How climate tech company Patch works to build integrity of carbon markets

Welcome to the latest episode in the Terra Carta Series of the All Things Sustainable podcast, a collaboration with the Sustainable Markets Initiative. Throughout 2025, we’ll be interviewing SMI member CEOs across industries and around the world about how they’re approaching sustainability challenges and opportunities.  

In this episode, we’re talking with Brennan Spellacy, founder and CEO of Patch, a climate technology company that helps companies manage, sell and buy carbon credits. Brennan says interest in carbon markets is growing as a tool for companies to achieve their climate targets, even amid a challenging current environment. 

"Even though the tactics might evolve in the short term, almost every [Chief Sustainability Officer] that I've seen is upping their investments in 2025 and 2026, not cutting them. But how you deploy and how you talk about that deployment is going to obviously evolve," Brennan says. 

He outlines how Patch works to drive the integrity of carbon markets by providing companies with a universal framework for evaluating projects across a wide range of technologies on an apples-to-apples basis. 

"The core theory of change at Patch is that it's incredibly difficult to understand this market," Brennan says. "And the way we're going to drive scaling within this ecosystem today is to remove the friction to understanding." 

About the Terra Carta Podcast Series: The SMI is a network of over 250 global CEOs across finance and industry. It facilitates private sector diplomacy with the ambition of making sustainability the driving force of global markets and value creation. S&P Global is a proud SMI member. 

We’re calling this the Terra Carta Series based on the SMI’s Terra Carta mandate. This is the guiding mandate for the SMI and sets out ambitious and practical actions to help the private sector accelerate progress toward a sustainable future. The name Terra Carta is a play on the historic Magna Carta.  

Learn more about the S&P Global Sustainable1 Summit in Singapore June 26, 2025. 

Listen to our first episode in the Terra Carta series featuring Sustainable Markets Initiative CEO Jennifer Jordan-Saifi.  

Listen to our podcast episode about what’s ahead for carbon markets.  

Learn about the S&P Global Sustianable1's Energy Transition data. 

This piece was published by S&P Global Sustainable1 and not by S&P Global Ratings, which is a separately managed division of S&P Global.    

Copyright ©2025 by S&P Global           

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