Legion 44 Featured Companies

44.01 transforms CO2 into rock through cutting-edge mineralization technology. By injecting CO2-infused water into reactive rock formations, 44.01 permanently locks away carbon as stable minerals. This scalable, cost-effective solution leverages existing infrastructure to combat climate change at a global scale. With rigorous monitoring and a mission to make an enduring impact, 44.01 offers opportunities to shape the future of sustainable technology.

Absolute Climate is an independent standard and methodology developer for carbon removal, focused exclusively on defining and assessing carbon credit quality. Their first product is a universal carbon removal standard that applies consistently across all CDR pathways, setting a new benchmark for credit integrity. The Absolute Carbon Standard has been adopted by existing registries to provide project developers with a complete and trustworthy crediting solution. By operating independently of registries, Absolute Climate recenters the project asessment process on climate impact rather than credit issuance. Absolute Climate’s approach is grounded in carbon cycle science and robust carbon accounting principles, ensuring that credits represent real, measurable changes to the planet’s carbon balance.

Africa Climate Ventures is a leading climate venture builder and investor in Africa, focused on pioneering carbon removal solutions. As the world gears up for the unprecedented scale up of a new carbon removal industry, Africa’s unique natural resources—rapidly growing biomass, renewable energy, available land, unique geology, and a young, skilled population—position it to lead in deploying emerging carbon removal technologies. At ACV, we're driving this industry forward by investing in innovative carbon removal projects, including DACCS, biochar, and enhanced rock weathering. We see immense potential in these and other removals pathways and are committed to advancing CDR across the continent.

Air Company exists to solve one problem: climate change. We do this by engineering scalable, modular technology that helps industries reduce greenhouse gas emissions. Our AIRMADE™ System is an advanced carbon conversion technology solution that transforms CO2 into an endless resource.

Brilliant Planet's process harnesses the power of algae to capture and store carbon. By growing algae in coastal deserts, the company accelerates its natural carbon-fixing properties through a controlled, multi-phase process that includes lab cultivation, greenhouse growth, outdoor ponds, and drying. The algae biomass is then buried in specially designed landfills to ensure stable, long-term carbon storage. This method mimics natural carbon cycles while providing a scalable, sustainable solution for mitigating climate change.

Our mission is to speed up negative emissions. We do this via policy work (co-founders of five policy/lobby organizations), impact investments in CDR startups and hands-on scientific work focussed on enhanced weathering in the world's largest greenhouse experiment for EW. We are funded by a foundation.

Carbon Removal Partners partners with the most ambitious entrepreneurs in the formative stage of their companies to support them and transform them into global winners.

The Carbon Removal Standards Initiative (CRSI) provides technical assistance to NGOs and policymakers to develop and implement CDR policies, with a unique focus on quantification standards.

Carbon180 is a new kind of climate nonprofit on a mission to reverse two centuries of carbon emissions. We design and champion equitable, science-based policies that bring carbon removal solutions to gigaton scale. Together, we can create a livable climate in which current and future generations can thrive.

Carbonfuture is a provider of high-quality, durable carbon removal credits, focusing on building trust across the carbon removal supply chain. Through a data-driven digital platform, they ensure rigorous monitoring, reporting, and verification (MRV) for carbon removal projects. They support suppliers with due diligence, certification, and access to carbon removal markets, ensuring transparency and compliance. Carbonfuture works with a variety of carbon removal technologies to meet global climate goals, helping businesses confidently invest in carbon removal for measurable, long-term climate impact.

Cella is a startup developing technology to store carbon dioxide underground by turning it into rock. Our goal is to provide a long-lasting, low-cost, and reliable way to keep CO₂ out of the atmosphere. We work with industries that capture CO₂, including those that have difficulty reducing their emissions, as well as companies that pull carbon directly from the air. Cella handles every step of the storage process—from evaluating geologic storage sites to injecting CO₂ and carefully monitoring its long-term safety. Our technology can open up new locations around the globe for carbon storage and offers cost savings compared to traditional methods. We are currently building our pilot plant in Kenya, where many partner companies are setting up operations to help grow a thriving carbon removal industry in the region. Scaling the science to meet humanity’s need for natural, permanent carbon removal, Cella is leading the way in creating a solution that benefits both the environment and the economy.

Climeworks is one of the global leaders in carbon removal and empowers its clients worldwide to advance their net-zero roadmaps and fight global warming. The company develops and operates Direct Air Capture (DAC) plants to remove CO2 from the atmosphere on a gigaton scale by 2050. It runs the world’s two largest operational Direct Air Capture plants in Iceland, powered exclusively by renewable energy. By partnering with storage specialists such as Carbfix, Climeworks ensures the permanent removal of captured CO2, safely stored underground for thousands of years. Its carbon removal via Direct Air Capture is verified and certified by independent third parties DNV and Puro.earth, ensuring utmost transparency and trust. In addition to innovating and scaling Direct Air Capture technology, Climeworks offers curated portfolios of high-quality carbon removal solutions, combining best-in-class engineered and nature-based approaches. Its diverse and expanding customer base includes multinational corporations such as Microsoft, Boston Consulting Group, J.P. Morgan Chase & Co., and SWISS, placing Climeworks at the forefront of driving corporate sustainability worldwide.

GCV is a systems integrator and project development company working to harness the abundant resources of the East African Great Rift Valley towards global decarbonization efforts by developing large-scale green industry and technical removal projects in suitable project sites. We work with energy-intensive businesses looking for renewable energy and waste heat, enabling them to operate with enhanced efficiency and achieve net zero targets. We have a particular focus on Direct Air Capture and Storage (DAC&S), taking advantage of the Rift Valley geology that allows for carbon mineralization. Our goal is to capture 1M+ tonnes of CO2 annually from the atmosphere by 2030s.

Heirloom’s technology enhances the power of limestone – the world’s 2nd most abundant mineral and one of the cheapest –  to capture CO2 directly from the air. We partner with transport and storage providers to permanently and safely store this CO2 so it doesn’t return to the atmosphere. Limestone is made up of calcium oxide (CaO) and CO2. When CO2 is removed from the limestone, the remaining calcium oxide is hydrated with water to form lime. Lime is “thirsty” for CO2 because it wants to return to its natural limestone state and acts like a sponge – pulling CO2 from the atmosphere. Heirloom’s technology accelerates this natural property of limestone, reducing the time it takes to absorb CO2 from years to less than 3 days. Heirloom heats the limestone mineral powder in a renewable-energy powered electric kiln to remove the CO2. The powder is laid on vertically-stacked trays where highly-trained algorithms inform our systems on how to “treat” the limestone to optimize its ability to absorb CO2. Heirloom loops limestone powder repeatedly through this process which makes CO2 removal efficient and less costly.

Kenya Electricity Generating Company (KenGen) is East Africa's largest power producer, with a diverse energy portfolio including geothermal, hydro, thermal, and wind power. It generates around 60% of Kenya's electricity and has expanded its operations across multiple African countries. KenGen focuses on delivering affordable, clean energy while ensuring sustainability and shareholder value. Its strategic priorities include enhancing its geothermal capacity and fostering innovation in the energy sector. The company also emphasizes environmental responsibility, community engagement, and cutting-edge energy solutions.

Octavia Carbon is the Global South’s first Direct Air Capture (DAC) company, based in Nairobi, Kenya. The company is developing geothermal-integrated DAC machines to facilitate the permanent removal of CO2 from the atmosphere. By leveraging Kenya’s abundant renewable energy resources, geology, and skilled workforce, Octavia aims to scale DAC down the costs of DAC technology. With its pilot DAC+Storage facility set to launch by December 2024, Octavia is on track to become the second DAC company globally to inject CO2 underground through its partner, Cella Mineral Storage, and to deliver DAC+Storage credits.

Olsuswa Energy is a Kenyan company focused on developing renewable geothermal energy projects across Africa. Their flagship project, the BVC Geothermal Project near Lake Turkana, aims to harness the region's geothermal potential. The company is committed to innovation, environmental responsibility, and fostering strong stakeholder relationships to lead in geothermal energy production. Olsuswa envisions becoming Africa’s largest geothermal producer, with an exploration plan targeting up to 600 MWe of geothermal capacity.

Planetary Technologies focuses on ocean-based carbon removal through Ocean Alkalinity Enhancement (OAE). Their process involves adding magnesium hydroxide to seawater to neutralize CO2, transforming it into stable salts that are stored in the ocean for over 100,000 years. By utilizing existing coastal outfall infrastructure, the company minimizes environmental disruption and reduces project costs. Planetary ensures safety through rigorous monitoring, measurement, and community collaboration, scaling projects only with local approval.

Seafields mitigates carbon through several different pathways. Seafields avoids the release of methane by preventing Sargassum seaweed from beaching, rotting and producing methane. It also displaces the use of fossil fuels as a feedstock for industry by providing the seaweed biomass, which can be turned into useful products such as bioplastics, biofuels, emulsifiers and even vegan leathers.

Shopify supports carbon removal through its Sustainability Fund and co-founded Frontier, investing millions in scalable carbon capture technologies. By backing companies like Climeworks and Charm, Shopify aims to make carbon removal accessible, affordable, and essential for businesses to achieve climate goals.

We remove carbon dioxide from the atmosphere by accelerating Earth’s natural carbon dioxide regulating mechanism - weathering. Silicate takes surplus concrete from the building industry, process it to a fine dust by milling it, and work with farmers to apply it to their fields as a soil pH amendment. Once the material is applied to agricultural land that has sufficient moisture and is of a suitable pH, it begins to break down, permanently removing carbon dioxide from the atmosphere.

Syncraft specializes in wood-powered energy plants, using patented technology to efficiently convert wood, particularly forest residues, into climate-positive energy. Their systems generate electricity, heat, natural gas substitutes, and hydrogen, while producing biochar that serves as a long-term carbon sink. Syncraft's goal is to create sustainable, zero-emission energy solutions.

XPRIZE Carbon Removal is a $100 million competition designed to accelerate solutions for large-scale carbon removal. The challenge invites innovators globally to develop technologies capable of removing CO2 from the atmosphere or oceans, with teams demonstrating scalability and sustainability. Winners must achieve at least 1,000 tons removed annually and model costs at a million-ton scale, aiming for gigatonne-scale solutions to combat climate change.