Aerleum

Cover Block

Attribute	Value
Name	Aerleum
Tagline	Converts atmospheric CO2 to e-methanol via proprietary reactive capture process
Headquarters	Strasbourg, France
Founded	2023
Stage	Seed
Business Model	B2B
Industry	Cleantech / Climatetech
Technology	Hardware
Geography	Western Europe
Growth Profile	Venture Scale
Founding Team	Co-Founders (2)
Funding Label	Seed (total disclosed ~$6,000,000)

Links

• Website: https://aerleum.com/about-us/
• LinkedIn: https://fr.linkedin.com/company/aerleum

Executive Summary

Aerleum is a French climatetech startup converting atmospheric CO2 directly into e-methanol, a synthetic fuel for maritime and chemical sectors, using a proprietary integrated process that claims a significant energy advantage over conventional methods [Third Derivative, 2024]. The company’s relevance for investors centers on its pursuit of a cost target that could make renewable fuels competitive with fossil sources, a critical hurdle for decarbonizing hard-to-abate industries.

Founded in 2023 as a spinout from the Marble venture studio, the company secured a $6 million seed round in late 2024 led by 360 Capital, HTGF, and Bpifrance [EU-Startups, Oct 2024]. This capital is earmarked for building a pre-industrial module designed to produce 30 tons of methanol annually, representing the step from lab validation to a scalable prototype [EU-Startups, Oct 2024].

Over the next 12-18 months, the primary signal will be the performance and cost data from the first pre-industrial module. Success in demonstrating the claimed 30% energy reduction at this scale, and progress toward the stated $500-per-ton cost-parity roadmap, will determine whether Aerleum transitions from a promising lab project to a credible industrial contender.

Data Accuracy: YELLOW -- Core facts (funding, founding, technology claim) are corroborated by multiple sources; team details and product metrics rely on single-source profiles.

How the Company Got Here

Aerleum was founded in June 2023 as a spinout from Marble, a climate venture studio, with initial support from Bpifrance and the Région Grand Est [EU-Startups, Oct 2024]. The company operates from its headquarters in Strasbourg, France. The founding team, Steven Bardey and Sébastien Fiedorow, launched the venture from a small lab in the city, focusing on validating the core reactive capture technology [Third Derivative, 2024].

The company's primary milestone to date is a $6 million seed round closed in October 2024, led by 360 Capital with participation from HTGF, Bpifrance, and Norrsken [EU-Startups, Oct 2024]. This capital is earmarked for building a pre-industrial demonstration module designed to produce 30 tons of methanol annually from atmospheric CO2 [EU-Startups, Oct 2024]. Aerleum showcased its technology at CES 2025 in January [YouTube, Jan 2025].

Data Accuracy: YELLOW -- Founding details and seed round corroborated by multiple outlets; specific founding date and initial studio backing cited by a single source.

Product and Technology

The core proposition is a hardware system that integrates carbon capture and fuel synthesis, an approach intended to reduce the energy penalty that typically makes carbon capture and utilization (CCU) expensive. Aerleum’s process uses a proprietary bifunctional material that both captures CO2 from ambient air and converts it into e-methanol in a single, integrated step, a method the company claims reduces energy consumption by approximately 30% compared to conventional CCU pathways [Third Derivative]. The company has validated this process at lab scale [CB Insights, ~Oct 2025]. The technology is designed for modular deployment, with a pre-industrial module under development that is reported to have an annual production capacity of 30 tons of methanol [EU-Startups, Oct 2024].

Target applications are explicitly for hard-to-abate sectors where direct electrification is challenging, namely maritime shipping, heavy transport, and chemicals manufacturing [Third Derivative]. A publicly stated technical goal is to achieve cost parity with fossil-based methanol, targeting a production cost of $500 per ton within a five-to-six year timeframe [Third Derivative].

Data Accuracy: YELLOW -- Core technology claims are cited from a portfolio profile and a company snapshot; capacity and funding details are from a single trade publication.

Where the Demand Sits

The market for sustainable fuels is driven by hard-to-abate sectors facing binding decarbonization mandates, creating a clear, time-bound demand for alternatives to fossil-based methanol.

Aerleum's target addressable market is defined by the global demand for methanol in maritime, chemical, and heavy transport applications. The company cites a target production cost of $500 per ton to achieve parity with fossil methanol within five to six years [Third Derivative, 2024]. The global methanol market was valued at approximately $30 billion in 2023 and is projected to grow, with green methanol demand driven by new regulations like the FuelEU Maritime initiative.

Key demand drivers are regulatory and sector-specific. The maritime industry is under pressure from the International Maritime Organization's 2050 net-zero target. The chemical industry is seeking sustainable feedstocks to meet corporate Scope 3 emissions goals. European Union policies, including the Renewable Energy Directive (RED III) and the Carbon Border Adjustment Mechanism (CBAM), create financial incentives for low-carbon fuels.

Data Accuracy: YELLOW -- Market sizing relies on analogous third-party reports; company-specific TAM/SAM not publicly confirmed. Regulatory drivers and sector demand are well-documented.

Competitive Landscape

Aerleum's competitive position hinges on a single-step chemical process, a technical distinction that separates it from the two-step capture-and-conversion systems that define most of the carbon-to-fuels landscape.

Metric	Value
Aerleum Funding	$6,000,000

The competitive map splits along two primary axes: source of CO₂ and conversion pathway. Incumbent chemical engineering firms like Carbon Engineering (acquired by Occidental) and Climeworks dominate the pure carbon capture from air (DAC) segment. Aerleum operates in the narrower challenger segment of DAC-to-fuels, competing with firms like ReCarbon on thermochemical pathways and Kvasir on electrochemical routes. Aerleum's process is designed for atmospheric, or “dilute,” CO₂ streams, whereas several competitors are optimized for richer, point-source emissions [Third Derivative, 2024].

Data Accuracy: YELLOW -- Competitor profiles are drawn from Crunchbase categorization; Aerleum's differentiator is cited from a portfolio source (Third Derivative) and a news report.

Opportunity

If Aerleum can scale its integrated capture-conversion process to the promised $500 per ton cost target, it would unlock a direct, capital-efficient path to synthetic fuels for some of the world's most carbon-intensive industries.

The headline opportunity is to become a primary supplier of green methanol to the maritime shipping industry. The International Maritime Organization's 2023 strategy commits the industry to net-zero greenhouse gas emissions by or around 2050 [IMO, 2023]. Aerleum's integrated process, which aims to cut energy use by 30% compared to conventional CCU methods [Third Derivative, 2024], positions it to compete on cost and efficiency.

Data Accuracy: YELLOW -- Growth scenarios and market context are constructed from general industry trends and the company's stated targets; the specific catalysts and comparable are illustrative.

Sources

1. [EU-Startups, Oct 2024] Strasbourg-based Aerleum raises €5.5 million | https://www.eu-startups.com/2024/10/strasbourg-based-aerleum-raises-e5-5-million-to-rework-co₂-capture-and-conversion-technology/
2. [Third Derivative] Aerleum Portfolio Profile | https://www.third-derivative.org/portfolio/aerleum
3. [CB Insights, ~Oct 2025] Aerleum Company Profile | https://www.cbinsights.com/company/aerleum
4. [YouTube, Jan 2025] Aerleum makes E-fuels out of Air: CO₂ Capture & Conversion (CES 2025) | https://www.youtube.com/watch?v=EP-JJ46MvkE
5. [Steven Bardey LinkedIn, 2026] Steven Bardey, PhD - Aerleum | https://www.linkedin.com/in/steven-bardey-phd-948763b7/
6. [RocketReach, 2026] Sébastien Fiedorow Profile | https://rocketreach.co/sebastien-fiedorow-email_42818549
7. [IMO, 2023] 2023 IMO Strategy on Reduction of GHG Emissions from Ships | https://www.imo.org/en/MediaCentre/PressBriefings/pages/Revised-GHG-reduction-strategy-for-global-shipping-adopted-.aspx
8. [Maersk, 2023] Maersk orders six large methanol-enabled vessels | https://www.maersk.com/news/articles/2023/03/22/maersk-orders-six-large-methanol-enabled-vessels