What we fund
Projects and pathways
The Foundation works within Frontier's ecosystem but concentrates support on the projects we believe offer the strongest long-term impact -- even when they are not the cheapest option today. Below are the four removal pathways and the real companies building them.
Note: commitment figures below reflect Frontier buyers collectively, not solely the Transnology Foundation. Our Foundation-directed donations flow to a subset of these projects, chosen with Frontier's science experts.
Direct air capture
$46.6M committed by Frontier buyers to DAC projects
Machines pull CO2 directly from ambient air using chemical sorbents and heat. The captured carbon is compressed and injected into basalt rock formations underground, where it mineralizes over decades. Energy-intensive today, but costs are declining rapidly and the approach is highly measurable.
Example suppliers in Frontier's portfolio
Heirloom
$26.6M committed for 26,900 tons by 2030. Accelerates the natural limestone absorption process from years to days.
CarbonCapture
$20M committed for 45,500 tons by 2028. Modular DAC units deployable at scale near renewable energy sources.
Enhanced weathering
World's first large-scale enhanced weathering offtake - $57.1M with Lithos
Spreading finely ground silicate rock (basalt or olivine) on agricultural fields accelerates a natural geological reaction: as rainwater and soil chemistry break down the minerals, CO2 is converted into bicarbonate and locked into soil or washed into the ocean as stable mineral carbon. Farmers benefit from improved soil nutrients.
Example suppliers in Frontier's portfolio
Lithos Carbon
$57.1M committed for 154,240 tons by 2028 - Frontier's first enhanced weathering offtake.
Eion
$33M deal to remove carbon via enhanced rock weathering across US and international farmland.
Biomass carbon removal and storage
$53M committed to Charm Industrial alone - 37% price decline by 2030
Plants naturally capture CO2 as they grow. These approaches stop the carbon returning to the atmosphere when that biomass decays: Charm Industrial converts crop waste and sawdust into bio-oil and injects it deep underground. Other approaches produce biochar - a stable charcoal that can remain in soil for centuries.
Example suppliers in Frontier's portfolio
Charm Industrial
$53M committed for 112,000 tons. 8 pyrolyzers running 24/7; prices declined 37% between 2024 and 2030.
Arbor
$41M committed - bioenergy-based removal converting biomass into CO2 for permanent storage.
Ocean & mineralization
$58.3M committed to Vaulted Deep - one of Frontier's largest single bets
The ocean is already Earth's largest carbon sink, absorbing about 30% of human CO2 emissions. Ocean alkalinity enhancement - adding minerals to seawater - increases its CO2 absorption capacity permanently. Subsurface injection of CO2 into reactive rock formations triggers mineralization, locking carbon as solid rock.
Example suppliers in Frontier's portfolio
Running Tide
Ocean biomass sinking - submerges carbon-rich kelp in the deep ocean for long-term storage.
Vaulted Deep
$58.3M from Frontier - injects organic carbon slurry deep underground where pressure and chemistry ensure permanent storage.
Frontier portfolio breakdown
Carbon removal pathways
Frontier has committed $317M across 4 pathways and 44 portfolio companies, vetted by 60+ external technical reviewers. Click a pathway to explore it.
Direct air capture
Engineered machines pull CO2 directly from ambient air using chemical sorbents. The captured gas is compressed and injected into basalt rock formations underground, where it mineralizes into solid rock within two years.
Frontier committed
$47M
Cost today
$400 - $1,300/t today
Storage duration
1,000+ years
Pathway
Direct air capture
How it works
Air passes over a solid sorbent that binds CO2. Heat releases the CO2 in concentrated form. The gas is then compressed and either stored underground or used to make durable products. Current costs are high but decline sharply with scale and clean electricity.
Example Frontier suppliers
Heirloom
$26.6M | 26,900 t by 2030. Accelerates limestone re-carbonation from years to days.
CarbonCapture
$20M | 45,500 t by 2028. Modular units deployable near renewable energy.
Commitment figures reflect Frontier buyers collectively. frontierclimate.com
How projects are vetted
We don't pick projects in isolation. Both funding channels run through Frontier, the advance market commitment founded by Stripe, Alphabet, Shopify, Meta, McKinsey, and tens of thousands of Stripe Climate businesses. Frontier sources suppliers with 60+ external technical reviewers, monitors delivery, and retires tons only after independent verification.
Frontier targets removal that is permanent (storing carbon for centuries or longer), measurable, additional, and on a path to costing under $100 per ton at scale. Because these suppliers are early-stage, tons typically take 2-5 years to be delivered and verified.
The Foundation's 50% donation share is allocated to a narrower set of Frontier-vetted projects within these pathways -- chosen with Frontier's science and commercial experts for where early capital can have the greatest long-term impact.
Fund these projects
100% of your donation funds removal across these pathways. Secure checkout powered by Stripe.
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