What Mast Reforestation does

Mast Reforestation is a Seattle-headquartered, venture-backed climate tech company that operates a vertically integrated post-wildfire reforestation and biomass burial carbon removal platform. The company combines two acquired legacy nurseries — Silvaseed (Roy, Washington, founded 1871, acquired March 2021) and Cal Forest Nurseries (Etna, California, acquired August 2021) — to operate the largest private tree seed bank in the western U.S. and produce 30M+ seedlings annually across 11 western states. Mast serves private, public, and tribal landowners (e.g., Don Harland at Sheep Creek Ranch, the Gentry Family in Big Horn County) by delivering end-to-end post-fire reforestation services including cone collection, seed processing, nursery growing, site preparation, and planting, and extends these services into restorative carbon removal via engineered anoxic underground biomass burial chambers at projects such as Mast Wood Preserve MT1 in Cascade County, Montana.

Mast's technology stack centers on an engineered biomass burial chamber combined with a continuous Monitoring, Reporting and Verification (MRV) sensor network (subterranean temperature, humidity, and above-chamber methane sensors) designed to exceed Puro.earth's Terrestrial Storage of Biomass methodology specifications, certified at 100-year durability and rated 'A' pre-issuance by BeZero Carbon. Proprietary seed-zone tracking software, x-ray seed viability analysis, and a paid community cone-collector network feed the upstream supply chain. The company's carbon removal credits are issued through the Puro.earth registry, with MT1 representing the largest single issuance (4,277 CORCs) to date under that methodology. Mast also sells seed and seedlings through the Silvaseed Seed Sale storefront and engages in pipeline streaming financing (e.g., the $15M Carbon Streaming agreement in May 2023).

The business model is multi-stream: (1) transaction-fee carbon removal credit sales to corporate and institutional buyers (RBC, BMO, Bain & Company, Workato, HMC Architects, Rocky Talkie) via direct enterprise sales, carbon marketplaces (CEEZER), and portfolio providers (CNaught, Muir AI); (2) forward-sale pipeline financing via streaming agreements and convertible notes that fund reforestation without upfront landowner cost; (3) transaction-fee seed and seedling sales to commercial forestry operators; and (4) professional reforestation services for landowners. The company was founded as DroneSeed in 2015, acquired Silvaseed and Cal Forest Nurseries in 2021, rebranded to Mast Reforestation in October 2022, and raised a $25 million Series B in February 2025 co-led by Pulse Fund and Social Capital.

Name

Mast Reforestation

Legal name

Mast Reforestation

Website

https://mastreforest.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

51–100 employees

Short description

Mast Reforestation is a Seattle-based, vertically integrated post-wildfire reforestation and carbon removal company that pairs two acquired legacy nurseries (Silvaseed, Cal Forest) with engineered biomass burial to generate Puro.earth-certified carbon removal credits for corporate buyers and deliver full-cycle restoration for wildfire-affected landowners.

Ownership category

akta.pro rank

Product category

Carbon Removal & Reforestation Services

NAICS

Timber Tract Operations (11311), Support Activities for Forestry (1153), Sawmills and Wood Preservation (32111)

SIC

Forestry (800), Wholesale-Lumber, Plywood, Millwork & Wood Panels (5031)

akta.pro primary industry

Timberland Carbon & Natural Capital Project Development (Offsets/REDD+) (AFAMAKAH)

akta.pro secondary industries

Reforestation & Afforestation Services (Planting, Site Prep, Regeneration) (IMAMAAAE), Forestry & Ecosystem Carbon Removal (Afforestation/Reforestation, Improved Forest Management) (EUABAFAH)

Keywords

• Carbon removal credits
• Post-wildfire reforestation
• Biomass burial services
• Native seedling production
• Reforestation project management

Headquarters

HQ city

Seattle

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Carbon Removal Credit Sales: Primary revenue stream from the sale of durable, third-party verified biomass burial carbon removal credits (CORCs) to corporate and institutional buyers under the Puro.earth Terrestrial Storage of Biomass methodology. Sold to financial institutions, consultancies, and portfolio providers (RBC, Bain & Company, BMO, CNaught, Muir AI, HMC Architects, Workato, Rocky Talkie) with proceeds directly funding reforestation at the project site.
2. Project Financing / Streaming Agreements: Pipeline project financing via streaming agreements (e.g., US$15 million with Carbon Streaming in 2023) plus US$2 million convertible note, structured as forward sale of carbon credits generated by reforestation projects to fund operations without upfront landowner cost.
3. Seed and Seedling Sales: Direct sales of wild-collected conifer seed and seedlings via the Silvaseed Seed Sale inventory across Alaska, California, Oregon, Washington, Canada and Christmas/ornamental species, with tiered bulk pricing for 50+ lb orders.
4. Reforestation Services for Landowners: End-to-end post-fire reforestation services for private, public and tribal landowners including biomass burial enrollment, site preparation, snagging, cone collection, custom prescriptions, planting, and stewardship under conservation easements.

Pricing tiers

Go-to-market motion5 records

Distribution channels6 records

Marketing channels9 records

Core offering

Mast Reforestation generates verified carbon removal credits by burying fire-killed trees in engineered anoxic underground chambers across Montana, California, Oregon, and Washington, then uses credit sale proceeds to fund post-wildfire reforestation. It also sells native conifer seed and seedlings through its Silvaseed (Roy, WA) and Cal Forest (Etna, CA) nurseries and delivers project-based reforestation services to private, public, and tribal landowners.

Product overview

Mast Reforestation operates as a vertically integrated platform for post-wildfire reforestation and carbon removal rather than a single product. The core brand (Mast Reforestation) unifies seed sourcing and seedling production through its acquired nurseries — Silvaseed (Washington, acquired March 2021) and Cal Forest Nurseries (California, acquired August 2021) — with project execution across named reforestation sites (Henry Creek, Feather River Dome, Sheep Creek) and engineered carbon storage via the Biomass Burial Program. Its flagship biomass burial project, Mast Wood Preserve MT1 (Cascade County, Montana), generates the Carbon Removal Credits product issued under the Puro.earth Terrestrial Storage of Biomass (TSB) methodology, while Mast Films provides storytelling content supporting the overall offering.

Differentiator

Problem solved

Functional benefit

Brands

• Silvaseed (Silvaseed by Mast): Wild tree seed bank and seedling nursery operated by Mast since 2021; the longest-running nursery operation in the West, founded 1871 and based in Roy, Washington.
• Cal Forest Nurseries (Cal Forest)

Quantifiable outcome

• 9-month excavation-to-issuance timeline for MT1 (vs. 12–15 year industry norm for reforestation credits)
• +7 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered flagship, core and minor.

• Puro.earthflagshipStrategic or Co-development PartnerPuro.earth is the carbon registry under which Mast's MT1 biomass burial project issued 4,277 carbon removal credits — the largest issuance to date under Puro.earth's Terrestrial Storage of Biomass (TSB) methodology. Puro provides third-party validation, certification, and methodology framework; Mast's biomass burial projects are issued under Puro's TSB standard with 100-year durability certification.
• BeZero CarboncoreImplementation/ SI/ Consulting PartnerBeZero Carbon provides independent ratings for Mast's carbon removal projects. MT1 earned a pre-issuance 'A' rating from BeZero, with top 'aaa' additionality, 'a' carbon accounting and 'bbb' permanence — placing MT1 in the top 8% of non-nature-based carbon removal projects globally.
• SE Advisory Services (Schneider Electric)coreImplementation/ SI/ Consulting PartnerSE Advisory Services, the global consulting arm of Schneider Electric, supported client evaluation and their purchase of MT1 carbon credits; William Theisen, Commercial Director for Nature & Technology Based Solutions, publicly endorsed the project as supporting the growth of a credible, effective carbon market.
• CEEZERcoreChannel Partner/ Reseller/ DistributorCEEZER is featured as a carbon marketplace partner on Mast's homepage, providing distribution access to corporate carbon credit buyers.
• Direct Storage of Biomass (DSB) CoalitionminorOthersMast joined the Direct Storage of Biomass (DSB) Coalition, a Carbon Business Council initiative advancing best practices, policy alignment, and market understanding for biomass burial as a carbon removal pathway.
• Northwest Permanence FoundationcoreOthersThe Northwest Permanence Foundation will independently oversee 100-year monitoring, maintenance, and reporting at MT1 and other Mast biomass burial projects, ensuring continued data collection and site stability long after credit issuance.

Scale indicators21 records

Recent moves6 records

Expansion highlights6 records

Others

• Sylvera: Sylvera provides independent ratings and MRV for carbon credits — ecosystem participant that rates Mast's BeZero-style credit quality, comparable in function to BeZero Carbon.

Regional players

• American Forests: American Forests is a U.S. nonprofit reforestation organization working on post-fire restoration and tree planting — adjacent mission focus but operates as a nonprofit rather than a commercial credit seller.

Emerging players

• Heirloom Carbon Technologies: Heirloom uses DAC technology with limestone to capture CO2 — a competing durable carbon removal pathway targeting the same corporate voluntary market buyers as Mast.
• CarbonCapture Inc. CarbonCapture Inc. develops DAC technology for large-scale carbon removal — competes for the same corporate voluntary market procurement spend as Mast's biomass burial credits.
• Carbofex: Carbofex produces biochar from biomass as a carbon removal pathway — adjacent biomass-to-durable-removal approach with overlap in voluntary carbon market buyer base.

Broad incumbents

• Climeworks: Climeworks is the largest direct air capture operator globally, serving enterprise buyers seeking durable removal — overlaps with Mast's customer segment (corporates buying durable credits) and competes for the same procurement budgets.

Direct peers

• Pachama: Pachama is a marketplace and MRV platform for nature-based carbon credits, with strong overlap in forestry credits and corporate buyer procurement — directly comparable customer segment and product category to Mast's forestry carbon credits.
• Running Tide: Running Tide sequesters biomass (macroalgae) in ocean sinks as durable carbon removal — comparable biomass-to-durable-removal pathway and overlap with Mast in selling durable removal credits to enterprise climate buyers.
• Charm Industrial: Charm Industrial converts biomass into bio-oil and sequesters it underground as a durable carbon removal pathway — same durable, biomass-based removal category as Mast's biomass burial, with overlapping corporate buyer base (Microsoft, Stripe, Shopify).
• NCX (Natural Capital Exchange): NCX issues forest carbon credits from improved forest management across U.S. working forests — same corporate buyer procurement motion and forestry credit category as Mast's reforestation and biomass burial credits.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/7962521
• Xx.com/mastreforest

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 records

Subsidiaries2 records

Funding overview

Funding rounds15 records

Investors30 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A2 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mast Reforestation