Arca
Uses alkaline industrial waste and mine tailings to remove CO₂ from the atmosphere and transform it into rock.
Website: https://arcaclimate.com/
Cover Block
PUBLIC
| Attribute | Value |
|---|---|
| Name | Arca |
| Tagline | Uses alkaline industrial waste and mine tailings to remove CO₂ from the atmosphere and transform it into rock. |
| Headquarters | Vancouver, Canada |
| Founded | 2021 |
| Stage | Seed |
| Business Model | B2B |
| Industry | Cleantech / Climatetech |
| Technology | Other |
| Geography | North America |
| Growth Profile | Venture Scale |
| Founding Team | Co-Founders (3+) |
| Funding Label | Undisclosed (total disclosed ~$5,000,000) |
Links
PUBLIC
- Website: https://arcaclimate.com/
- LinkedIn: https://www.linkedin.com/company/arca.
Executive Summary
PUBLIC
Arca is a Vancouver-based startup that has secured a long-term offtake agreement with Microsoft while preparing a Series A round, presenting a timely opportunity to invest in an industrial carbon removal pathway that is already operational and validated. The company accelerates the natural process of carbon mineralization, using alkaline waste from mining and industrial sites to permanently sequester atmospheric CO₂ as rock, a method that has been ISO-validated and is currently deployed [XPRIZE Foundation, c. 2023-2024]. Founded in 2021, the company emerged from academic research at the University of British Columbia, where co-founder and chief scientist Dr. Greg Dipple spent decades studying the carbon storage potential of mine tailings [UBC Earth & Ocean Sciences, 2023].
The founding team combines deep scientific expertise with commercial experience. CEO Paul Needham previously co-founded and led Simpa Networks, a pay-as-you-go solar company in India that was acquired by ENGIE in 2018 [EventBrowse.com, retrieved 2026]. This operational background in distributed infrastructure in emerging markets is paired with Dipple's foundational research, which underpins the company's core technology. The business model is B2B, targeting large mining and metals companies as partners to provide carbon removal services, thereby creating a revenue stream from carbon credits and project development [arcaclimate.com, retrieved 2024].
Public funding records are limited to an undisclosed seed round in 2023, with total disclosed capital estimated at approximately $5 million [Axios Pro, Oct 2025]. The company's most significant commercial milestone to date is a decade-long offtake agreement with Microsoft to deliver nearly 300,000 tonnes of durable carbon removal, a deal that provides a foundational revenue anchor and validates the commercial demand for its approach [cantechletter.com, retrieved 2026]. Over the next 12-18 months, investors should monitor the close and terms of the planned Series A, the announcement of additional mining partners beyond the disclosed work with Talon Metals, and the scaling of delivery against the Microsoft contract.
Data Accuracy: YELLOW -- Core claims are confirmed by company and third-party sources, but specific financial metrics and some partnership details remain unverified.
Taxonomy Snapshot
| Axis | Classification |
|---|---|
| Stage | Seed |
| Business Model | B2B |
| Industry / Vertical | Cleantech / Climatetech |
| Technology Type | Other |
| Geography | North America |
| Growth Profile | Venture Scale |
| Founding Team | Co-Founders (3+) |
| Funding | Undisclosed (total disclosed ~$5,000,000) |
Company Overview
PUBLIC
Arca was founded in Vancouver, Canada, in 2021 as a commercial vehicle for a long-running academic research program. The company's genesis is tied directly to the work of its co-founder and chief scientist, Dr. Greg Dipple, a professor at the University of British Columbia who has studied carbon mineralization in mine waste for decades [UBC Earth & Ocean Sciences, 2023]. The founding team combined this deep technical expertise with commercial experience, bringing on Paul Needham, previously a co-founder of the pay-as-you-go solar company Simpa Networks, as CEO [Axios Pro, Oct 2025]. A third co-founder, Lydia Firth, joined in an operational leadership role, completing the core team that moved the technology from the lab toward industrial application [Perplexity Sonar Pro Brief, retrieved 2024].
The company's early milestones focused on validating and de-risking its core process. By 2023, Arca's approach to accelerating carbon mineralization in alkaline waste had achieved ISO validation, a key technical credential for the carbon removal credit market [XPRIZE Foundation, c. 2023-2024]. The same year, the company closed an initial seed financing round, though the specific amount and lead investor were not publicly disclosed [Crunchbase, retrieved 2024]. A significant operational milestone followed, with Arca stating its ISO-validated process had been deployed and was actively removing carbon dioxide, indicating a transition from pilot to at least one live project [XPRIZE Foundation, c. 2023-2024].
Recent developments point to a scaling phase. In 2026, Arca announced a major offtake agreement with Microsoft to deliver nearly 300,000 tonnes of durable carbon removal over the next decade [cantechletter.com, retrieved 2026]. The company also publicized a partnership with Talon Metals, which is developing a nickel resource in a joint venture with Rio Tinto, to integrate its technology into the battery mineral supply chain [cpecn.com, retrieved 2026]. As of late 2025, the company was preparing to open a Series A funding round to fuel further expansion [Axios Pro, Oct 2025].
Data Accuracy: YELLOW -- Founding details and recent milestones are confirmed by multiple sources, but specific details of the seed round (amount, lead) remain uncorroborated in public filings or major news announcements.
Product and Technology
MIXED
The core proposition is to use the waste of one industry to solve the emissions problem of another. Arca's technology accelerates a natural geochemical process, carbon mineralization, within the alkaline waste streams produced by mining and certain industrial operations [arcaclimate.com, retrieved 2024]. The company's public materials describe a system that integrates with existing mine sites, treating tailings,the pulverized rock left over after mineral extraction,as a reactive substrate for permanently sequestering atmospheric CO₂ [XPRIZE Foundation, c. 2023-2024]. This approach is framed as offering gigatonne-scale potential with a relatively light physical footprint, as it leverages pre-disturbed land and existing industrial infrastructure rather than requiring new, dedicated facilities [arcaclimate.com, retrieved 2024].
Public validation of the underlying process is a key asset. The company states its methodology has been ISO-validated and is already deployed, removing carbon dioxide [XPRIZE Foundation, c. 2023-2024]. The output is solid carbonate rock, a form of permanent geological storage that does not require long-term monitoring for leakage [XPRIZE Foundation, c. 2023-2024]. While the specific engineering enhancements that constitute the "acceleration" are not detailed in public sources, the involvement of Chief Scientist Dr. Greg Dipple, a leading academic researcher in the field, points to a foundation in peer-reviewed science [UBC Earth & Ocean Sciences, 2023].
Commercial traction is evidenced through announced partnerships and offtake agreements, though operational details remain sparse. Arca is working with Talon Metals, which is developing a nickel resource in a joint venture with Rio Tinto, suggesting a pathway to integrate carbon removal into the battery metals supply chain [cpecn.com, retrieved 2026]. More concretely, the company has secured a decade-long agreement with Microsoft to deliver nearly 300,000 tonnes of carbon removal [cantechletter.com, retrieved 2026]. This deal provides a tangible demand anchor and validates the credit-generating potential of the model, even as the specific mine sites and volumes currently under management are not publicly disclosed.
Data Accuracy: GREEN -- Core product claims are confirmed by company website and third-party foundation profiles; partnership and offtake details are reported by industry press.
Market Research
PUBLIC
The market for durable carbon removal is moving from a niche of corporate pledges to a measurable, performance-driven sector, a shift that directly benefits companies with validated, deployable technology.
Third-party sizing of the specific market for mineralization-based carbon removal is not yet widely published. However, the broader carbon dioxide removal (CDR) market provides a relevant analog. According to a 2023 report from McKinsey & Company, the annual demand for durable CDR could reach 0.4 to 1.7 gigatonnes of CO₂ by 2030, representing a market value of $6 billion to $40 billion annually [McKinsey & Company, 2023]. The firm projects that by 2050, demand could scale to 4 to 9 gigatonnes per year. While these figures encompass all durable CDR pathways, they illustrate the significant addressable market for solutions that can deliver permanent, verifiable storage.
Demand is being pulled by several concurrent forces. First, corporate net-zero commitments are maturing beyond simple emission reductions to include the removal of residual or historical carbon. Microsoft’s multi-year, multi-hundred-thousand-tonne offtake agreement with Arca exemplifies this trend toward large, long-term procurement [cantechletter.com, retrieved 2026]. Second, regulatory frameworks are beginning to formalize carbon removal accounting and credit integrity. The development of ISO standards for carbon removal, referenced in Arca’s own validation, provides a critical foundation for market trust and scalability [XPRIZE Foundation, c. 2023-2024]. Third, industrial sectors with hard-to-abate emissions, particularly mining and metals, are under increasing pressure to decarbonize their operations and supply chains, creating a natural partnership base for integrated solutions.
Key adjacent markets include the voluntary carbon market for avoidance-based credits and the compliance markets for carbon pricing. While these represent significant pools of capital, the trend is toward differentiation, with buyers seeking ‘removal’ credits that offer geological permanence over ‘avoidance’ credits. Substitutes for mineralization include other durable CDR approaches like direct air capture with geological storage (DACCS) and bioenergy with carbon capture and storage (BECCS). These technologies often require significant new infrastructure and land use, which is the primary point of contrast for solutions leveraging existing industrial sites.
Projected Annual CDR Demand (McKinsey, 2030) | 0.4 | Gt CO₂
Projected Annual CDR Demand (McKinsey, 2030) | 1.7 | Gt CO₂
Projected Annual CDR Demand (McKinsey, 2050) | 4 | Gt CO₂
Projected Annual CDR Demand (McKinsey, 2050) | 9 | Gt CO₂
The wide range in these projections underscores the market's nascency; its ultimate scale hinges on the pace of policy support, cost reductions, and the ability of suppliers like Arca to deliver at volume. The lower-end 2030 figure still represents a multi-billion-dollar annual opportunity, providing a credible near-term target for commercial traction.
Data Accuracy: YELLOW -- Market sizing is drawn from a single, credible third-party report (McKinsey) and is used as an analogous proxy. Specific sizing for the mineralization sub-segment is not publicly available.
Competitive Landscape
MIXED Arca enters a specialized corner of the carbon removal market where competition is defined less by direct product overlap and more by the specific geological and industrial constraints of a project site. The company's positioning hinges on its exclusive focus on repurposing existing alkaline mine waste, a strategy that carves out a distinct niche but also faces competition from broader mineralization approaches and alternative storage methods.
| Company | Positioning | Stage / Funding | Notable Differentiator | Source |
|---|---|---|---|---|
| Arca | Uses alkaline industrial waste and mine tailings for in-situ carbon mineralization at active/historical mine sites. | Seed stage; total disclosed funding ~$5M [PUBLIC]. | Integrates directly with mining operations, leveraging waste streams with no greenfield land footprint. | [arcaclimate.com, retrieved 2024] |
| Heirloom | Uses calcium oxide from limestone to capture CO₂ from air, then mineralizes it in partnership with concrete or storage sites. | Later stage; raised at least $53M in a 2021 Series A. | Focus on direct air capture (DAC) with a separate mineralization step, targeting high-purity CO₂ streams. | [Crunchbase, 2021] |
| 44.01 | Injects CO₂ into peridotite formations for permanent subsurface mineralization. | Venture stage; raised a $37M Series A in 2023. | Targets specific subsurface geology (peridotite) for mineralization, independent of industrial waste streams. | [Crunchbase, 2023] |
The competitive map in carbon mineralization splits along two primary axes: the source of the alkalinity and the location of the reaction. Arca competes in the 'industrial waste' segment, where its main rivals are not the named mineralization peers but the internal waste-management departments of its potential mining partners. The decision for a mining company is whether to invest capital to accelerate carbonation of its own tailings, often for credit generation, or to continue with conventional, passive management. In the adjacent 'enhanced weathering' segment, companies like Mati Carbon use purpose-crushed rock applied to land, competing for a similar pool of corporate carbon removal budgets but with a completely different operational model and set of land-use partners. The 'subsurface injection' model, exemplified by 44.01, represents a more capital-intensive, project-finance heavy approach that does not compete for the same waste streams but does compete for offtake agreements from large buyers like Microsoft [cantechletter.com, retrieved 2026].
Arca's defensible edge today is its founder-level scientific validation and its strategic foothold within the mining industry. Dr. Greg Dipple's two decades of research at UBC on carbon mineralization in mine tailings provides a deep technical moat and credibility with mining geologists [UBC Earth & Ocean Sciences, 2023]. This edge is durable if the company continues to publish and validate its acceleration methods, but it is perishable if that research becomes widely adopted or if a competitor licenses similar IP. The other edge is distribution: by framing miners as partners rather than mere hosts or waste suppliers, Arca aims to embed itself early in mine planning and lifecycle extensions. This channel advantage, however, is not exclusive and could be eroded if a major mining company develops its own in-house capability or partners with a larger engineering firm.
The company is most exposed on two fronts. First, its model is inherently tied to the geography and chemistry of specific mines. A competitor with a more flexible feedstock, like Heirloom's limestone-sourced process, could pursue a wider array of project sites unconstrained by the location of suitable tailings. Second, Arca does not own the underlying asset,the mine waste,giving its mining partners significant negotiating power over revenue sharing and potentially limiting margins. The partnership with Talon Metals, which is in a joint venture with Rio Tinto, demonstrates access but also underscores this dependency [cpecn.com, retrieved 2026].
The most plausible 18-month scenario is one of market segmentation and partnership consolidation. The winner will be the company that secures an exclusive, multi-site framework agreement with a global mining major, translating pilot projects into a replicable, financed deployment model. Arca is positioned for this if its work with Talon Metals scales. The loser in this timeframe would be a company that remains in the pilot phase without a clear path to commercial tonnage at a competitive price. For Arca, the risk is that the capital intensity of retrofitting active mines or the permitting complexity of historical sites slows deployment, allowing a well-funded subsurface injection player like 44.01 to secure a disproportionate share of early, large-scale offtake deals.
Data Accuracy: YELLOW -- Competitor funding and positioning are drawn from public databases and company materials, but detailed commercial terms and head-to-head project wins are not publicly available.
Opportunity
PUBLIC The prize for Arca is a foundational role in the permanent carbon removal market, a sector forecast to require multi-gigatonne annual capacity by mid-century to meet global climate targets [XPRIZE Foundation, c. 2023-2024].
The headline opportunity for Arca is to become the default infrastructure partner for the global mining industry’s decarbonization, transforming a multi-billion-tonne liability,alkaline mine waste,into a permanent carbon sink and a new revenue stream. This outcome is reachable because the company’s core technical process is not a speculative invention; it is an acceleration of a natural geochemical reaction, already ISO-validated and deployed in the field [XPRIZE Foundation, c. 2023-2024]. The strategic alignment is inherent: mining companies face intense pressure to reduce their carbon footprint and manage legacy waste, while Arca offers a pathway to address both simultaneously using existing sites and materials [arcaclimate.com, retrieved 2024]. The recent offtake agreement with Microsoft for nearly 300,000 tonnes of removal over a decade demonstrates that major corporate buyers see durable, geologically-stored carbon as a credible and valuable asset [cantechletter.com, retrieved 2026].
Arca’s path to scale hinges on which of several plausible growth scenarios materializes first. Each scenario turns on a specific catalyst already visible in the company’s early activity.
| Scenario | What happens | Catalyst | Why it's plausible |
|---|---|---|---|
| The Nickel Standard | Arca’s process becomes a mandated part of developing new critical mineral mines, particularly for nickel used in EV batteries. | A successful, publicized partnership with a major producer like Talon Metals (which is in a joint venture with Rio Tinto) establishes a replicable blueprint [cpecn.com, retrieved 2026]. | Battery supply chains are under scrutiny for both sourcing and emissions; offering carbon-negative nickel could command a premium and ease permitting. |
| The Legacy Cleanup Model | The company pivots to focus on monetizing historical mine tailings, creating a large-scale carbon removal service without needing active mining partners. | Securing a dedicated funding stream (e.g., via government remediation grants or dedicated carbon credit methodologies) for legacy site projects. | The volume of historical waste is vast and represents a pure removal opportunity; the partnership with Talon Metals also involves historical tailings [cpecn.com, retrieved 2026]. |
| The Tech-Stack Integration | Arca’s mineralization process is licensed as a core component of other carbon removal companies’ storage solutions, becoming a B2B technology provider. | A strategic investment or partnership from a major carbon removal platform seeking guaranteed, permanent storage capacity. | The company’s ISO-validated, deployed process is a tangible asset; the capital-light, partnership-based model is amenable to licensing [arcaclimate.com, retrieved 2024]. |
What compounding looks like for Arca is a data and operational knowledge flywheel. Each new mine site partnership generates proprietary data on mineralization rates, feedstock characteristics, and optimal engineering designs for different geologies and waste types. This dataset, which grows with each deployment, improves the accuracy of removal forecasts, reduces implementation risk for subsequent projects, and can inform the creation of new, site-specific carbon credit methodologies. Early evidence of this flywheel starting is the company’s ability to secure a decade-long offtake with Microsoft, a deal that likely required robust data to validate delivery schedules and permanence [cantechletter.com, retrieved 2026]. As the dataset expands, Arca’s proposals become more bankable, accelerating partnership discussions and reducing due diligence timelines.
The size of the win can be framed by a credible comparable. Heirloom, a direct air capture company also focused on permanent mineral storage, has raised over $100 million and signed significant pre-purchase agreements [Crunchbase]. While technologies differ, both companies sell durable carbon removal credits. If Arca’s "Nickel Standard" scenario plays out, embedding its process into the development of multiple major mines, it could capture a significant portion of the mining sector’s removal demand. A conservative scenario might see the company achieving a valuation comparable to other venture-backed carbon removal specialists that have secured large offtakes and demonstrate a clear path to gigatonne-scale,a potential outcome in the high hundreds of millions to low billions of dollars (scenario, not a forecast). The Microsoft agreement provides a tangible, multi-year revenue anchor against which to build that scale.
Data Accuracy: YELLOW -- The core opportunity thesis is supported by public company claims, a cited offtake agreement, and partnership announcements. Specific valuation comparables and detailed scaling economics are not publicly disclosed by the company.
Sources
PUBLIC
[arcaclimate.com, retrieved 2024] Industrial-scale carbon removal - Arca Climate | https://arcaclimate.com/what-we-do/
[XPRIZE Foundation, c. 2023-2024] Arca (Carbon Removal Team profile) | https://www.xprize.org/people/arca
[UBC Earth & Ocean Sciences, 2023] UBC CO₂ Mineralization Group | https://www.eoas.ubc.ca/research/co2-mineralization
[Axios Pro, Oct 2025] Mining carbon removal startup Arca readies Series A raise | https://www.axios.com/pro/climate-deals/2025/10/29/arca-series-a-microsoft
[EventBrowse.com, retrieved 2026] ENGIE acquires Simpa Networks | https://eventbrowse.com/event/engie-acquires-simpa-networks-2018-11-01
[cantechletter.com, retrieved 2026] Microsoft inks major carbon removal deal with Canada's Arca | https://www.cantechletter.com/2026/02/microsoft-inks-major-carbon-removal-deal-with-canadas-arca/
[cpecn.com, retrieved 2026] Talon Metals partners with Arca for carbon-negative nickel | https://cpecn.com/talon-metals-partners-with-arca-for-carbon-negative-nickel/
[Crunchbase, retrieved 2024] Arca Climate Technologies, Inc. - Crunchbase Company Profile & Funding | https://www.crunchbase.com/organization/carbin-minerals
[Perplexity Sonar Pro Brief, retrieved 2024] Arca (arcaclimate.com) company briefing | https://www.perplexity.ai/
[McKinsey & Company, 2023] The carbon dioxide removal market | https://www.mckinsey.com/capabilities/sustainability/our-insights/the-carbon-dioxide-removal-market
[Crunchbase, 2021] Heirloom raises $53M Series A | https://www.crunchbase.com/funding_round/heirloom-series-a--b3f8c5c0
[Crunchbase, 2023] 44.01 raises $37M Series A | https://www.crunchbase.com/funding_round/4401-series-a--f0c7e1b2
Articles about Arca
- Arca's Mine Tailings Turn Microsoft's Carbon Removal Into Rock — The Vancouver startup has an offtake for 300,000 tonnes and a bet that partnering with miners beats building from scratch.