The UK's legally binding net zero target doesn't get delivered by one technology or one company. It gets delivered by dozens of businesses each working on a different part of the same problem, each making the next piece slightly easier to solve.

Hydrogen sits near the centre of that effort. Not because it solves everything, but because it solves the things that electrification can't heavy industry, long-haul freight, high-temperature process heat. And the UK companies building out this sector deserve more attention than they typically get.

Here are the top UK hydrogen companies worth knowing about.

1. Hydrogen Transition Energy (HTE)

HTE approaches the hydrogen economy from a different angle to most companies on this list: waste.

Non-recyclable materials plastics, tyres, automotive shredder residue, medical waste currently go to landfill or incineration. They have no recycling route and represent a genuine disposal burden. Our plasma-assisted gasification process, operating above 3,000°C, converts those materials into fuel cell grade hydrogen meeting ISO 14687 standards, captured CO₂ for industrial reuse, and inert vitrified slag that works as construction aggregate.

Two problems solved simultaneously a waste stream that costs money to dispose of becomes clean hydrogen that industry needs. Our Manston facility in Kent is the UK's first industrial-scale project of this type, with further sites planned in Cwmbran, the Midlands, Belfast, and Perth.

Read more - https://hydrogen-te.com/bbc-plans-for-hydrogen-production-plant-submitted

2. Ceres Power

Ceres doesn't get talked about enough outside specialist circles. They develop solid-oxide fuel cell and electrolyser technology a higher-temperature process that, when optimised, is more efficient than conventional PEM electrolysis.

Their model is licensing-based, which sets them apart. Rather than building and selling hardware themselves, they license their technology to large industrial partners who manufacture at scale. Licensees include Weichai in China and Doosan in South Korea. It's a slower commercial burn, but one with global reach that doesn't require Ceres to build factories on every continent.

3. GeoPura

GeoPura replaces diesel generators. That's it and it matters more than the pitch sounds.

Diesel generators are widely used in construction, events, film production, and anywhere temporary power is needed. They're dirty, loud, and operate in urban areas where air quality is already a concern. GeoPura's hydrogen power units produce zero direct emissions and are already in active commercial use across the UK.

It's not glamorous. But replacing diesel generators with hydrogen is exactly the kind of practical, scalable progress that net zero is built from.

4. AFC Energy

Founded in 2006 and listed since 2007, AFC Energy develops alkaline fuel cell systems that generate clean electricity from hydrogen. Their systems are designed for stationary power applications the kind of reliable, zero-emission generation that industrial and commercial operators need as an alternative to fossil-fuelled backup power.

They sit in the £100m–£150m market cap bracket and are building toward commercial-scale deployment after years of technology development. A business still finding its commercial feet, but with technology that has genuine application in the net zero transition.

5. HiiROC

The most technically distinctive company on this list. HiiROC's Thermal Plasma Electrolysis process splits methane into hydrogen and solid carbon without combustion, without CO₂ release. The solid carbon byproduct isn't waste either it has commercial uses in tyres, inks, and construction materials.

Centrica partnered with them to inject hydrogen into the UK gas grid for the first time at Brigg Power Station in North Lincolnshire a genuine milestone, not a pilot study. If HiiROC's cost profile holds up at commercial scale, it changes the economics of hydrogen production meaningfully.

6. Hygen

Less well-known than some on this list, but doing concrete work. Hygen produces and operates low-carbon hydrogen facilities across the UK, focused specifically on hard-to-abate industrial sectors the parts of the economy where emissions are most stubborn and alternatives are thinnest on the ground.

Their model is to produce hydrogen close to where it's needed, reducing transport costs and the infrastructure gap that slows adoption. Practical and unglamorous, which in this industry is often a compliment.

7. ITM Power

The biggest name in UK-based green hydrogen production, and for good reason. ITM manufactures proton exchange membrane electrolysers the machines that split water into hydrogen and oxygen using renewable electricity.

The numbers are moving in the right direction. Revenue climbed nearly 58% to £26 million in fiscal 2025, and the company has raised its 2026 guidance to between £40 million and £43 million. They've been selected as technology partner for two major projects in Germany totalling 710 MW. They also have partnerships with Linde the world's largest industrial gas company and Shell.

Not profitable yet. But building the kind of manufacturing scale that brings costs down for everyone.

What These Companies Have in Common

Different technologies. Different markets. Different commercial stages. But the thread running through all of them is that they're doing specific, buildable, operational things not just publishing roadmaps.

The UK government's hydrogen strategy has set a 10 GW low-carbon hydrogen production target by 2030, backed by the Hydrogen Allocation Round, the Net Zero Hydrogen Fund, and the Green Industries Growth Accelerator. That policy framework is pulling in over £400 million of private capital and creating hundreds of direct jobs across the sector.

The companies on this list are part of that. They're not waiting for the hydrogen economy to arrive. They're building it.

FAQ

Which UK company is the largest hydrogen producer?

ITM Power is the largest dedicated green hydrogen operator in the UK by market presence, revenue, and electrolyser manufacturing capacity. For waste-derived hydrogen specifically, Hydrogen Transition Energy is developing the UK's first industrial-scale facility of its kind at Manston in Kent.

Is the UK government actually funding hydrogen companies? 

Yes. The Hydrogen Allocation Round has committed real capital the first round alone saw over £400 million of private investment committed upfront, with more than 700 direct jobs created. Additional support comes through the £240 million Net Zero Hydrogen Fund and the £960 million Green Industries Growth Accelerator. The policy direction isn't perfect, but the money is moving.

Why does the UK need multiple approaches to hydrogen production? 

Because different sectors need different things. Green hydrogen from electrolysis suits locations with cheap renewable electricity. Waste-to-hydrogen suits regions with large non-recyclable waste volumes and local industrial demand. Thermal plasma approaches like HiiROC's suit situations where methane feedstock is available without the emissions penalty. No single technology handles everything which is why a mix of approaches is the right strategy, not a weakness.