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Allow AllAtmen automates and derisks certification workflows across renewable fuels, from real-time supply chain data to auditable product claims.
Bring clarity and control to your certification journey, whether you are working in green hydrogen, e-methane, ammonia, biomethane, HVO or SAF.
It’s a challenge for business developers selling a green premium, engineers calibrating supply chains, procurement teams optimising the intake of the right feedstocks, and supply chain managers integrating regulatory constraints into their daily workflows.
With 30+ industrial supply chains already onboarded, Atmen combines frontier technology with deep regulatory expertise to help you stay ahead in a fast-moving certification landscape.
Think of Atmen as the technology layer on top of operational supply chains, enabling continuous compliance and streamlining the official sustainability certification workflows. At scale and across borders.
You can manage your entire audit preparation directly in Atmen's platform. This feature helps you collect documents, reconcile data, and generate audit-ready reports, with checklists and reminders based on your certification scheme. Invite external auditors, share granular data, and automatically generate key evidence like mass balances and sustainability proofs.
Atmen is built for teams where compliance can't be an afterthought.
Roles for admins, operators, viewers, POS issuers and auditors, assigned per organisation. People see and act on what their role covers, and nothing more.
Evidence and controls carry an explicit status through the audit cycle, set by the auditor who reviews them. You can always see what has been validated and what is still waiting.
We connect Atmen to your IdP for enterprise deployments, using SAML 2.0 or OIDC. Available on request, set up with our team as part of onboarding.
Your data sits in Frankfurt by default. If your regulator or your policy requires a different region, we deploy a dedicated instance there.
ISO 27001 certified · Encrypted in transit (TLS 1.2+) · Atmen Solutions GmbH
See our certificate and policies →Auditability is the backbone of Atmen: a traceable, defensible record behind every claim a producer issues.
Every user action is logged in the backend as it happens, with the account and timestamp behind it.
Invite external auditors to access granular, auditable data remotely and track audit progress in real time.
Activity logs, evidence and audit controls can be exported as CSV, Excel or zip files, ready to hand to your auditors.
ACTIVITY LOG
Saved yearly by our customers
Primary data coverage of key ingredients within first 3 months
(Munich, March 10, 2026) Last week, Germany took a significant step toward closing remaining gaps in renewable fuel regulation. The Bundestag held the first reading of the Second Law on the Development of the Greenhouse Gas Reduction Quota, which will transpose RED III into national law and, for the first time, introduce explicit quotas for green hydrogen and e-fuels in the transport sector.
While most of Europe works toward RED III compliance, industrial offtakers are already demanding certified molecules as regulatory deadlines near. Siemens, Atmen, and TURN2X, all based in Munich, have developed the first end-to-end model for RED III-ready renewable gas production, from automated plant operations to certified product delivery. The plant of the future is already running at TURN2X's first commercial e-methane plant in Miajadas, Spain.
TURN2X produces climate-neutral e-methane by combining green hydrogen with biogenic CO₂. The company plans to scale this model across Europe, aiming to cover 10 percent of Germany’s gas demand by 2031. Miajadas demonstrates the commercial viability of this pathway, with 100 percent of its renewable gas output sold under long-term off-take agreements.
Siemens provides the industrial backbone for this model, including advanced automation systems, digital twin technology for remote plant operation, and standardised, secure deployment of future facilities.
Siemens adopts an ecosystem approach, collaborating with leading partners such as Atmen rather than developing every component in-house. “This is exactly how we at Siemens want to go forward in renewable energies,” says Philipp Glaser, Siemens Digital Industries. “We want to partner with the best solutions so our customers get innovation, technology, and speed of implementation.”
Atmen, a regulatory technology company, provides the certification data layer. At Miajadas, this enabled the site to reach full RFNBO certification, making automated compliance part of day-to-day operations.
“Certification isn’t a nice-to-have; it’s market access and business case realization,” says Flore de Durfort, CEO of Atmen. “Our platform turns operational data into verifiable, auditable proof that keeps production continuously certification-ready so that renewable fuel producers can scale with confidence.”
For TURN2X, combining Siemens’ industrial technology with Atmen’s compliance layer creates a blueprint for rapid, reliable expansion.
“Scaling across Europe brings two challenges: maintaining operational excellence and meeting increasingly complex certification requirements for renewable fuels,” says Dr. Dominik Schollenberger, CTO of TURN2X. “The Miajadas plant shows that when intelligent operations and built-in compliance come together, e-methane can scale with the reliability our customers expect.”
The three companies share a single goal: scaling green energy production with intelligence, trust, and speed.
The plant of the future isn’t a vision. It’s running today in Miajadas.
About TURN2X
TURN2X develops and operates projects using its proprietary technology to produce e-methane by combining biogenic CO₂ with green hydrogen. The company focuses on scalable, infrastructure-ready renewable gas solutions that support industrial decarbonization and energy security.
About Siemens
Siemens AG (Berlin and Munich) is a leading technology company focused on industry, infrastructure, mobility, and healthcare. The company’s purpose is to create technology that transforms everyday life for everyone. By combining the real and the digital worlds, Siemens empowers customers to accelerate their digital and sustainability transformations, making factories more efficient, cities more livable, and transportation more sustainable. A leader in industrial AI, Siemens leverages its deep domain know-how to apply AI – including generative AI – to real-world applications, making AI accessible and impactful for customers across diverse industries. Siemens also owns a majority stake in the publicly listed company Siemens Healthineers, a leading global medical technology provider pioneering breakthroughs in healthcare. For everyone. Everywhere. Sustainably. In fiscal 2024, which ended on September 30, 2024, the Siemens Group generated revenue of €75.9 billion and net income of €9.0 billion. As of September 30, 2024, the company employed around 312,000 people worldwide on the basis of continuing operations. Further information is available on the Internet at www.siemens.com.
About Atmen
Atmen (atmen.co) is a regulatory technology company providing the data infrastructure that powers trusted certification of industrial products. Atmen focuses on automating certification and enabling large-scale, verifiable supply chain transparency across energy-intensive industries.
Founded in January 2023 by energy and regulation experts Flore de Durfort, Quentin Cangelosi, and Erika Degoute, Atmen has raised €6.3M to date to build technology that certifies industrial goods, starting with renewable gases.
Headquartered in Munich, the company's platform is deployed across industrial sites in 9 countries, automating certification workflows and enabling verifiable proof of product attributes throughout the supply chain.
By Alejandra Patricio, Content Manager at Atmen
Hydrotreated vegetable oil (HVO), a renewable alternative to fossil diesel, usually comes at a higher price than its fossil counterpart.
But in September 2026, the premium for HVO100, its pure, unblended form, narrowed to an estimated 4–8 cents per liter at many German gas stations, according to figures reported by Münchner Merkur. Given the different implications of renewable and fossil diesel for sustainability and energy security, coming this close to price parity is worth a closer look.
Curious to see the difference for myself, I ventured into a cold, gray Berlin afternoon and headed to a gas station near Friedrichshagen. On October 28, HVO100 was priced at €2.229 per liter, compared with €2.209 for fossil diesel. Only 2 cents apart.
But what's behind these unusually close prices? Geopolitical disruptions have sent fossil diesel prices soaring, but Germany's energy taxes, CO₂ pricing and GHG quota have also played a role, each in a different way.
Unlike fossil diesel, which is refined from crude oil, HVO is produced by treating oils and fats with hydrogen, using feedstocks that can include used cooking oil and animal fats.
Its lifecycle greenhouse gas emissions can differ significantly from those of fossil diesel. HVO’s sustainability performance depends on factors such as its feedstocks, production process and supply chain.
The war involving Iran and disruptions around the Strait of Hormuz have put significant pressure on global oil markets, driving prices sharply higher.
In Germany, diesel prices rose from a monthly average of €1.69 per liter in January 2026 to a record €2.39 in September, according to ADAC, the country's largest automobile association.
HVO prices also rose, but less sharply. Unlike fossil diesel, which is closely tied to global crude oil and petroleum product markets, HVO follows a different feedstock and production cost structure. When produced from European waste oils and fats, it can be less directly exposed to disruptions in conventional oil supply, although wider energy and feedstock markets still influence its price.
But market forces are only part of the equation. Taxation and regulatory incentives add another layer to the economics of both fuels.
Three regulatory mechanisms are particularly relevant to understanding the price relationship between fossil diesel and HVO.
To ease the impact of the energy crisis, in 2026 Germany's Bundestag and Bundesrat approved two exceptional temporary tax cuts, applied equally to both fossil diesel and equivalent renewable fuels, including HVO.
The first applied from May 1st through June 30th, followed by a second from October 1st expiring on December 31st, unless extended.
In both periods, the energy tax was then reduced by 14.04 cents per liter, equivalent to roughly 17 cents including VAT.
To illustrate the impact, the graphic uses estimated average pump prices of €2.22 per liter for fossil diesel and €2.28 for HVO. Under normal tax rates, these would be approximately €2.39 and €2.45, respectively, assuming unchanged market conditions and full pass-through of the tax reduction. Our spot check in Berlin on October 28 found an even narrower gap of 2 cents.
Under Germany’s national emissions trading system (nEHS), fuel suppliers must purchase allowances for the CO₂ emissions associated with fossil diesel. This cost, equivalent to roughly 8% of its current pump price, helps narrow the price gap between HVO and fossil diesel.
Certified HVO is exempt from this CO₂ charge, provided its sustainability is documented through a valid Proof of Sustainability (PoS).
Germany's GHG reduction quota (THG-Quote) requires fuel suppliers to achieve emissions reductions of 12% in 2026 and 17.5% in 2027, under §37a of the Federal Immission Control Act.
Relying solely on fossil fuels means meeting these obligations through other eligible emissions reductions at additional cost. Selling qualifying HVO, by contrast, helps meet the quota, creating a financial incentive to supply renewable fuel at the pump.
From a chemical perspective, HVO and fossil diesel might look alike. Yet their sustainability performance and resilience to supply disruptions can differ significantly. As fuel markets and regulatory requirements evolve, these differences increasingly affect how fuels are priced and valued.
For fuel suppliers, having the right infrastructure to distinguish fossil from non-fossil fuels is essential to future-proofing their business. The sustainability and emissions data associated with each fuel batch must travel with the product throughout the entire supply chain, all the way to the pump.
Atmen helps HVO traders and operators continuously compile, validate and trace this information, ensuring it is robust, evidence-backed and ready for certification and audits.
Mainly because fossil diesel became much more expensive during 2026. Diesel in Germany rose from a monthly average of €1.69 per liter in January to a record €2.39 in September, according to ADAC, driven by supply disruptions around the Strait of Hormuz. HVO prices rose less sharply. Germany’s CO₂ price, which applies only to fossil diesel, and the GHG quota also contributed. By September 2026, HVO100 cost an estimated 4–8 cents more per liter than diesel at many German gas stations, according to reporting by Münchner Merkur, and an Atmen spot check in Berlin on October 28 found a gap of just 2 cents.
It is treated as fossil fuel. Under §37a of Germany’s Federal Immission Control Act, biofuels without valid, recognized proofs cannot count towards the GHG quota, and they are not exempt from the national CO₂ price. A valid Proof of Sustainability records how the fuel was produced and its lifecycle emissions. It is what turns HVO’s lower emissions into economic value for fuel suppliers.
Neither. Both temporary cuts applied equally to fossil diesel and renewable fuels such as HVO: 14.04 cents per liter, about 17 cents including VAT, first from May 1 to June 30, 2026 and again from October 1 to December 31, 2026, unless extended. The cut lowers pump prices for both fuels.
Last reviewed: November 2, 2026. Fuel prices and temporary tax measures are time-sensitive; figures refer to the periods indicated.
© Copyright Atmen 2024 and Beyond
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Designed By The Sourdough
