Circularity Fuels is a Redwood City, California-based climate technology company that converts waste carbon streams, starting with raw biogas from dairies, landfills and food waste, into drop-in hydrocarbon fuels including sustainable aviation fuel. Its modular electrified reactor platform pairs the Ouro bi-reforming reactor with the Aion Fischer-Tropsch synthesis reactor, reforming waste gas into syngas at a unit cost roughly one hundredth that of conventional methane reformers. Incubated by DCVC since 2024 and backed by MCJ, the company first sells ultra-high-purity methane to diamond and graphene growers and holds non-dilutive funding from ARPA-E, the NSF and the California Energy Commission.
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Nov 5, 2026
Latest raise
Funding activity · 1 round
Nov 5, 2026
$7M
Seed
Led by Trucks Venture Capital
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