Eion

What Eion does

Eion Corp is a U.S.-based climate technology company that removes atmospheric carbon dioxide through Enhanced Rock Weathering (ERW), applying pulverized olivine to farmland as a 1:1 replacement for agricultural lime. The company's core product, CarbonLock, accelerates natural silicate mineralization, with CO2 permanently sequestered via ocean transport of weathering byproducts. Eion's primary technical differentiator is a patented direct soil measurement MRV methodology using immobile trace elements and before/after alkalinity flux quantification, which the company pioneered as the first ERW player to deliver verified credits to Stripe.

The company sells verified, permanent carbon removal credits to enterprise buyers with net-zero and Scope 3 commitments, with a go-to-market combining direct enterprise sales (Microsoft, Stripe, Frontier AMC) and channel partnerships through agricultural cooperatives (Southern Ag, AGRIgate, Growmark, Perdue Agribusiness) that handle farmer relationships, soil sampling, and last-mile logistics. A dedicated insetting product line addresses Scope 3 emissions within corporate agricultural supply chains. Key operational infrastructure includes a guaranteed 500,000 tons/year olivine supply agreement with Sibelco (Norway) and operational offices in Oakland (corporate), Mississippi (field operations), and formerly Princeton, NJ.

Eion was founded in 2019 by Adam Wolf and Elliot Chang, raised approximately $15M in Series A funding (AgFunder and Ridgeline co-led in December 2022; $3M extension in September 2024 led by Growmark), and was acquired by Google-backed ERW competitor Terradot on February 6, 2026, forming the leading global enhanced rock weathering platform. The company had set an ambitious target of 10 million tons of annual CO2 removal capacity by 2030, with a 500,000-ton milestone targeted for 2026.

Name

Eion

Legal name

Eion Corp

Website

https://eioncarbon.com

Company type

Private

Founded year

2019

Operating status

Acquired

Headcount range

11–50 employees

Short description

Eion Corp deploys pulverized olivine on U.S. farmland for permanent carbon dioxide removal via enhanced rock weathering, selling verified removal credits to enterprise buyers like Microsoft, Stripe, and Frontier while partnering with agricultural cooperatives to access farmland at scale.

Ownership category

akta.pro rank

Product category

Carbon Removal / Enhanced Rock Weathering

akta.pro primary industry

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

akta.pro secondary industry

Enhanced Weathering & Mineralization Projects (Ex-situ/In-situ) (EUABABAK)

Keywords

• Enhanced rock weathering
• Permanent carbon removal
• Carbon dioxide removal
• Olivine soil amendment
• Carbon removal credits

Headquarters

HQ city

Princeton

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Carbon Removal Credits: Eion generates revenue by selling verified carbon removal credits to corporate buyers. Credits represent permanent CO2 removal achieved through enhanced rock weathering on farmland. The company has delivered credits to Stripe and has contracts with Microsoft (8,000 tons over 5 years) and Frontier buyers (78,707 tons between 2027-2030).
2. Insetting Projects: Eion is pursuing insetting projects that integrate ERW directly into existing value chains, enabling companies to remove atmospheric CO2 within their own operations and lower Scope 3 emissions.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

Eion removes atmospheric CO2 permanently and verifiably by applying pulverized olivine (CarbonLock) to farmland, accelerating natural enhanced rock weathering. The company sells verified carbon removal credits to enterprise buyers with net zero commitments and offers insetting projects for supply chain Scope 3 emissions reduction. CarbonLock serves as a 1:1 replacement for agricultural lime, balancing soil pH while sequestering approximately one ton of CO2 per ton of olivine applied.

Product overview

Eion offers enhanced rock weathering (ERW) as a scalable climate solution using its CarbonLock olivine mineral product, which serves as a 1:1 replacement for agricultural lime while permanently removing CO2 from the atmosphere. The company's core offering combines CarbonLock (the olivine soil amendment), ERW technology (the deployment methodology), carbon removal credits (the verified output), and insetting projects (supply chain integration) into an integrated platform that works with existing agricultural infrastructure to deliver permanent, high-quality carbon removal at scale.

Differentiator

Problem solved

Functional benefit

Brands

• CarbonLock: Eion's olivine mineral soil amendment product used for enhanced rock weathering carbon removal

Products and services

• CarbonLock Eion's proprietary pulverized olivine soil amendment that enables permanent CO2 removal through enhanced rock weathering. Removes approximately 1 ton of CO2 per ton of rock applied and serves as a 1:1 replacement for agricultural lime.
• Enhanced Rock Weathering (ERW) Carbon Removal Service End-to-end enhanced rock weathering service: spreads pulverized olivine on farmland to accelerate Earth's natural mineralization, permanently storing CO2 in the ocean. Includes sourcing, transport, deployment, and MRV.
• Carbon Removal Credits Verified, permanent carbon removal credits sold to enterprise buyers. Each credit represents one ton of CO2 removed and durably stored via Eion's patented direct soil measurement approach.
• Insetting Projects Supply chain carbon removal solutions enabling companies to integrate ERW directly into their own agricultural value chains, addressing Scope 3 emissions through insetting rather than offsetting.

Quantifiable outcome

• 1:1 carbon absorption rate (1 ton CO2 removed per ton of olivine applied)
• +5 more outcomes

Named customers5 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

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core, key and minor.

• TerradotcoreStrategic or Co-development Partner · 6 February 2026Terradot, a Google-backed ERW company, acquired Eion in February 2026. Transaction included Eion's contracts for 100,000+ carbon removal credits. Combined entity spans U.S. and Brazil operations with basalt and olivine approaches.
• MicrosoftcoreGTM or Marketing Partner · 24 September 2024Microsoft signed a contract to purchase 8,000 tons of CO2 removal from Eion over five years using enhanced rock weathering. Major enterprise customer with significant carbon removal commitments.
• SibelcocoreStrategic or Co-development PartnerSibelco is Eion's primary olivine supplier, operating the world's largest and lowest-emitting olivine quarry in Åheim, Norway using hydropower. Eion has guaranteed minimum access to 500,000 tons of olivine per year. Sibelco pulverizes olivine to Eion's specifications for optimal weathering rates.
• Southern AgcoreChannel Partner/ Reseller/ DistributorSouthern Ag (also known as AGRIgate) is a key agricultural partner managing relationships with farmers representing over 1 million acres. They handle last-mile logistics, farmer engagement, soil sampling protocols, and ensure carbon removal meets scientific rigor standards.
• StripecoreGTM or Marketing PartnerStripe was Eion's first buyer and 'lighthouse customer,' accepting the first ERW carbon removal delivery and providing $1 million carbon repurchase. Stripe's rigorous technical standards challenged Eion to achieve excellence.
• University of Illinois Urbana-Champaign (UIUC)keyStrategic or Co-development PartnerResearch collaboration with UIUC on enhanced rock weathering verification. UIUC's Energy Farm provided site for multi-year field trials. Co-authored peer-reviewed publication in Global Change Biology demonstrating Eion's measurement approach.
• Leverhulme Center for Climate Change MitigationkeyStrategic or Co-development PartnerAcademic partner collaborating on ERW verification research. Co-authored peer-reviewed publication on direct measurement approaches for quantifying carbon removal from enhanced weathering.
• Frontier (Advance Market Commitment)keyGTM or Marketing PartnerFrontier buyers (supported by Stripe, Shopify, Google, Meta) signed large purchase agreement for 78,707 tons of CO2 removal between 2027 and 2030. Represents significant future revenue commitment.
• GrowfarmkeyChannel Partner/ Reseller/ DistributorPartnership with Growfarm enables Eion access to extensive agricultural land across the U.S. for deploying rock weathering at scale.
• Perdue AgribusinessminorChannel Partner/ Reseller/ DistributorCollaboration with Perdue Agribusiness for a separate enhanced rock weathering project, expanding agricultural partnerships.
• Enhanced Weathering Alliance (EWA)keyStrategic or Co-development PartnerIndustry coalition convened by Carbon Business Council to promote enhanced weathering as a carbon removal method. Eion co-founded the alliance. Aims to advance policy, create credible markets, and educate stakeholders.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Charm Industrial: Biomass carbon removal and storage (BiCRS) startup converting agricultural waste into bio-oil for underground sequestration. Sells permanent carbon removal credits to the same enterprise CDR buyer pool (Stripe, Microsoft, Frontier) as Eion.
• Heirloom Carbon Technologies: Direct-air-capture (DAC) carbon removal startup selling verified permanent credits to enterprise buyers including Microsoft, Stripe, and Frontier. Competes for the same high-integrity CDR contracts as Eion, with a different (DAC) technology pathway but identical customer base and credit product.
• Lithos Carbon: Direct competitor in enhanced rock weathering for carbon removal on U.S. farmland. Targets similar enterprise buyers with permanent CDR credits using basalt spreading on agricultural soils — same core technology and customer segment as Eion.
• CarbonCapture Inc. Direct-air-capture carbon removal company building megaton-scale facilities, with partnerships including Deep Sky and major CDR buyers. Competes for permanent CDR offtake contracts from the same corporate buyer ecosystem that purchases Eion's credits.
• Terradot: Google- and Microsoft-backed enhanced rock weathering company that acquired Eion in February 2026 to form the leading global ERW platform. Operates in both the U.S. and Brazil using basalt and olivine approaches — directly comparable technology, customer base, and go-to-market motion.

Broad incumbents

• Puro.earth: Carbon removal marketplace and methodology developer for biochar, DAC, and other durable CDR pathways. A leading registry and buyer-facing platform competing for corporate CDR procurement budgets alongside Eion's direct sales motion.
• Climeworks: Largest and most established direct-air-capture company and a broad incumbent in the carbon removal market. While focused on DAC rather than ERW, Climeworks competes with Eion for enterprise buyer commitments and shapes voluntary CDR market pricing and quality expectations.
• Carbonfuture: Carbon removal marketplace and registry that tracks and retires CDR credits across multiple methodologies including ERW. Acts as both a distribution channel and an MRV standard-setter for the same enterprise buyers Eion targets.

Emerging players

• CarbonCure Technologies: Carbon utilization company that injects captured CO2 into concrete for permanent mineralization. Competes for a portion of the same Scope 3 / corporate CDR buyer demand with a complementary (carbon-to-value) approach to permanent removal.
• Patch: Carbon credit API and marketplace enabling businesses to purchase verified carbon removal at scale. Sells Eion credits (visible on Eion's homepage) alongside other CDR providers, making it both a distribution partner and a competitor for end-buyer relationships.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/eioncarbon

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds2 records

Investors12 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 Eion