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 i