to ensure integrity, passing strict evaluation criteria. Not only at inception, but continuously thereby ensuring maximum climate impact & minimising risk.

Transparent & Accessible

We ensure full transparency on all of our solutions, removing hidden pricing and terms. We work directly with project developers so you only pay for value-adding services. You finance high-impact climate projects, cost-effectively.

Local & Inclusive

Our selected climate projects create true local impact by focusing on solutions that strengthen the local biosphere and communities. We work exclusively with projects which guarantee a net positive impact on the environment & biodiversity, social justice, and human rights. ​

The founding team

CEO & Chairman

Ebrahim Attarzadeh

Head of Distribution

Rudolf Maier

Head of Project & Policy

Michael Grohmann

Head of Product & Technology

Tim Schuldt


What you do makes a difference, and you have to decide what kind of difference you want to make.

Dr. Jane Goodall

Partner with the planet. Take climate action with Callirius.

Carbon removal can be overwhelming. Callirius is here to help you.