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CleanTechies

CleanTechies
Author: Silas & Somil
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© 2025 CleanTechies
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Welcome to the CleanTechies Podcast, the #1 Podcast for Climate Tech Entrepreneurs
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Support the show more directly via our Substack where we also publish writing on the episodes we record. https://cleantechies.substack.com/subscribe
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233 Episodes
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Hello everyone and welcome back to CleanTechies the Podcast. This is episode 51. ________ If you are a climate tech founder with specific questions you'd like us to ask -- OR -- looking for capital and strategic partner introductions, please reach out to me via the Slack Channel or LinkedIn and we are glad to help in any way we can. ________ Today's conversation is with Demian Klenk, Co-Founder of 6c-Index, where they are building an index fund of Carbon projects that are tied to...
Hey Everyone! We're excited to share two big announcements. 🚨🚨 First, CleanTechies is doing its first-ever live podcast! 🎙️🎊 We are partnering with Extantia, one of THE leading ClimateTech VCs in Europe, to do our first ever live podcast recording. 🎉 When: Wednesday, Sep. 25th @ 4 pm Sharp (be early)Where: Register for addressRegister for 1 of 15 CleanTechies tickets here: https://lu.ma/n8gteqtmSecond, we are hosting a soccer game for CleanTechies ⚽ When: Friday, Sep. 27th @ 5:30 pmWhere: Nea...
🌎 NYCW was a pivotal moment for many of us current or aspiring climate professionals. It brought together large swaths of diverse talent, all working in different assets to solve the climate crisis. Many of these gatherings were headlined by some of the smartest minds in climate and climate tech. An implicit goal we’ve had at the CleanTechies Podcast since then is to have as many speakers from the week as we can. I’m excited to introduce the speaker of one of the most popular talks at NYCW an...
Yuval Bachar, Founder and CEO of Edge CloudLink (ECL), is on a mission to revolutionize data centers with hydrogen-powered, off-grid solutions. His journey spans decades, with leadership roles at Cisco, Facebook, and LinkedIn, where he built critical infrastructure for some of the biggest names in tech. Now, he’s pioneering a new wave of sustainable data centers, delivering AI-ready capacity in just nine months—compared to the industry average of three to four years. Here’s the game-changer: ...
In This Episode We are speaking with Nada Ahmed and Jason Ethier, two of the founding partners at Energy Tech Nexus. Energy Tech Nexus is a Houston-based hub designed to connect EnergyTech startups with the resources they need to grow. This includes access to capital, corporate partners, direct access to pilot opportunities, as well as a community of other founders doing the same thing. In this episode, we dive into **how they're building an innovation powerhouse in the heart of the U....
In This Episode In today’s episode of CleanTechies, we’re joined by Anca Timofte, the CEO and Founder of Holocene, a direct air capture (DAC) company revolutionizing carbon removal through a continuous-loop liquid system. With over a decade of experience in carbon capture—including being one of the first employees at Climeworks—Anca offers unparalleled insight into the challenges and opportunities of building climate solutions. Anca walks us through: **How Holocene's low-temp carbon capture s...
Jane Melia is the CEO and Co-Founder of Harvest Thermal, revolutionizing home heating with heat batteries. Jane’s journey began with a vision to make home electrification both cost-effective and climate-friendly. Harvest Thermal has developed a patented system that combines heat pumps with thermal storage, reducing household emissions by 90% and energy bills by 30%, all while providing unparalleled comfort. Here’s the kicker: Jane and her team have successfully navigated the challenges of har...
Martin Freimüller, the CEO and Co-Founder of Octavia Carbon, a cutting-edge Direct Air Capture (DAC) company based in Kenya Martin’s journey began with a deep appreciation for Africa’s potential and the realization that Kenya, with its abundant geothermal energy and skilled talent pool, is the perfect location for DAC. In just two and a half years, Octavia Carbon has developed patented technology, grown to a team of 61 (40 of them engineers), and even built Kenya’s first DAC pilot facility. H...
On today’s episode, we’re speaking with Martin Schichtel, the CEO and Founder of Kraftblock, a thermal energy storage solution for industrial clients that use high heat. Today, they’re delivering their 5th project. All of which have been paid for by their customers — yep, you read that right. They have not used equity to pay for these pilot and demonstration projects. Their tech takes excess heat or electricity and turns it into heat, stores it in these engineered rocks. When dema...
Joshua Posamentier is the co-founder and managing partner at Congruent Ventures, an early-stage venture capital fund focused exclusively on climate tech. With a background in physics and a career that began in the semiconductor industry, Josh transitioned into climate investing after holding various roles at Intel and Prelude Ventures. Widely regarded as an OG in the climate tech space, Josh has been investing in climate solutions since well before the current wave of interest, making him one...
Our reflections and musings as we close out the year... Topics 01:28 2024's Top CleanTechies Episodes 07:37 Insights 12:49 Reflections on Branding and Storytelling 20:22 Milestones and Achievements in 2024 26:12 Key Lessons for Climate Tech Startups 34:59 Future Outlook Support the show Every ClimateTech Entrepreneur needs a reliable partner for their legal needs. Why settle for less than the best? 💪🏽 Reach out to Goodwin Law today; the law firm of choice for hundreds of ClimateTech Entrep...
Julia Kumari Drapkin is the CEO and founder of ISeeChange, a data platform that combines resident-generated insights with AI to address climate adaptation challenges. Julia’s background as a climate science reporter, covering disasters like Hurricane Katrina, inspired her to bridge the gap between people’s lived experiences and actionable climate solutions. Her expertise in storytelling and data-driven insights shapes ISeeChange's people-first approach to building climate resilience.ISeeChang...
Learn how this carbon capture startup also produces green chemicals AND hydrogen -- how they funded their first demo plant -- their secrets to building a resilient business model -- and what he would advise Trump's admin in order to help keep climate on track while also competing with China. Listen Time: Full Show 58:31 (no ads) | Free Preview 37:14 On today’s episode, Owen Cadwalader, the COO of Travertine, delivers one of the most value-dense episodes we’ve ever released. Hear h...
Hear the story of how Sila Nanotechnologies has successfully developed, taken to market, and scaled up a new Anode technology for the battery industry. -- Learn the importance of Job Creation in landing funding -- Understand why CleanTech is actually bi-partisan -- and Understand where the puck is going with the battery industry. Listen Time: Full Show 1:09:26 (no ads) | Free Preview 41:27 On today’s episode, Gleb Yushin, the CTO of Sila Nanotechnologies, pours out the wisdom he has from 14...
Nate Loewentheil is the founder and managing partner of Commonweal Ventures, an early-stage venture capital firm focused on solving America's biggest challenges through entrepreneurship. Nate’s career spans angel investing, politics, and public policy. Previously, he served in the Obama White House, advising President Obama on emerging technologies such as clean energy and broadband expansion. His background includes roles in the Yale Entrepreneurial Society, founding the Roosevelt Institutio...
Hear the CEO of Skytree explain how you MUST build for scale to achieve impact in a timely manner -- how O&G have been releasing their captured Co2 for years -- why their biggest investor is a huge Greenhouse Operator -- the importance of co-locating your carbon capture tech with the demand -- his journey into climate -- and a few more hot takes. Listen Time: Full Show 57:04 (no ads) | Free Preview 41:09 On today’s episode, Rob van Straten, the CEO of Skytree captures our attenti...
Amy Duffuor is a co-founder and General Partner at Azolla Ventures and Managing Director at Prime Impact Fund, Azolla's predecessor vehicle. She has a diverse background that spans immigration research, management consulting, impact investing, and renewables investment banking. Amy began her career studying marginalized West African migrants and later pursued an MPhil in Migration Studies at Oxford University. Transitioning into management consulting, she worked on supply chain and procuremen...
Listen Time: Full Show 38:51 (no ads) | Free Preview 31:19 Today, we are speaking with Shaun Abrahamson from Third Sphere. Third Sphere is a leading ClimateTech investor that also has a debt strategy for high-volume production startups in the hardware space. They have backed companies like ChargeLab, ClimateBase, Gradient, OneWheel, Therma, Revivn, & Wasted (check out the episode we did with Revivn). This is Shaun’s third time on the pod — if this is your first time hearing h...
There’s no sugarcoating it…Trump is bad news for ClimateTech — but thankfully, we have interviewed 200+ ClimateTech Entrepreneurs on how to build politically resilient companies — ensuring the future is greener no matter who the president is. Today, we’re distilling those key lessons for you. Key risks across / what’s on the chopping block Possible silver linings & some wins Recognizing the reality of the situation Examples of likely downside Choose a new n...
Today we are joined by Duncan Logan, CEO & Co-Founder of 9Zero. A community platform to bring climate professionals together in person and online so we can work together to solve the climate crisis. Duncan previously founded RocketSpace where he saw many tech startups that would go on to become unicorns. Companies like Uber, FlexPort, and Spotify. Having this experience made him realize the importance of creating a hub for people to collaborate and bump into each other. They a...
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