Waste to Hydrogen Companies: Who Is Actually Running

Every list of waste to hydrogen companies you will find today is sorted on the wrong variable. Startup databases rank on capital raised. Analyst listicles rank on brand size, which is how industrial gas majors end up at the top of a category they buy into rather than build. Neither number tells a buyer the only thing that matters: has this company converted waste into hydrogen, on what feedstock, and for how long.

The sector is small enough that you can check. As of April 2026 the pure-play field is 18 active companies, 6 of them funded, having raised 82.9 million dollars in total over ten years, with the highest funded holding about 35 million. That is a rounding error next to a single gigafactory. It is also the entire evidence base, so the sensible thing is to read it project by project.

What follows sorts the field into five brackets: operating, permitted and financed, in development, piloting, and failed. We are in it, in our own bracket, with the hours behind our number.

Four different processes hide under one label

Before comparing companies, separate the routes. Cost per kilogram quoted across these four means nothing, because they are not the same plant, the same feedstock or the same risk.

Thermal gasification, then shift and separation

Heat waste in a starved-oxygen reactor, crack the hydrocarbons into syngas, then use the water-gas shift reaction and a separation stage to lift hydrogen out. This is the classic route, it is where what is actually in the gas gets decided, and it is written out reaction by reaction in how the gasify, shift and separate chain works.

Plasma-assisted gasification

Same chemistry, more heat. Boson Energy uses plasma as a heat source and for vitrifying the ash after the gasification stage rather than driving the reaction directly, which it says minimises carbon combustion and lifts hydrogen yield, with downstream steam methane reforming and water-gas shift doing the actual hydrogen work. The trade is honest and worth naming: the torches draw power, so net hydrogen depends on whether that power comes from the grid or from the plant's own output.

Non-combustion steam and CO2 reforming

Raven SR does not gasify at all. Its process is non-combustion and non-catalytic, driven by indirect electric heating, requires no fresh water as feedstock and uses less than half the energy of electrolysis. Different failure modes, different permitting class, as its own project history shows below.

Anaerobic digestion, biogas upgrading and reforming

The route most often mislabelled. Here microbes make biogas, the biogas is upgraded to biomethane, and a steam reformer turns that into hydrogen. There is no gasifier anywhere in the plant. It is a wastewater treatment asset with a reformer bolted on, its economics live or die on how much biogas sewage sludge actually yields, and it is a genuinely different business from thermal conversion of mixed municipal waste. Both are legitimate. Confusing them is how buyers end up comparing a digester's operating record with a gasifier's brochure.

Operating: the short list

Two entries survive on published evidence, and they are not comparable to each other.

Hyundai Motor Group, HTWO ENERGY Cheongju, South Korea. The Group opened its first Group-operated integrated waste-to-hydrogen production and refuelling facility, converting biogas from locally sourced wastewater sludge into roughly 500 kilograms of hydrogen a day, with a plan to reach two metric tonnes a day by 2030. Commercial production started in May 2026 at 99.97 percent purity, drawing on more than 100,000 tonnes of Cheongju organic waste a year and supplying refuelling stations across North Chungcheong Province. This is the anaerobic digestion route, and it is the strongest commercial evidence in the category: hydrogen with a customer, a purity spec and a delivery address.

Zero-X, COMETHA, Paris. Our X-150 ran 1,939 consecutive hours, processed 16,382 kilograms of digestate pellets and delivered 33 percent hydrogen in the syngas at an H2/CO ratio of 1.95:1 in oxy-steam mode with zero nitrogen ballast. That is a measured campaign on a 150 kg/h thermal platform, not a commercial hydrogen offtake. Say which one you have, and the comparison stays useful.

Permitted and financed, not yet built

This bracket is where the visible activity is, and where reading dates carefully pays.

Raven SR, Richmond, California. Raven holds the final air permit and authority to construct from the Bay Area Air District for a facility processing up to 99 wet tons of organic waste a day into about 2,400 metric tonnes of renewable hydrogen a year, at a cost that has risen to roughly 75 million dollars, financed through private equity rather than federal grants. The schedule lesson is in the permitting, not the reactor: it took more than three years, the project had to abandon a solid waste facility permit for a biomass conversion permit, which removed food waste from the feedstock slate and left yard waste, agricultural residues and untreated construction wood, with launch expected in 2027. A permit class change rewrote the feedstock contract. Budget for that.

BEEAH and Chinook Hydrogen, Al Sajaa, Sharjah. Phase one is 7 tonnes of hydrogen a day, commissioning in Q2 2027, on technology independently assessed at TRL 6 to 7. Credible, well capitalised, and future tense.

Wildfire Energy, Queensland. In July 2026 the Queensland government awarded 18.56 million dollars from its Sovereign Industry Development Fund for phase 1 of the Bulwer Island Biofuels Hub, a first-of-a-kind commercial reference plant producing up to 1.4 megawatts of continuous electricity from bio-syngas, with methanol and aviation fuel in later phases. Note that phase 1 sells electricity. Hydrogen is a later product, which is a normal and sensible sequencing choice, and also not what the company name suggests to a skimming reader.

In development, and how long that stage lasts

SGH2, Lancaster, California. The design is the largest number in the category: 12,000 kilograms of hydrogen a day from 40,000 tonnes a year of mixed paper waste, with ten-year offtake agreements signed and Munich Re underwriting a complete plant output guarantee. Permits were granted years ago. It is not built. Signed offtake and an insurer's wrap are strong commercial evidence and weak operating evidence, and the two are not interchangeable.

Boson Energy, Gippsland, Australia. A Sustainable Fuels Precinct delivered by Zerogen with Boson Energy and Xseed Solutions has been approved, built on a six-year demonstration plant in Israel, with further precincts in France and Sweden. A six-year demo is a serious credential. An approved precinct is a planning decision.

Wildfire's pilot data, as a model of good disclosure. Its 1 tonne per day pilot has completed more than 90 separate gasification runs across a range of feedstocks and was upgraded in 2023 with a gas engine plus syngas compression and a PSA unit to produce purified hydrogen. Run count, scale, and what was added when. That is what a pilot page should look like, whoever publishes it.

The graveyard, and what it should teach you

Fulcrum BioEnergy. Backed by aviation and waste majors and the US Department of Defense, with a biorefinery designed for 11 million gallons a year of synthetic crude, which produced approximately 6,000 gallons in its initial operations before the Chapter 11 filing on 9 September 2024 and a 15 million dollar stalking horse bid for the assets. It shipped a small amount of synthetic crude in late 2022, hit problems with its gasification system, shut down completely in May 2024, and reported a net worth of negative 420.3 million dollars that October before WM and Switch bought the pieces. Several roundups still list it as an active waste-to-energy company.

Plagazi. In October 2024 the company announced a 29.5 million euro award from the EU Innovation Fund for the Koping Hydrogen Park plasma gasification project, granted after the municipality had already terminated the partnership that May. No plant was built in Koping, Hylte or Gavle, and the company filed for bankruptcy on 22 December 2025 after a court-supervised reconstruction.

Read those two together and the conclusion is uncomfortable but useful. Blue-chip backing and a nine-figure grant award are inputs. They are what other people believed about a company, priced before the plant ran. They are not evidence, and a list that ranks on them is ranking on belief.

Six questions that score any waste to hydrogen company

1. Which of the four routes is it? If the answer is vague, the rest of the diligence is guesswork. Gasification, plasma-assisted gasification, non-combustion reforming and digestion-plus-reforming have different capital structures and different things that go wrong.
2. Which feedstock, and what is its ash content? Clean wood and sorted paper prove very little. High-ash sewage sludge, mixed municipal waste and digestate are where fixed-grate systems clinker and stop, and where the sludge case gets its own economics under hydrogen from sewage sludge. Our platform has been validated at Paris COMETHA, at Verkoso with Fraunhofer IKTS and at Hochschule Zittau/Goerlitz on exactly those feeds.
3. Held for how many continuous hours on that feedstock? Not a commissioning day, not a best run. A duration. If the vendor cannot give you one, you have been shown a test result.
4. Is that number a hydrogen fraction or a hydrogen purity? Thirty-three percent in raw syngas and 99.97 percent after separation are both true statements about different points in a plant. Ask which point, and never compare across the two.
5. Who holds the permit, in what class, and how long did it take? Raven's five-year path is not an outlier. Permit class determines feedstock, feedstock determines the gate fee, and the gate fee is the contractual revenue line.
6. What cleans the gas before the catalyst? Every expensive item in a hydrogen train sits downstream of the dirtiest gas in the plant. Ours is SyngaPure, which removes 99 percent of tar compounds while maintaining energy efficiency. The wider argument for why a conversion percentage without an inlet loading is not a specification is in tar removal from syngas.

Where Zero-X sits on this list

Not at the top, and not by funding. We are not operating a commercial hydrogen offtake and we do not claim one.

What we have: the first Zero-X waste-to-hydrogen reactor became operational in Paris in May 2024, fed by household waste and sewage sludge, and produced the 1,939-hour campaign above. Our gas cleaning system was selected for support under the German BMWK go-inno programme in December 2025. And rather than building every plant ourselves, we license territories to partners, which is why the containerised 150 kg/h class matters more to us than headline tonnage, and why the wider case sits with small-scale waste-to-energy systems and with government grants for waste to energy.

Apply the six questions to us as hard as to anyone else here. A category with this much future tense in it only improves if buyers start asking for durations.

FAQ

Which waste to hydrogen company is the largest?

It depends which yardstick you mean, and the two disagree. By capital raised, the best-funded pure play sits at roughly 35 million dollars in a sector that has raised about 82.9 million in a decade. By announced plant output, the biggest design is SGH2 Lancaster at 12,000 kilograms a day, which has not been built. By hydrogen actually delivered to customers, the answer today is a 500 kilogram per day facility in South Korea.

Is waste to hydrogen the same thing as green hydrogen?

Not in the strict sense. Green hydrogen usually means electrolysis powered by renewable electricity. Waste to hydrogen is a thermochemical or biological conversion of a residue, and its carbon intensity depends on the route and on what happens to the separated CO2, not on a colour label.

Can I buy a waste to hydrogen plant off the shelf?

No supplier in this category sells a catalogue product at commercial scale yet. What is available is a licensed platform plus engineering, or a project development agreement. Anyone quoting a fixed turnkey price without naming your feedstock has not priced your project.

Do waste to hydrogen companies need government subsidy to work?

At current scale, effectively yes, and the honest vendors say so. Public capital support and gate fees are what close the gap against incumbent hydrogen production, which is why grant capability is a real selection criterion rather than a nice-to-have.

How do I check a company's claims independently?

Ask for the third-party institution that witnessed the run, not the marketing deck. Permits are public records, insolvency filings are public records, and a plant with a named validation partner and a stated duration can be verified with two phone calls.