Carbon Removal

For founders able to develop and demonstrate solutions that can pull carbon dioxide directly from the atmosphere or oceans, and sequester it durably and sustainably.

  • All Ventures

Captura

Captura provides a scalable, low-cost direct ocean capture (DOC) carbon removal solution that produces a measurable stream of CO2 for sequestration with only seawater and renewable energy. This process requires no external additives, produces no byproducts, requires no freshwater, has a minimal land footprint, and can operate with intermittent power. The technology has been fully demonstrated at a 100-tonne scale since November 2023, and Captura is deploying a 1,000-tonne system in Q1 2025.

capturacorp.com

CDL Mentor Endorsement
"Direct Open Capture is a nascent subsector in the durable carbon removal sector, which in itself is maturing. DOC has massive scale potential given that our planet consists mainly of water. I particularly appreciate Captura's planned sequential scaleup from demonstration to deployment phase. My sense is that the management team have taken a conservative, yet realistic path to growth. I also like the mix of proven experience combined with highly capable youth, which drives a positive dynamic." - Mark Griffiths, Co-Founder and CEO, COSOLVE

Gigablue

Gigablue’s marine carbon dioxide removal (mCDR) technology marks a significant breakthrough in combating climate change. By utilizing geo-targeted particles, Gigablue stimulates phytoplankton growth for effective carbon fixation, while its controlled gravity core ensures responsible deep ocean sequestration. This process ensures that the carbon is sequestered for thousands of years, contributing to global carbon reduction goals in a scalable and environmentally friendly manner.

gigablue.co

Skyrenu

Skyrenu is developing an integrated capture system for businesses engaged in carbon management, using a modular direct-air capture (DAC) device that produces high-concentration CO2 for on-site sequestration. Their proprietary process employs moving cells with distinct sorption and desorption reactors, ensuring efficient CO2 capture and release. This results in more efficient energy use and reduced sorbent material for a given capacity.

skyrenu.com

CDL Mentor Endorsement
"Skyrenu's Direct Air Capture plans are practical, scalable, and have the potential to continue to be optimized in multiple dimensions. They have executed on time on their 50 tCO2/yr system, and are implementing a multi-pronged approach to generating revenue by selling to individual sites and scaling up to sell to DAC hubs. The team has a solid technical background, a top-notch business development person, and has been practical about integrating business signals and feedback quickly then executing on it." - Margarita Marinova, Senior Engineer and Planetary Scientist

UNDO

With nature-enabled enhanced rock weathering technology, UNDO generates permanent, high-quality carbon removal credits with added co-benefits to support businesses on their pathway to net zero. UNDO aims to spread enough rock by 2030 to remove one million tonnes of CO2, a first step towards gigatonne-scale operations.

un-do.com

CDL Mentor Endorsement
"As someone who’s dedicated my career to advancing climate solutions across academia, government, and industry, I raised my hand for UNDO because they exemplify what the carbon removal field needs most: credible science, real-world traction, and a bold vision to scale gigaton impact. UNDO’s enhanced rock weathering approach harnesses the power of nature and geology to lock away carbon—permanently. But what truly sets them apart is their execution. Their team blends deep technical expertise with operational excellence, translating a scientifically sound process into a deployable solution that can be embedded in agricultural systems worldwide. It’s not just a climate win—it’s a co-benefit for farmers, soils, and ecosystems. To the CDL community: UNDO is the kind of team you want in your orbit. They are sharp, resilient, and deeply mission-aligned. Their win at the Carbon Removal XPRIZE is more than a trophy—it’s a validation of their potential to lead this industry forward. Backing ventures like UNDO isn’t just a smart bet—it’s how we build the future we urgently need." - Phil de Luna, Chief Carbon Scientist and Head of Engineering, Deep Sky

Vaulted Deep

Vaulted Deep is a biomass carbon removal and storage (BiCRS) solution that delivers carbon removal (CDR) at scale through the geologic sequestration of carbon-filled organic waste. Vaulted Deep geologically injects minimally processed wastes for permanent (10,000+ yrs) carbon removal. Its patented slurry sequestration technology reduces the significant adverse effects caused by legacy waste systems, improving local environmental and human health and advancing environmental justice.

vaulteddeep.com

CDL Mentor Endorsement
"In addition to being a great venture with dynamic leaders, I think the concept is great. Vaulted is going to sequester underground sludgy organic waste, saving it from being landfilled and releasing methane gas. The methane will remain there for thousand years and beyond. How do I know that? Well, their technology builds on O&G engineering practices that have been used safely for decades and this is why this technology is scalable immediately. In addition, their proposition is unique, as it combines CDR with local environment and health improvement." - Magali Anderson, Member of the Board of Directors, Anglo American

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