What's the best direct-air-capture provider to buy durable carbon removal from?

If your priority is durable, high-integrity carbon removal specifically from direct air capture (DAC), my top pick today is Climeworks.

My ranking

1. Climeworks — best overall

• Strongest track record of actually operating DAC plants: Orca and Mammoth in Iceland.
• Pairs DAC with permanent geological storage; its Icelandic partner Carbfix mineralizes the CO₂ in basalt, with storage claimed for 10,000+ years.
• Orca has received an AAA BeZero rating, and Climeworks says it delivered 100% of its carbon-removal portfolio commitments in 2025.
• The catch: it's expensive. Climeworks currently advertises a 100% technology-based portfolio at $500/ton, although that product isn't necessarily 100% Climeworks DAC.
• Best for: someone who values demonstrated delivery and permanence over lowest price.

2. Heirloom Carbon Technologies — best emerging challenger

• Uses limestone-based DAC and plans permanent underground storage.
• Its credits are designed to represent exactly one ton of atmospheric CO₂ permanently removed, with third-party monitoring.
• Potentially attractive economics, but considerably less operating history than Climeworks.
• Best for: buyers willing to take more technology/project risk in exchange for supporting a potentially lower-cost DAC pathway.

3. 1PointFive — best for very large corporate purchases

• Its STRATOS plant in Texas is designed for up to 500,000 tonnes/year, with geological sequestration.
• It already has buyers including Microsoft, Amazon and Bain; Bain announced a 9,000-ton purchase in January 2026.
• But STRATOS is still ramping toward commercial operation, so you're taking more delivery/scale-up risk than with Climeworks' existing facilities.
• Best for: large organizations wanting U.S.-based, potentially much cheaper DAC at enormous scale.

What I'd actually buy

If I were spending my own money today, I'd choose Climeworks DAC + geological storage, even at a premium. The key distinction is that you're buying a removal with a relatively strong chain of evidence from capture → measurement → transport → permanent storage, rather than simply betting on a future plant.

For a corporate buyer making a $100k–$10M+ purchase, though, I wouldn't automatically put 100% with Climeworks. I'd consider a portfolio such as 50–60% Climeworks, 20–30% 1PointFive, and 20% Heirloom to diversify technology and delivery risk.

One important caveat: DAC is extraordinarily expensive and energy-intensive, so "best" doesn't mean "best climate impact per dollar." If your goal is maximum tonnes of durable removal per dollar, I'd compare DAC against enhanced rock weathering, biochar, and bioenergy with carbon capture and storage rather than assuming DAC wins.

If you tell me roughly how much you want to spend ($1k, $10k, $100k, $1M+), I can give you the best purchasing route and what I'd buy at that budget.

When looking for the "best" direct-air-capture (DAC) provider to buy durable carbon removal from, there isn’t a single definitive winner. Instead, the market features a few frontrunners distinguished by their operational maturity, permanent geological or mineral storage, and validation by strict third-party registries (such as Isometric or Puro.earth).

The top-tier providers in the space each bring a distinct approach to durable atmospheric removal:

1. Climeworks

• The Approach: Solid-sorbent direct air capture powered by renewable energy, paired with permanent underground mineralization storage (via partners like Carbfix in Iceland).
• Why they’re a leader: Climeworks is one of the most mature and operationally proven DAC companies globally. They have commercial facilities running and long-standing trust from major corporate buyers.
• Best for: Buyers looking for an established track record, robust transparency, and certified permanent storage.

2. 1PointFive (Occidental / Stratos)

• The Approach: Large-scale liquid-solvent DAC technology (originally from Carbon Engineering) designed to capture massive volumes of CO₂ for deep underground saline geological sequestration.
• Why they’re a leader: Backed by major energy infrastructure, their flagship Stratos plant in Texas represents some of the highest-capacity DAC deployment underway.
• Best for: Enterprise buyers seeking multi-thousand-ton scalability and gigaton-pathway potential.

3. Heirloom Carbon Technologies

• The Approach: Low-cost, limestone-based DAC that accelerates the natural carbon-mineralization process of rocks, permanently storing the captured CO₂ in concrete or underground.
• Why they’re a leader: Heirloom focuses on cutting down the high energy and capital costs typical of thermal DAC by using abundant, cheap materials like limestone, and they have strong backing from tech-forward procurement funds like Frontier.
• Best for: Buyers wanting to support novel, highly scalable chemistry with a clear path down the cost curve.

4. Emerging Innovators (Phlair, Capture6, Deep Sky)

• The Approach: Newer modular, electrochemical (Phlair) or water-positive (Capture6) DAC models that integrate waste-heat or local industrial ecosystems to drastically lower energy penalties.
• Why consider them: Often feature rigorous third-party scientific verification (e.g., Isometric certification) and cater to forward-looking corporate portfolios via platforms like Shopify Sustainability Fund or Stripe Climate.

What to Look For Before Buying:

• Durability: Ensure the CO₂ is permanently stored (1,000+ years) via deep geological sequestration or mineralization rather than utilized in short-lived products like synthetic fuels.
• Verification: Check that their protocols are audited by strict carbon standard setters (Isometric, Puro.earth, Verra).

Are you purchasing credits for a corporate net-zero commitment (and if so, what is your approximate volume/budget ), or are you looking for an individual offset?

Choosing the "best" direct-air-capture (DAC) provider for durable carbon removal depends on whether you prioritize proven delivery track records, novel low-cost scaling potential (like solid sorbents or limestone looping) , or rigorous third-party certification (such as Isometric or Puro.earth).

The top-tier DAC providers actively supplying or scaling durable, permanent carbon removal include:

• Climeworks: Widely recognized as a commercial frontrunner, Climeworks uses solid sorbent technology coupled with underground mineralization storage (via partners like Carbfix in Iceland). They have a strong operational track record and high delivery reliability metrics, making them a safe choice for corporate buyers seeking verified permanent storage.
• 1PointFive (STRATOS): Backed heavily and deploying massive infrastructure (such as their STRATOS plant), 1PointFive utilizes large-scale liquid solvent DAC technology. They target deep, gigaton-scale subsurface saline aquifer sequestration, appealing to enterprise buyers looking for massive volume capacity.
• Heirloom Carbon Technologies: Heirloom uses an innovative, lower-cost solid-material approach involving limestone to passively and actively absorb CO₂, which is then permanently stored or mineralized (including pioneering storage in concrete). They have backing from major sustainability buyers and offer a rapidly scaling North American footprint.
• Phlair: An emerging name in the electrolytic DAC space gaining traction for its energy-efficient and modular approach to permanent mineral storage, frequently cited by advanced market buyers.

If you are looking to source credits or structure an offtake agreement, matching your budget—prices generally range from roughly $200 to $800+ per ton depending on the volume and technological maturity—to a vetted portfolio aggregator like Frontier Climate can also de-risk your procurement strategy.

To help narrow down the ideal provider for your organization, let me know:

• What is your target volume (in tons)?
• What is your budget range per ton?
• Do you prefer a provider with fully operational commercial plants today or one scaling next-generation tech?

If your priority is durable, high-integrity carbon removal rather than simply the cheapest ton, my pick today is Climeworks.

My ranking

1. Climeworks — best overall for durability + proven delivery

• Its DAC projects pair atmospheric capture with permanent geological storage in Iceland, where CO₂ is mineralized in basalt and claimed to remain stored for 10,000+ years.
• It has already operated commercial DAC facilities, rather than selling credits solely against future capacity. Its Orca project has received an AAA rating from BeZero, and Climeworks says it achieved 100% delivery across its carbon-removal portfolios in 2025.
• It offers a straightforward way for buyers to procure durable removals, including a “technology focus / durable only” portfolio.
• Downside: expensive. Its durable-only portfolio is currently listed at about $500/t, although that portfolio isn't necessarily identical to purchasing a ton directly from a single DAC facility.

2. 1PointFive — best if you want massive eventual scale

• Its STRATOS DAC plant in Texas is designed for 500,000 tonnes/year, substantially larger than today's operating DAC facilities.
• CO₂ is intended for geological sequestration, with EPA-approved MRV and geological-timescale durability.
• Downside: you're taking considerably more project-development/execution risk because you're buying into a large-scale commercial buildout rather than the same level of operating history as Climeworks.

3. Heirloom — compelling technology, but I'd put it behind the two above for a conservative purchase

• Its limestone-based approach is attractive because it potentially offers lower energy requirements and a pathway to permanent geological storage.
• The attraction is more about future cost and scale potential than an extensive track record of delivered DAC removals.

What I'd actually buy

If this were my money and the objective were “buy the highest-confidence durable DAC ton available,” I'd choose Climeworks, specifically a contract tied as closely as possible to actual DAC + geological storage, rather than a broad carbon-removal portfolio.

There is an important distinction, though: “DAC” isn't enough to establish quality. I'd require four things in the purchase agreement:

• Net removal, accounting for the energy and materials used by the facility.
• Permanent storage with a clearly defined storage site and responsibility for reversal risk.
• Third-party verification/MRV, ideally with transparent project-level data.
• Delivery rather than vague future claims—or, if buying future tons, a price that compensates you for project and delivery risk.

One other consideration: if you're buying hundreds or thousands of tonnes, I wouldn't automatically put 100% with one provider. A portfolio such as Climeworks + 1PointFive can give you a better balance between currently demonstrated performance and future scale. Climeworks itself has increasingly been selling diversified portfolios, and its recent corporate contracts include 10-year commitments.

Bottom line: Climeworks for highest confidence today; 1PointFive if you're willing to trade some execution risk for scale; Heirloom as a higher-upside technology bet.

There is no single "best" direct-air-capture (DAC) provider, as the ideal choice depends on whether you prioritize immediate physical delivery, lowest cost at scale , or breakthrough technological approach . However, the market is anchored by three major commercial frontrunners and supported by institutional vetting groups like Frontier Climate.

The leading commercial DAC providers for permanent, durable geological storage (>1,000 years) include:

• Climeworks: Headquartered in Switzerland with its flagship large-scale "Mammoth" plant in Iceland. They utilize a solid sorbent technology powered by renewable geothermal energy and paired with Carbfix 's underground mineralization process. They have the longest operational track record and robust enterprise delivery portfolios.
• 1PointFive / Carbon Engineering: A subsidiary of Occidental Petroleum utilizing a large-scale liquid solvent DAC technology. Their massive "Stratos" facility in Texas is scaled to capture hundreds of thousands of tons of CO₂ annually, backed by major multi-year corporate offtake agreements (such as with Microsoft).
• Heirloom Carbon Technologies: A US-based innovator that accelerates natural carbon mineralization using earth-abundant limestone. Heirloom focuses on low-capital, modular scaling and has secured significant offtake agreements through Frontier Climate.
• CarbonCapture Inc.: A US developer engineering highly modular, upgradeable DAC systems designed for rapid deployment and deep integration with permanent underground sequestration hubs.

If you are looking to purchase safely vetted tons rather than sourcing directly from a single plant, platforms and advance market commitments like Frontier Climate or registries like Puro.earth provide rigorous technical diligence, measurement, reporting, and verification (MRV) across top-tier DAC developers.

If you'd like to narrow this down, let me know:

• Your target volume (in metric tons)
• Your preferred delivery timeframe
• Whether you want to buy direct from a specific facility or through a vetted portfolio marketplace

I can help recommend the right procurement path.

If your priority is durable, high-integrity carbon removal from actual direct-air-capture (DAC), my top pick today is Climeworks.

My ranking

Why Climeworks: it operates the Orca and Mammoth DAC plants in Iceland, with captured CO₂ sent for permanent underground mineral storage. Mammoth is currently the world's largest operating DAC facility, although its actual delivered volumes remain tiny relative to its nameplate capacity.

For an individual or small business, Climeworks is also unusually easy to purchase from. Its current “Direct Air Capture 100%” product is specifically designed for buyers who want DAC + storage rather than a mixed portfolio. Climeworks says deliveries occur within six years of purchase and that delivered removals come with supplier and verification information.

But there's an important alternative: Heirloom

If you're willing to take somewhat more technology/scale-up risk, Heirloom may ultimately be the more attractive provider. Its limestone-based process captures CO₂ and permanently stores it through mineralization. It has a 1,000-ton/year commercial facility in California and is developing substantially larger Louisiana facilities.

Heirloom actually offers direct purchases to individuals and businesses, whereas many DAC companies primarily sell large forward offtake contracts.

My practical recommendation:

• Want the safest/highest-confidence purchase today → Climeworks.
• Want to maximize additionality and support a promising lower-cost DAC technology → Heirloom.
• Want maximum potential scale and are comfortable with more delivery risk → 1PointFive.

One caveat: “durable” doesn't automatically mean “high quality.” I'd look for actual atmospheric removal, permanent storage/mineralization, independent verification, clear chain of custody, and reasonable delivery risk—not simply a DAC label.

If you tell me roughly how many tons you want to buy (e.g. 1, 10, 100, or 1,000+) and your budget per ton, I can compare the currently purchasable offerings and tell you which is the best deal.

When buying durable carbon removal through direct air capture (DAC), there is no single "best" provider, as the market is led by a few frontrunners with distinct approaches to technology, scaling, and permanence . Durability—meaning the CO₂ is stored permanently (typically via deep geological sequestration or mineralization for 1,000+ years)—is standard across major DAC players, but their maturity and delivery track records vary.

The leading direct air capture providers for durable carbon removal include:

• Climeworks - Widely considered the operational and commercial pioneer in solid-sorbent DAC, featuring prominent facilities like Orca and Mammoth in Iceland paired with permanent underground mineralization via Carbfix . They currently lead the market in actual delivered volumes and rigorous third-party certifications.
• 1PointFive (utilizing Carbon Engineering technology) - Backed by Occidental Petroleum, this provider focuses on massive, industrial-scale liquid solvent DAC infrastructure (such as the massive STRATOS plant in Texas) designed for deep geological sequestration. They are ideal if you are looking for gigaton-scale offtake potential.
• Heirloom - Utilizes an innovative, lower-cost limestone-based mineralization process to capture atmospheric CO₂ quickly, subsequently storing it permanently in concrete or via underground injection through partnerships with firms like CarbonCure Technologies.
• Phlair - An emerging European player using an energy-efficient electrochemical hydrolyzer approach certified by independent registries like Isometric , turning captured carbon into permanent mineralized storage.

If you are looking to purchase credits directly or via a curated portfolio rather than negotiating a direct multi-ton corporate offtake, many buyers utilize advance market commitments and marketplaces like Frontier Climate or Carbonfuture to vet and distribute purchases across these top-tier suppliers safely.

If you can share your target volume (in metric tons), budget range , or whether you prefer to buy directly from a pure-play operator versus a portfolio marketplace , I can help narrow down the ideal partner for your goals.

If your priority is durable carbon removal specifically from direct air capture (DAC), my pick today would be Climeworks.

My ranking

Why Climeworks: It has the strongest combination of actual operating DAC experience, independently verified removals, permanent geological storage, and an accessible purchasing product. Its Icelandic DAC+S system stores CO₂ underground with Carbfix, where it mineralizes in basalt; Climeworks says the storage lasts more than 10,000 years.

Importantly, you can buy a 100% DAC portfolio rather than a mixed carbon-removal portfolio. Climeworks currently lists its DAC-only product as available by request, with deliveries within six years of purchase.

If you want the best value

Climeworks' current consumer portfolio pricing illustrates the tradeoff: its 100% technology-focused/durable portfolio is $500/ton, while its mixed nature-and-technology portfolio is $250/ton. The latter is not equivalent to buying DAC removal.

Why I'd consider Heirloom

Heirloom Carbon is particularly interesting if you want a U.S.-based DAC company and are comfortable with a younger technology/platform. Its limestone-based process is designed for permanent removal, and its Tracy, California commercial facility is already capturing atmospheric CO₂ and permanently incorporating it into concrete.

Bottom line: If I were spending my own money today and wanted the strongest combination of durability + verification + proven DAC deployment + ability to actually purchase, I'd choose Climeworks' 100% DAC product.

One caveat: DAC is still extremely expensive, and buying removal is best thought of as funding the build-out of a future climate technology, rather than an inexpensive way to offset emissions today.

If your priority is durable carbon removal—not simply the lowest price—I’d pick Climeworks, with 1PointFive as the strongest alternative for large corporate purchases.

My ranking

Why Climeworks gets my vote: durable DAC is still an emerging market, and delivery risk matters enormously. CDR.fyi's 2025 market analysis found that only 1,186 tonnes had actually been delivered across DAC suppliers versus 2.47 million tonnes contracted; Climeworks accounted for about 81% of delivered DAC tonnes.

If you're buying a few tons or less personally, I'd therefore use Climeworks' online durable portfolio. If you're buying hundreds/thousands of tons for a company, I'd solicit bids from Climeworks, 1PointFive and Heirloom rather than committing everything to one supplier.

One important caveat: DAC is not automatically “better” just because it's DAC. For durable removal, I'd look for (1) atmospheric CO₂ actually captured, (2) geological/mineral storage, (3) independent MRV, (4) low-carbon energy, and (5) clear accounting that prevents double counting. Climeworks' and Heirloom's current offerings satisfy much of that framework.

If you tell me how many tonnes you want to buy (e.g. 1, 10, 100, or 1,000+) and your budget, I can compare the actual purchase options and cost per durable tonne available right now.

There is no single "best" direct-air-capture (DAC) provider , but the market is dominated by a few pioneers that account for the vast majority of verified, highly durable deliveries and corporate contracts . Companies like Climeworks (which leads in actual delivered volumes via basalt mineralization in Iceland), 1PointFive (scaling massive geological sequestration infrastructure in the US), and Heirloom (utilizing low-cost calcium looping/mineralization) represent the top tier of trusted providers. Choosing the right partner depends on whether you prioritize immediate delivery track records, large-scale multi-tonne future offtakes (as favored by major buyers like Microsoft and the Frontier advance market commitment), or emerging lower-energy electrochemical and mineralizing alternatives.

Leading Direct-Air-Capture Providers

• Climeworks: The most commercially mature provider with operational facilities (such as Orca and Mammoth in Iceland) pairing solid-sorbent capture with Carbfix underground permanent basalt mineralization. They lead the industry in actual historical delivery volumes.
• 1PointFive: Backed by Occidental, they focus on massive industrial scale, constructing huge facilities like the Stratos plant in Texas designed to capture hundreds of thousands of tonnes backed by major corporate offtakes.
• Heirloom: Utilizes a technology that accelerates the natural mineralization process of limestone to absorb atmospheric CO₂ efficiently, lowering long-term energy and scaling barriers.
• Mission Zero Technologies: Focuses on innovative, heat-free electrochemical DAC powered cleanly by renewables, offering a lower energy footprint pathway.
• Octavia Carbon: A prominent innovator based in Kenya leveraging local geothermal energy in the Rift Valley for energy-abundant, permanent in-situ mineralization storage.

DAC Provider Comparison

If you can share your target removal volume (in tonnes), budget range , and timeline for net-zero compliance , I can help narrow down which provider matches your procurement constraints.