Alternatives to Heirloom

Industrial carbon capture technology company offering modular CycloneCC systems that retrofit onto existing industrial emitters.

Membrane technology for carbon capture, hydrogen, and natural gas.

Canadian climate solutions company developing direct air capture technology to remove CO2 from the atmosphere.

Direct air capture technology to remove CO2 from the atmosphere and store it permanently.

Carbon removal services using enhanced rock weathering to combat climate change.

Develops scalable, low-cost direct air capture technology using an electrochemical process.

Technology that removes CO2 from water, turning water infrastructure into carbon capture facilities.

Mombak is a carbon removal company focused on planting native trees.

Global climate solutions provider helping organizations achieve net-zero emissions.

Converts carbon emissions and waste into green liquid fuels and chemicals.

Climate-tech startup making Asia's rice farming more water-resilient by combining satellite imagery, AI, and field operations to reduce water usage and methane emissions.

Global commodity data and analytics platform for ESG and energy markets.

Global standard for high-integrity conservation and restoration projects on carbon markets.

Direct air capture startup producing CO2 and hydrogen for e-fuels and negative emissions.

Carbon removal solutions by enhancing river alkalinity to sequester carbon dioxide and restore river ecosystems.

Climate-tech startup developing technology to extract high-quality drinking water from atmospheric moisture using renewables.

Climate tech company developing Direct Air Capture and hydrogen co-production for affordable e-fuels.

Flowcarbon provides bespoke capital solutions and project finance expertise for innovative companies in frontier industries like infrastructure and decarbonization.

Frost Methane helps livestock farms reduce methane emissions from manure ponds and generate revenue from carbon credits.

Develops a novel, low-cost solvent-based carbon capture technology to decarbonize industrial emissions.

Bomvento is a cleantech startup focused on carbon removal through innovative technologies.

Direct air capture technology for atmospheric CO2 removal.

Climate tech venture capital firm investing in technologies that reshape cities for sustainability.

Developing compact fusion power technology for clean, scalable, and sustainable energy solutions.

Gigablue offers durable carbon removal through pioneering microalgae carbon fixation and sinking (MCFS) method, leveraging AI and biogeochemistry.

Pioneering sustainable carbon dioxide removal solutions with innovative partners.

A platform simplifying marine fuel procurement with a focus on transparency, sustainability, and financing.

German provider of integrated renewable energy solutions for homeowners, offering solar panels, battery storage, heat pumps, and EV charging.

World's leading laser fusion company.

Nuclear energy startup developing small, high-temperature reactors for AI data centers and industrial applications.

CarbonClick provides a platform for businesses to offset their carbon emissions.

Developing a novel process to produce low-carbon cement.

Develops, owns, and operates industrial-scale facilities producing green hydrogen derived e-Fuels.

Deeptech energy startup developing nanocellulose-based renewable energy storage.

Crusoe uses stranded energy to power high-performance computing for AI and blockchain.

Heron Power develops industrial power electronics for the 21st-century grid, addressing surging energy demand with scalable, reliable, and software-integrated infrastructure.

Electra is decarbonizing the iron and steel industry with clean-iron electrowinning technology.

Carbon capture technology converting CO2 into valuable chemicals and fuels.

Developing a novel, sustainable process for extracting valuable minerals from industrial wastewater.

Green materials platform using patented electroreduction to produce pure metals with zero carbon emissions.

Sustainability intelligence for cloud and AI infrastructure.

Develops advanced battery recycling technology for electric vehicle batteries.

Microplastic technology and innovation company capturing, harvesting, and recycling microplastics from wastewater and textiles.

Developing pollution-free metal processing technology.

LanzaTech transforms waste carbon emissions into valuable products like ethanol, SAF, and chemicals.

Non-profit empowering individuals and businesses to reduce and offset their carbon footprint.

Geospatial AI platform that accelerates renewable energy project development by automating site selection, permit processing, and grid connection analysis.

Ark Climate empowers municipalities to accelerate climate action.

Platform for home and vehicle electrification, offering personalized recommendations and supplier connections.

A company focused on direct air carbon capture projects.

Global leader in high-resolution satellite-based greenhouse gas emissions monitoring and intelligence for industrial facilities.

Colossus is a climate-technology company focused on accelerating the clean-energy movement through solar software and a marketplace.

Develops and manufactures rotor sails for wind-assisted propulsion on ships.

AI-driven water monitoring company

A global initiative focused on improving air quality and safeguarding public health in urban environments.

Carbon accounting and ESG reporting platform for businesses.

Understory provides hyper-local weather data and analytics for businesses impacted by weather events, particularly in agriculture and insurance.

Calgary-based startup developing technology to convert captured CO2 into valuable building materials.