Hexa partners with Sirona Technologies and Agendi to secure permanent carbon removals through Direct Air Capture

Hexa is the first startup studio to purchase Direct Air Capture carbon credits marking a pioneering step in climate leadership within the startup ecosystem. The credits are sourced from Sirona Technologies, with Agendi advising on procurement strategy and designing their carbon credit portfolio. By partnering with visionary companies like Sirona Technologies, Hexa accelerates the scale-up of permanent carbon removal infrastructure. It also enables Hexa to take care of their residual emissions on a science-based approach, complementary to a portfolio of nature-based solutions provided by Agendi.

This partnership reflects a growing shift of the tech sector towards real climate impact through permanent carbon removal.

Quentin Nickmans, Co-Founder of Hexa says “At Hexa, we’re building the next generation of tech companies and we believe that innovation shouldn’t come at the expense of the planet. We’re committed to align with science-based climate neutralization. We’re proud to back climate entrepreneurs like Sirona Technologies, whose Direct Air Capture credits meet the highest standards of permanent and verifiable carbon removal.”

Arnaud Brohé, Founder of Agendi: “This partnership reflects the next chapter of climate leadership: a move towards permanent, science-backed removals. At Agendi, we worked closely with Hexa to structure a procurement strategy grounded in durability, verifiability, and measurability. Direct Air Capture is increasingly becoming a key strategic component for companies with net zero ambitions.”

Thoralf Gutierrez, Co-Founder of Sirona Technologies “At Sirona, we demonstrated that we can be a reliable partner for companies willing to neutralize their residual emissions. We have an operational pilot plant, launching our commercial plant this year and deploy DAC with a credible scalability pathway. This partnership with Hexa and Agendi demonstrates that companies from all sectors can play a meaningful role in scaling durable climate solutions.”

About Hexa

Founded in 2011 as eFounders by Thibaud Elziere, Quentin Nickmans and Amaury Sepulchre, Hexa is Europe’s leading startup studio that empowers entrepreneurs to build and scale highly ambitious companies. Hexa operates in a wide range of areas, from AI to longevity care and open source. Since its launch, Hexa has successfully built and scaled over 50 companies, with a combined valuation of near $5B. Some notable successes include Aircall, Spendesk, Front, Swan and Yousign.

Learn more at www.hexa.com

About Sirona

Sirona Technologies develops and operates Direct Air Capture modules that permanently remove CO₂ from the atmosphere and securely store it underground. Sirona Technologies provides the highest credibility carbon credits. With its pilot plant operational since January 2025, Sirona became the worlds fastest DAC company to deploy a pilot plant on site. Sirona is also one of the very few actors offering DAC credits on the market as of 2025. Sirona Technologies, has already credits available across 2025, 2026, and beyond.

About Agendi

Agendi is a specialist climate and sustainability consulting firm with a global presence, serving large organizations across North America, the UK and Europe. Agendi provides advisory and procurement services focused on carbon credits, Energy Attribute Certificates (EACs), and other environmental credits. The firm supports clients in evaluating and selecting credits that meet recognized international standards, assessing project quality, and structuring long-term credit procurement strategies.

Learn more at https://agendi.co