Heirloom Technologies

Heirloom Technologies

Direct Air Capture for carbon removal

About Heirloom Technologies

Simplify's Rating
Why Heirloom Technologies is rated
A
Rated A on Competitive Edge
Rated A on Growth Potential
Rated A on Differentiation

Industries

Energy

Social Impact

Company Size

51-200

Company Stage

Series B

Total Funding

$204M

Headquarters

San Francisco, California

Founded

2020

Overview

Heirloom Technologies focuses on reducing atmospheric carbon dioxide (CO2) levels through Direct Air Capture technology. This process extracts CO2 from the air and uses limestone to accelerate its transformation into rock, effectively mineralizing the carbon in just days. The company sells carbon removal credits, which allow businesses to offset their emissions by representing the permanent removal and safe storage of CO2. Heirloom aims to offer these credits at under $100 per ton of CO2 by 2035, making it a cost-effective option for companies striving for carbon neutrality. Unlike many competitors, Heirloom not only addresses environmental concerns but also contributes to the green economy by creating high-paying jobs in the environmental technology sector.

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Simplify's Take

What believers are saying

  • United Airlines' investment shows aviation sector interest in carbon removal credits.
  • U.S. Department of Energy supports Heirloom with up to $600 million, boosting credibility.
  • Heirloom's new facility in Louisiana by 2026 strengthens its U.S. market leadership.

What critics are saying

  • Increased competition may reduce Heirloom's market share and pricing power.
  • Regulatory changes could impact the profitability of Heirloom's carbon credit model.
  • Technological advancements by competitors could make Heirloom's technology obsolete.

What makes Heirloom Technologies unique

  • Heirloom uses limestone to accelerate carbon mineralization, a unique approach in carbon capture.
  • Their technology transforms CO2 into rock within days, ensuring permanent carbon removal.
  • Heirloom offers carbon removal credits, allowing companies to offset emissions affordably.

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Funding

Total Funding

$204M

Above

Industry Average

Funded Over

3 Rounds

Series B funding is typically for startups that have proven their business model and need more funding to expand rapidly—often by entering new markets or adding more products. Investors are usually venture capital firms that specialize in later-stage investments.
Series B Funding Comparison
Above Average

Industry standards

$35M
$45M
Linktree
$65M
Substack
$100M
ClickUp
$150M
Heirloom Technologies

Benefits

Covered health, dental and vision

Generous parental leave. 16 weeks paid leave for all Heirloom employees, regardless of primary/secondary caregiver status.

Generous stock options

Flexible time off. Unlimited PTO for exempt (salaried) employees & 80 hours for full time non-exempt (hourly) employees.

Stay healthy. Monthly health and wellness reimbursement.

Learn on the job. Robust annual education and conference budget, including airfare and hotel costs.

Growth & Insights and Company News

Headcount

6 month growth

↑ 4%

1 year growth

↑ 2%

2 year growth

↑ 13%
ESG Today
Feb 27th, 2025
United Airlines Backs Carbon Removal Tech Company Heirloom - ESG Today

United Airlines announced that its United Airlines Ventures (UAV) Sustainable Flight Fund has made an investment in Direct Air Capture (DAC) company Heirloom, alongside an agreement for the right to purchase up to 500,000 tons of carbon dioxide removal to make sustainable aviation fuel. Launched in 2023, the UAV Sustainable Flight Fund invests in and […]

WowTale
Dec 8th, 2024
Heirloom Carbon secures $150M funding

Heirloom Carbon, a carbon capture startup, raised $150 million in a Series B round led by Future Positive and Lowercarbon Capital, with participation from investors like Ahren Innovation Capital and Japan Airlines. Heirloom's technology captures CO2 from the air using a unique process involving limestone. The funds will be used to build a carbon capture facility in Louisiana by 2026. The company aims to reduce carbon removal costs to $200-$300 per metric ton by the early 2030s.

PR Times
Dec 5th, 2024
Heirloom Carbon secures $150M funding

MOL Switch LLC, a subsidiary of Mitsui O.S.K. Lines, has invested in Heirloom Carbon Technologies, a U.S. company developing Direct Air Capture (DAC) technology. This investment is part of a $150 million funding round, which includes other Japanese companies like Mitsui & Co. and Japan Airlines. Heirloom's DAC technology uses limestone to reduce costs and aims to remove 1 million tons of CO2 annually, supported by up to $600 million from the U.S. Department of Energy.

Business Wire
Dec 5th, 2024
Heirloom Raises $150 Million Series B to Rapidly Scale Commercial Direct Air Capture

Heirloom, America’s leading Direct Air Capture (DAC) technology provider, has raised $150 million in Series B funding. The round was co-led by Future

Nikkei
Dec 4th, 2024
Heirloom Carbon secures Japanese investments.

Four Japanese companies, including Mitsui & Co., Mitsubishi Corp., Mitsui O.S.K. Lines, and Japan Airlines, are investing in Heirloom Carbon Technologies, the first commercially operational U.S. business focused on removing carbon dioxide from the air.

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