William ten Zijthoff
Meet William
Entrepreneur
Assen, Netherlands
William ten Zijthoff is a climate tech entrepreneur, carbon market expert, and public speaker dedicated to reshaping the voluntary carbon market with transparency and impact. As Co-Founder of Carbify, he pioneers Carbon Debits — a blockchain-verified, science-backed alternative to carbon credits — under the Global Carbon Standard. William also serves as a UNFCCC Article 6.4 expert, contributing to international carbon market frameworks that align with the Paris Agreement. His work bridges nature-based solutions, climate policy, and technology to drive real, measurable environmental change.
Areas of activity:
Reforestation / Rewilding
About:
William ten Zijthoff is a leading voice in the climate tech and carbon finance ecosystem. As a UNFCCC Article 6.4 Mechanism Expert, climate entrepreneur, and co-founder of Carbify, he is driving a new paradigm in climate mitigation — one that prioritizes verifiable action, integrity, and innovation.
At Carbify, William leads the development of Carbon Debits: a scientifically validated, blockchain-registered alternative to traditional carbon credits. Backed by the Global Carbon Standard (GCS), this model enables real-time traceability of CO₂ sequestration through afforestation and other nature-based solutions. Carbify’s projects in regions such as Brazil and Angola combine satellite monitoring, smart contracts, and community partnerships to ensure that every kilogram of CO₂ removed is verifiable and aligned with biodiversity and SDG goals.
Beyond entrepreneurship, William is an official expert for the United Nations Framework Convention on Climate Change (UNFCCC), where he contributes to the evolution of Article 6.4 — a core mechanism of the Paris Agreement designed to enable international collaboration on carbon mitigation. His work includes evaluating methodologies, ensuring alignment with the SDGs, and advising on monitoring, reporting, and verification (MRV) systems.
Previously, William served as CEO and methodology architect at Coorest, where he developed tokenized systems for carbon removal. With a strong background in operations and business development, including roles at ALDI Nederlandand NLAI, he brings practical leadership experience and a commitment to building scalable solutions with both economic and ecological value.
Known for his thought leadership and public speaking, William is a passionate advocate for radical transparency in climate finance, working with governments, NGOs, and enterprises to reimagine how impact is measured and monetized.
“Real climate action starts with radical transparency. Let’s build it.”
Involvement:
Carbify
Tree planting solutions for every sector.
Tailored for various industries, our tree-planting solutions empower institutions, businesses, and individuals to take measurable action toward sustainability while tracking their impact in real-time.