Exterra Carbon Solutions

What Exterra Carbon Solutions does

Exterra Carbon Solutions (operating under related entity Exterra Technologies) is a Quebec-based negative emissions technology company founded in 2021 that develops mineral processing technologies for the mining industry. Its platform is anchored by three proprietary technologies: ARC (Acid Regeneration Cycle), a closed-loop system that regenerates acids and bases on-site at a cost the company claims beats delivered single-use reagents; LOW (Low-Carbon Oxide Production from Waste), which integrates ARC with conventional hydrometallurgy to improve recoveries, reduce waste, and shrink footprint; and ROC (Reactive Oxide to Carbonate), which transforms CO2 into stable carbonate minerals co-located with emission sources for durable carbon storage. The company positions ARC as the first significant mineral processing breakthrough in two decades and targets mining operators needing to reduce reagent OPEX, recover more metal from ore, and decarbonize tailings.

The company operates two facilities in Southern Quebec: the Exterra Technology Center (Hub Zero), a flowsheet development and testing site, and Hub I, a tailings reprocessing project aimed at processing asbestos mine tailings and storing over 500,000 tons of CO2 annually at full capacity. It employs a B2B enterprise field sales motion, developing custom processing flowsheets adapted to each commodity and ore type, with revenue derived from technology licensing/royalties and managed processing services. Funding to date totals approximately CAD $22.5 million, anchored by a CAD $20 million Series A in May 2025 led by Clean Energy Ventures and BDC Capital, with participation from the Government of Quebec, Investissement Quebec, Kinetics, and MOL Switch. The company has stated international expansion as a use of proceeds.

Name

Exterra Carbon Solutions

Legal name

Exterra Technologies

Website

https://exterracarbon.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

11–50 employees

Short description

Exterra Carbon Solutions is a Quebec-based negative emissions technology company that licenses proprietary mineral processing platforms (ARC, LOW, ROC) to mining companies to reduce reagent costs, improve metal recovery, and durably store CO2 as stable carbonates.

Ownership category

akta.pro rank

Product category

Mining and Mineral Processing Technology

NAICS

Mining and Oil and Gas Field Machinery Manufacturing (33313)

SIC

Metal Mining (1000), Mining Machinery & Equip (No Oil & Gas Field Mach & Equip) (3532)

akta.pro primary industry

Mineral Processing Plant Design & EPCM (Flowsheet Development, Piloting & Scale-up) (IMAKALAK)

akta.pro secondary industries

Mine Development & Processing EPC (Critical Minerals) (IMAKAFAM), CO₂ Utilization in Industrial Processes (urea/fertilizers, enhanced oil recovery where applicable, process integration) (EUABAIAI), Brownfield Expansions & Sustaining Capital Projects (Debottlenecking, Upgrades) (IMAKAOAJ)

Keywords

• Mineral processing technology
• Carbon sequestration solutions
• Critical minerals extraction
• Hydrometallurgy processing
• CO2 mineralization

Headquarters

HQ city

Montreal

HQ country

Canada

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Technology Licensing and Processing Solutions: Exterra licenses its mineral processing technologies to mining companies. The company develops custom processing flowsheets adapted to each commodity and ore type, likely generating revenue through licensing fees, technology deployment fees, and ongoing technical support contracts.
2. Processing Services and Technology Operations: Through projects like Hub I and the Exterra Technology Center, the company may operate processing facilities that provide mineral processing services to mining clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Exterra develops and licenses proprietary mineral processing technologies for mining companies. Its platform comprises ARC (Acid Regeneration Cycle) for closed-loop on-site regeneration of acids and bases, LOW (Low-Carbon Oxide Production from Waste) for integrated hydrometallurgy, and ROC (Reactive Oxide to Carbonate) for permanent CO2 storage via mineralization. The company builds custom processing flowsheets per commodity and ore type and operates the Exterra Technology Center and Hub I project in Southern Quebec to develop and deploy these technologies.

Product overview

Exterra Technologies (also operating as Exterra Carbon Solutions) is a Quebec-based mineral processing technology company offering a platform anchored in three proprietary technologies. The core platform is ARC™ (Acid Regeneration Cycle), which serves as a rechargeable battery for reagents, enabling on-site regeneration of acids and bases at costs below delivered single-use chemicals. Built around ARC, the company offers LOW™ (Low-Carbon Oxide Production from Waste), which integrates ARC with conventional hydrometallurgy for improved recoveries and reduced footprint, and ROC™ (Reactive Oxide to Carbonate), which transforms CO2 into stable carbonate minerals for decarbonization. The company operates two projects: the Exterra Technology Center for flowsheet development and Hub I for tailings reprocessing and carbon storage.

Differentiator

Problem solved

Functional benefit

Brands

• ARC (Acid Regeneration Cycle): Proprietary technology that recycles acids and bases used to extract metals from ore, in a closed loop, on site
• LOW (Low-Carbon Oxide Production from Waste)
• ROC (Reactive Oxide to Carbonate)

Products and services

• ARC (Acid Regeneration Cycle) Proprietary mineral processing technology that recycles acids and bases used to extract metals from ore in a closed loop on site, enabling mining operators to regenerate reagents at a cost that beats delivered, single-use chemicals. Targeted at mining companies seeking opex reduction and reduced neutralization loads.
• LOW (Low-Carbon Oxide Production from Waste) Technology that integrates ARC with conventional hydrometallurgy to improve metal recoveries, reduce cost, waste, and operational footprint in mineral processing. Designed for mining operators processing a range of ore types.
• ROC (Reactive Oxide to Carbonate) Carbon mineralization technology that transforms CO2 into stable carbonate minerals using low-carbon oxides produced with the LOW technology, enabling durable CO2 storage co-located with emission sources such as mining and industrial sites.
• Exterra Technology Center Flowsheet development and testing facility in Southern Quebec where Exterra develops and validates custom mineral processing flowsheets for each commodity and ore type, serving as the R&D and demonstration backbone for ARC, LOW, and ROC deployments.
• Hub I (Hub One) Tailings reprocessing project in Southern Quebec that processes asbestos mine tailings while establishing permanent carbon storage, targeting over 500,000 tons of CO2 stored annually at full capacity. Operationalizes the ARC, LOW, and ROC platform.

Quantifiable outcome

• Regenerate reagents on-site at lower cost than delivered single-use acids and bases
• +1 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Carbfix: Carbfix is an Iceland-based company that injects and mineralizes CO2 into basalt formations, producing stable carbonate minerals. It is the closest direct peer to Exterra's ROC technology, addressing durable CO2 storage via mineralization for industrial emitters.
• 44.01: 44.01 mineralizes CO2 into stable carbonate rocks, including from industrial waste streams, and works on tailings and peridotite-based carbonation. It overlaps directly with Exterra's ROC pathway of converting CO2 into stable carbonates for durable storage.
• CarbonCure Technologies: CarbonCure injects captured CO2 into concrete during mixing to mineralize it permanently. Like Exterra, it monetizes durable CO2 utilization in industrial processes for both carbon benefits and operational value, although applied to concrete rather than mining tailings.

Broad incumbents

• Mineral Technologies Inc. Mineral Technologies is an established global supplier of mineral processing and separation solutions for mining and industrial mineral customers. It competes with Exterra in the broader mineral processing flowsheet space, but as a diversified incumbent with a much broader product portfolio.
• FLSmidth: FLSmidth is a global engineering company providing equipment, service, and digital solutions across the mining and cement value chains. It directly overlaps with Exterra's mineral processing flowsheet scope and competes for engineering and technology integration mandates at mining operators.
• Metso: Metso is a leading supplier of mining and metals processing equipment, including comminution, separation, and hydrometallurgy solutions. It competes with Exterra's ARC and LOW offerings by providing incumbent flowsheet equipment and process integration services to the same mining customers.
• Hatch Ltd. Hatch is a major global engineering and project management firm with deep mining and metals processing practices. It competes with Exterra for mineral processing flowsheet design, EPCM mandates, and owner-engineer roles at the same mining operators Exterra targets.
• Wood PLC: Wood is a large global engineering and consulting firm with a substantial mining and metals practice offering process design, EPCM, and decarbonization advisory. It overlaps with Exterra's mining and decarbonization service offerings for enterprise mining customers.

Emerging players

• C-Quest Capital: C-Quest Capital develops carbon capture and storage projects, including mineral carbonation, for industrial emitters. It is an emerging peer in the CO2-to-minerals space, comparable to Exterra's ROC technology, though focused more on project finance and offtakes than proprietary flowsheet technology.
• CarbonOrO: CarbonOrO is an emerging carbon capture and utilization company developing mineralization-based pathways for permanent CO2 storage, including from industrial process streams. It is comparable to Exterra's ROC technology as an emerging player in mineral carbonation for industrial decarbonization.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/ESG_NR

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds4 records

Investors7 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 Exterra Carbon Solutions