Terradot

Snapshot

Terradot is a Stanford-born enhanced rock weathering (ERW) company that grinds basalt, spreads it across Brazilian farmland, and sells the resulting carbon removal as durable credits. Founded in 2022 inside Scott Fendorf's soil biogeochemistry lab, the company has raised roughly $58.2M in equity led by John Doerr (Dec 12, 2024 close, per BusinessWire) and a $34M senior secured term loan from HASI on Oct 29, 2026 — the largest disclosed ERW debt facility to date. As of its own November 2026 disclosures it has deployed more than 100,000 tonnes of CDR, treated 20,000+ hectares, contracted 1.4M+ tonnes against buyers that include Frontier, Google and Microsoft, and employs about 75 people, two-thirds of them in São Paulo state. The thesis is that Brazil's tropical weathering rates, its clean grid (~93%), its ag logistics and its dense basalt quarry network produce the lowest unit economics in the category; the counter-thesis is that nobody yet agrees on how to measure what's actually being removed.

Founding story

Terradot came out of Stanford's Soil and Environmental Biogeochemistry Lab in 2022. The academic anchor is Dr. Scott Fendorf, a Stanford Earth System Sciences professor with more than three decades in soil chemistry, who serves as Chief Scientist. The commercial anchor is CEO James Kanoff, a Stanford alum who co-founded The Farmlink Project (a food-recovery nonprofit) and was a UCLA Pritzker Emerging Environmental Genius finalist in 2021. The product anchor is co-founder and CPO Sasankh Munukutla, a Stanford AI graduate with tours at Microsoft, Uber, Accel and Pear, and a 776 Climate Fellow. Valor Capital incubated the entity in Brazil. The team has since added Julia Marisa Sekula (CFO, ex-Morgan Stanley), Connor Sendel (CCO, ex-BCG), and in 2025, Izabella Teixeira — Brazil's former Environment Minister — as a senior advisor, a hire that matters more than the usual advisor headline in a country where ground operations in six states depend on regulatory goodwill.

How it works

The chemistry is old; the operations are new. Terradot sources natural silicate basalt from a network of Brazilian quarries, grinds it to high surface area, and spreads it across row-crop farms (soy, corn, coffee, with rice confirmed in the south). Rainwater and soil acids dissolve the silicate; the reaction consumes CO2 and converts it into bicarbonate ions that travel through soil, rivers and ultimately the ocean, where they persist on geologic timescales. Crucially, Terradot places its operational hubs adjacent to quarries, which cuts the single largest cost line in ERW — hauling rock. The Sentinel Site in São Paulo state, co-funded with Microsoft, is the company's measurement spine: deep groundwater wells, in-situ soil sensors, surface-water stations, soil-core and sediment-drilling campaigns, reactive transport modeling, watershed-scale accounting and geostatistics feed a process-based MRV stack. Credits are "measured by Terradot, validated by third parties." Puro.earth's ERW methodology was approved and endorsed by Frontier in 2026; Terradot has not publicly named its primary registry.

Product and business overview

The product is a tonne of durable, additional CO2 removal with a 1,000+ year storage horizon, bundled with MRV documentation satisfactory to corporate buyers and (eventually) compliance regimes. The "challenger" positioning rests on three things working together: (1) geography — Brazil's warm, wet climate accelerates weathering kinetics relative to US or European deployments; (2) grid — Brazil's grid runs roughly 93% clean, which matters for a process whose supply chain is grinding and trucking; and (3) proximity — quarry-adjacent hubs trim diesel, the cost line that has sunk other ERW operators. Partnerships with Embrapa Cerrados on agronomy protocols, and the Teixeira advisory, suggest the company knows its moat is a political-economic one as much as a geochemical one.

Business model and pricing

Terradot sells tonnes of removal under forward offtakes, denominated in dollars, delivered over multi-year windows. Known deals: Frontier bought 90,000 tonnes for $27M with delivery between 2025 and 2029, implying roughly $300/t. Google's December 2024 contract covers 200,000 tonnes for delivery by 2029 at an undisclosed price (it was Google's largest CDR purchase at the time). Microsoft signed a 12,000-tonne deal on April 3, 2025, with deliveries 2026-2029, plus the Sentinel Site co-funding. The September 2026 "World's Largest ERW Project" — 1M t CO2e in methane reductions by 2030 plus 1M t of permanent removal by 2040 on 200,000+ ha of Rio Grande do Sul rice — was priced, per Reuters' reporting, above $100/t but below prior Google deals. Translation: Terradot is sliding down a cost curve from ~$300/t toward something closer to $100-$150/t on large rice deployments. Revenue is not disclosed, but 1.4M contracted tonnes implies a multi-hundred-million-dollar deliverables book.

Traction over time

The curve bends sharply. In December 2024, Terradot had placed 48,000 tonnes of rock on 1,800 hectares. By November 2025, management disclosed 5,000 active hectares, a team of 75+, and a 2026 target of 600,000 tonnes of rock across 25,000 hectares. As of its own November 2026 numbers, 100,000+ tonnes of CDR have been deployed, 20,000+ hectares treated, and 1.4M+ tonnes contracted. The HASI debt facility (Oct 29, 2026) is earmarked for deploying 1M tonnes of rock across 60,000 hectares in the US and Brazil across 2026-2027, so the operational step-change is arriving. The acquisition of Eion Carbon (February 2026) added US olivine deployments and patented MRV tooling, consolidating the North American half of the category.

Market analysis

McKinsey's 2050 base case puts the CDR market at $300B-$1.2T in annual value, supplier revenue of $250B-$900B, and cumulative capex of $6T-$16T. ERW's per-tonne cost range sat at $120-$800/t as of 2023. Oliver Wyman projects CDR could reach $100B somewhere between 2030 and 2035. Three tailwinds matter: SBTi's 2025 update opened the door to removals inside science-based targets; CORSIA Phase 2 (eligible from 2027) creates aviation-driven demand; and US 45Q preserves a tax credit even in a more hostile climate-policy environment. The overriding reality is that today's ERW demand is voluntary — a market that softened visibly in 2024-2026. Terradot's survival in the near term is a bet on a handful of hyperscaler-and-ally balance sheets; its decade-out prize is a bet on compliance regimes forcing durable removals into mandatory frameworks.

Competitive intel

The pure-play ERW landscape is small and converging. InPlanet is the closest direct rival — also Brazil-based, also basalt, also tropical farms, with roughly $5.8M raised across its pre-seed and seed (2023). Lithos Carbon ($6.29M seed, 2022) attacks US row crops. UNDO Carbon (UK/US) is an XPRIZE finalist. Mati Carbon won the $50M XPRIZE Grand Prize in April 2025 for a smallholder-farmer ERW model in India, which pressures Terradot's narrative that Brazil is uniquely suitable. Silicate (Ireland) operates on alkaline concrete fines, a different feedstock. And Eion, Terradot's most mature US-side competitor, is now owned by Terradot after the February 2026 acquisition — Axios Pro framed the deal against a falling climate market, which is precisely when category consolidation happens. Different-modality competitors include Heirloom (DAC-mineralization), Climeworks (DAC at $500-$1,000/t) and Charm Industrial (bio-oil injection); they compete for the same buyer budget but on different cost and durability curves.

History and evolution

2022: founded at Stanford. 2023: early Brazilian pilots and seed round of $4.2M. December 12, 2024: $54M Series A (total $58.2M) led by John Doerr with Microsoft's and Google's first direct ERW equity checks; same week, $27M Frontier offtake and 200K-tonne Google offtake. April 3, 2025: Microsoft 12K-tonne offtake and Sentinel Site. November 2025: first verified credits expected by year-end, 5,000 ha active, team past 75. February 2026: Eion acquisition. September 2026: "World's Largest ERW Project" with Google on Rio Grande do Sul rice. October 29, 2026: $34M HASI debt facility. Each milestone compounded the last — a reminder that in frontier climate categories, early reputational capital is a self-reinforcing moat until an MRV scandal breaks it.

What people say

The case for

The bull case starts with geography and grid: Brazil is the lowest-cost place on the planet to weather basalt at scale, and Terradot has locked up quarry adjacency, academic credibility (Fendorf), political cover (Teixeira) and buyer anchors (Frontier, Google, Microsoft) others cannot replicate on the same timeline. The HASI debt facility is a leading indicator — project-finance lenders underwrite cash flows, not stories, and a $34M senior secured facility implies HASI's diligence team got comfortable with the offtake book. The Eion acquisition, in a weak market, buys US optionality and patented MRV tooling at a discount. Credit prices may compress, but Terradot is sliding down the cost curve fast enough to survive it.

The complaints

The bear case is MRV. Munir et al.'s Frontiers in Climate paper (2024/2026) argued that geochemical and mineralogical assumptions inflate quantified ERW removals. Milkywire's framework-level critique is that "process-based" MRV — soil-pore water, reactive transport modeling — risks overstatement relative to mass-balance field verification. CarbonPlan's Tyler Kukla raised in-river CO2 outgassing concerns that cut at the durability claim itself. Agronomy risk is real: tropical soils can mobilize trace metals (Ni, Cr) from basalt. Farmer uptake is operationally fiddly. Kanoff himself acknowledged "snakes" and carbon-measurement challenges to Axios Pro in January 2025. A Brazil-geography moat and a marquee buyer list do not settle the underlying scientific debate — they just postpone it.

Outlook: the open question

Does Terradot's process-based MRV survive contact with independent, mass-balance field verification at scale?

For Terradot to work, the following must be true: the Sentinel Site data and reactive transport models must line up within a defensible band against mass-balance watershed measurements as third-party registries and academics interrogate them; in-river CO2 outgassing must prove to be a solvable accounting adjustment rather than a durability-killer; voluntary buyer demand must hold above $100/t long enough for the Rio Grande do Sul rice program and the HASI-funded 60,000-ha deployment to prove unit economics; compliance regimes (CORSIA Phase 2, SBTi-eligible removals, 45Q) must pull ERW into mandatory frameworks before Frontier and Google buyer concentration becomes an existential liability; and Brazil must remain operationally friendly — no FX blowup, no regulatory whiplash on rural deployments.

For Terradot to fail, any one of the following would likely suffice: a credible, published mass-balance study showing process-based ERW over-credits by more than ~30%; a registry-level invalidation or cancellation event against an ERW cohort (the biochar playbook); an agronomic incident in tropical soils around trace metals; a hyperscaler buyer pulling back, which concentrates downside sharply given the top-three buyer mix; or a Mati/InPlanet cost-leadership breakout that reframes the category as commodity faster than Terradot's $300/t Frontier legacy book can roll off.

How to attack it

A new entrant should not try to out-Brazil Terradot. The quarry adjacency, Embrapa relationships, Teixeira-level political cover and Stanford-lab pedigree are compounding assets that would take five years and a nine-figure check to replicate, and even then Terradot would still be ahead on buyer relationships.

Three attack vectors are more promising. First, own the measurement layer rather than the deployment layer. An independent MRV company that sells mass-balance field verification as a service — to registries, to buyers, to competitors — captures value regardless of which operator wins. If Munir et al. and Milkywire are directionally correct, a credible neutral measurement standard is the single highest-leverage asset in ERW, and Terradot structurally cannot be the one to build it because it is also the seller. Second, attack the feedstock. A company that can prove a non-basalt silicate (olivine, wollastonite, mine tailings) weathers faster or cheaper on specific soils could underprice Terradot in geographies where its basalt-quarry adjacency is weakest — notably Southeast Asia, Sub-Saharan Africa and the US Midwest. Mati's smallholder model and Eion's olivine work both hint at this; the Eion acquisition tells you Terradot thinks so too. Third, attack the buyer: build an ERW-specialist offtake aggregator that gives mid-cap corporates a diversified ERW portfolio rather than a single-vendor concentration, which is exactly the shape of risk a corporate sustainability team sees when it looks at Terradot's dependence on Google and Microsoft. The real attack surface is the underwriting, not the chemistry.

Adjacent-segment play

The adjacent play is rice. Terradot's September 2026 Google partnership in Rio Grande do Sul combines alternate wetting-drying (AWD) rice management — which cuts methane — with basalt amendment for permanent CO2 removal. That stack is a template: methane abatement credits plus durable removal credits sold from the same hectare, with partially shared MRV infrastructure. Rice covers ~165M ha globally; the methane problem is the single largest agricultural climate forcing after cattle; AWD is already a mature practice in parts of Asia. A company built explicitly around the rice stack — methane crediting as the near-term revenue, durable ERW removal as the long-duration tail — could be a larger business than pure-play ERW, because the methane credits price higher today and the removal credits provide the decade-out option value. Adjacent plays in sugarcane (Brazil's largest crop) and coffee (where Terradot already operates) follow the same logic: find the row crop where a non-ERW abatement benefit cross-subsidizes the removal cost, and the economics work three years earlier than they do on commodity row crops alone.

Sources and further reading

• BusinessWire, "Terradot Raises $58.2M to Scale Enhanced Weathering in Brazil" — December 12, 2024
• AgFunderNews, "Terradot and the Brazil ERW thesis" — February 2026
• Reuters, "Google signs world's largest ERW deal with Terradot on Brazil rice" — September 2026
• Axios Pro Climate Deals, "Terradot acquires Eion as climate markets soften" — February 2026
• Carbon Herald, "Inside Terradot's Sentinel Site" — 2025
• Frontier / Stripe, Terradot offtake prospectus — 2024
• Munir et al., Frontiers in Climate, "Geochemical and mineralogical pitfalls in ERW quantification" — 2024/2026
• CarbonPlan (Tyler Kukla), "In-river outgassing and ERW durability" — 2024
• McKinsey, "Carbon removals: how to scale a new gigatonne industry" — 2023
• HASI press release, "HASI closes $34M senior secured facility with Terradot" — October 29, 2026