What Banyu Carbon does

Banyu Carbon, Inc. is a Seattle-based, privately held climate technology startup founded in 2022 that is commercializing a sunlight-driven photochemical process for marine carbon dioxide removal. The company's core technology uses light to drive a metal-free organic chemical reaction that liberates CO2 from seawater — leveraging the fact that the surface ocean naturally equilibrates with atmospheric CO2 on a timescale of months — while co-generating solar electricity from the unused portion of incident sunlight. The captured CO2 is intended for geologic storage or industrial use, and the underlying reversible-photoacid chemistry is being advanced through a co-development partnership with James Robinson Specialty Ingredients announced in September 2024.

Banyu sells verified, low-cost carbon removal credits to enterprises and governments with net-zero commitments, monetizing via forward and pre-purchase contracts (a $0.5M pre-purchase by Stripe, Shopify, and H&M Group was routed through the Frontier advance market commitment in September 2023). The company is co-founded by University of Washington oceanographers Alex Gagnon (CEO) and Julian Sachs, who remain on faculty leave, and operates from CoMotion Labs at Fluke Hall on the UW campus with an 11-person team of PhD scientists and a business associate. Capital structure combines equity (Grantham Foundation-led 2022 rounds totaling roughly $8.375M with strategic participation from Berge Bulk, Crowley, Plug and Play, Rusheen Capital Management, Regen.vc, Propeller VC, Carbon Removal Partners, United Airlines Ventures, and the Grantham Foundation) with non-dilutive federal support from a DOE voucher (January 2024) and an NSF SBIR Phase I grant (March 2024). Distribution is relationship-driven direct enterprise sales, with the Frontier AMC pool functioning as the primary demand aggregation channel.

Name

Banyu Carbon

Legal name

Banyu Carbon, Inc.

Website

https://banyucarbon.com

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

1–10 employees

Short description

Banyu Carbon is a Seattle-based climate technology startup commercializing a sunlight-driven photochemical process that extracts CO2 from seawater and co-generates solar electricity, selling verified carbon removal credits to enterprises and governments pursuing net-zero targets.

Ownership category

akta.pro rank

Product category

Marine Carbon Dioxide Removal

akta.pro primary industry

Carbon Removal Project Development, Financing & Offtake (Developers, Aggregators, Buyers Clubs) (EUABAFAL)

akta.pro secondary industry

Carbon Removal Credits Trading (DAC, BECCS, Biochar, Mineralization) (EUAGAIAL)

Keywords

• Marine carbon removal
• Carbon dioxide removal
• Photochemical carbon capture
• Voluntary carbon credits
• Carbon capture technology

Headquarters

HQ city

Seattle

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Carbon removal credit pre-purchases: Banyu sells forward / pre-purchased carbon removal credits to corporate and government buyers. Evidence: a $0.5M pre-purchase of Banyu's carbon removal was made by Stripe, Shopify, and H&M Group in September 2023 as part of Frontier's advance market commitment. Credits are positioned as low-cost and easily verified.
2. Non-dilutive grant funding (R&D commercialization): Public-sector grant funding supports R&D and commercialization — including a U.S. Department of Energy voucher under the program to Accelerate Market Adoption of Clean Energy Technology (Jan 2024) and a National Science Foundation Phase I SBIR grant (March 2024). These are funding inputs rather than commercial revenue, but de-risk commercialization.

Pricing tiers

Go-to-market motion4 records

Distribution channels2 records

Marketing channels5 records

Core offering

Banyu Carbon develops and commercializes a sunlight-driven photochemical process that releases CO2 from seawater, where it is naturally equilibrated with atmospheric CO2, allowing the company to deliver low-cost, easily verified carbon removal credits. The process uses metal-free, earth-abundant organic compounds and co-generates solar electricity from excess sunlight; the liberated CO2 can be stored geologically or used by industry. Banyu sells verified carbon removal credits to companies and governments with ambitious climate goals via pre-purchase and forward contracts, including through pooled advance market commitments such as Frontier.

Product overview

Banyu Carbon offers a single unified carbon-removal technology built around one core product — its photochemical CO2 removal process — rather than a multi-module platform. The product centers on metal-free organic photoacids that use sunlight to drive CO2 out of seawater (which is naturally equilibrated with atmospheric CO2), with the freed CO2 suitable for geologic storage or industrial use and excess sunlight co-generating solar electricity. Banyu supplements this core offering with Measurement, Reporting and Verification (MRV) capabilities (led by a dedicated Head of MRV and Data Science) and with verified carbon-removal credits sold via pre-purchase agreements (e.g., through Frontier Climate's advance market commitment to customers such as Stripe, Shopify, and H&M Group). R&D on the enabling reversible-photoacid chemistry is being advanced through a 2024 co-development partnership with James Robinson Specialty Ingredients (JRSI).

Differentiator

Problem solved

Functional benefit

Products and services

• Banyu Carbon Photochemical CO2 Removal Service (Verified Carbon Removal Credits)

Quantifiable outcome

• $0.5M pre-purchase of carbon removal from Stripe, Shopify, and H&M Group via Frontier's advance market commitment (September 2023)
• +1 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered flagship, minor and core.

• James Robinson Specialty Ingredients (JRSI)flagshipStrategic or Co-development Partner · 23 September 2024Banyu Carbon and James Robinson Specialty Ingredients (JRSI) announced a partnership on September 23, 2024 to co-develop reversible photoacids — a class of molecular switches central to Banyu's light-driven CO2 release chemistry. Relationship: Mutual (joint R&D / co-development).
• Carbon Business CouncilminorOthers · 6 February 2024Banyu Carbon joined the Carbon Business Council as a member in February 2024. The Carbon Business Council is an industry association for the carbon removal industry. Relationship: Mutual (industry membership / trade body).
• Ocean VisionscoreOthers · 31 January 2024Banyu was among eight Marine Carbon Dioxide Removal companies selected to join the second launchpad program cohort at Ocean Visions (January 31, 2024). Ocean Visions is a non-profit program supporting ocean-based carbon removal.
• ActivatecoreOthers · 8 June 2023Co-founders Julian Sachs and Alex Gagnon were selected as fellows for the 2023 Activate Anywhere Cohort (announced June 8, 2023). Activate is a fellowship program for climate-tech entrepreneurs providing non-dilutive support and community.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Climeworks: Climeworks is the most capitalized commercial DAC operator globally (>$700M+ raised, including the Mammoth plant) and the broad incumbent in the voluntary durable carbon removal market. Comparable to Banyu as a competing technology pathway for the same enterprise buyer pools, but with a fully commercial operating track record rather than an early-stage R&D profile.

Others

• Puro.earth: Puro.earth is a carbon removal registry and marketplace that issues certified carbon removal credits. Not a competitor but an ecosystem enabler for Banyu: Puro.earth's methodology registry and buyer network represent a potential distribution and certification channel analogous to Frontier for Banyu's verified carbon removal credits.

Emerging players

• Spiritus Carbon: Spiritus is an early-stage DAC startup developing sorbent-based direct air capture. Comparable to Banyu as a pre-commercial CDR technology startup competing for the same Frontier-style offtake, with a partial overlap in technology class (engineered carbon capture) but a different capture mechanism.

Direct peers

• CarbonCapture Inc. CarbonCapture Inc. is an emerging direct air capture company developing solid sorbent-based DAC systems targeting megaton scale. Direct peer to Banyu in the early-stage durable carbon removal startup category with similar enterprise-buyer monetization, but a different (air-based) capture mechanism.
• Heirloom Carbon Technologies: Heirloom is a leading DAC startup using limestone cycling to capture CO2 from air. Direct peer in the voluntary durable carbon removal market: same enterprise buyer segments (Stripe, Shopify, H&M Group via Frontier), same credit sale model, but a fundamentally different capture mechanism that makes Banyu's photochemical mCDR a competing technology pathway.
• Planetary Technologies: Planetary Technologies is a Canadian startup applying ocean alkalinity enhancement for carbon removal. Comparable to Banyu as a marine CDR startup competing in the same voluntary carbon credit market and same enterprise buyer ecosystem, with a different (mineral-addition) chemistry pathway.
• Charm Industrial: Charm Industrial converts biomass to bio-oil and sequesters it underground for durable carbon removal. Direct peer in the venture-backed durable CDR startup category — same Frontier/Stripe/Shopify-style buyer relationships, same voluntary credit monetization, but a fundamentally different capture/storage pathway.
• Equatic: Equatic builds marine CDR plants that use seawater electrolysis to remove CO2 while producing hydrogen as a co-product. Direct peer to Banyu: same marine CDR category, same voluntary carbon credit monetization, same co-product revenue thesis, with electrolysis-based rather than photochemical core chemistry.
• Captura: Captura is a Pasadena-based marine CDR startup that uses electrochemistry to extract dissolved CO2 from seawater — directly comparable to Banyu's seawater-based approach in product category, customer base (voluntary carbon credit buyers), and technology class (mCDR), differing primarily in the energy input mechanism (electrochemical vs photochemical).
• Ebb Carbon: Ebb Carbon deploys ocean alkalinity enhancement to remove CO2 from seawater and atmosphere. Closely comparable marine CDR peer: same working fluid (seawater), same voluntary carbon credit sale model, same enterprise buyer pool (Frontier), with chemistry-driven rather than electrochemistry/photochemistry approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds2 records

Investors6 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Banyu Carbon