$15 billion was invested internationally throughout the climate, electric mobility, and sustainability industries in the first half of 2026. This investment has essentially stabilized following a series of market corrections; however, investment has rapidly concentrated on deploying products physically, with less emphasis placed on software advancements.
This article provides an in-depth analysis of the business model, commercialization status, and technology of major private and new publicly traded clean tech startups engaged in this sector.
Market Growth and Spending Trends for Clean Tech Startups
Despite increasing capital levels from recent decreases, the current capital invested in this industry is lower than that of 2021 and 2022. According to data from Crunchbase, approximately $8 billion was invested during Q2 of 2026. This amount is the highest quarterly investment level since 2024. However, the capital invested no longer rewards generic 'green' or environmental-themed products.
Investors and enterprise clients now require direct pathways to commercialization that address raw electricity demand, electric grid constraints, and industrial emissions. Of all the driving factors for this shift in capital, the demand for raw electricity is paramount.
Global electricity demand is forecasted to increase at an average of 3.5% per year until at least 2030. The International Energy Agency anticipates that by the year 2030, renewable energy and nuclear will account for 50% of the world energy mix. This presents a considerable challenge to build out the required physical infrastructure.
Startup companies providing only carbon accounting software will find the market to be oversaturated. The majority of the capital will be directed toward heavy industrial hardware, nuclear development, fusion energy, and physical electric grid technologies.
Main Types of Physical Technology
Carbon Capture and Heavy Industry
Current market data indicates a significant gap between consumer-facing green brands and heavy industrial technology. A substantial portion of the financial development will be derived from physical industries.
Metals such as cement, steel, and chemicals are unable to simply turn to solar to reduce emissions, as their manufacturing processes generate CO2. This has prompted significant investment in the form of carbon capture and utilization, which is also known as direct air capture and carbon removal.
Because these operations require heavy capital investment in large-scale complex facilities, they are generally only purchased by corporations who purchase carbon credits to offset their own carbon emissions.
Production and Storage of Renewable Energy
Renewable energy is utilized based on the storage capabilities of the intermittent nature of energy generation. In order to maintain stability in the grid, significant storage capacity must be available for both battery and thermal buffers.
This includes significant engineering investments in sodium-ion materials as an alternative to lithium-ion, modular thermal storage systems that can store high temperatures, and enhanced nuclear power generation capabilities (the highest risk and the greatest opportunity).
Resource Recovery and Circular Economy
The cost of extracting new minerals is very high and very politically complex; the entire electric vehicle supply chain depends on recycling end-of-life materials (product recovery).
The technologies for dismantling batteries and recovering raw materials, along with converting agricultural waste into biofuels, are in high demand from enterprise customers. The market for this technology does not include the general public, but instead major automotive and industrial manufacturers.
How These Companies Make Money and Set Prices
Currently, pricing is not standardized in this sector. Potential buyers will not find pricing tiers that are consistent with current software-as-a-service pricing structures.
These organizations are engaged in providing industrial goods, pilot programs, sustained infrastructure development, and engineering services. Therefore, their pricing structures are largely determined through bidding or through long-term energy contracts. For example, a new organization that sells modular nuclear reactors or thermal energy storage solutions on a factory scale cannot provide an example of a monthly subscription fee on its website.
In contrast, there are several distinct categories of revenue models associated with such companies. In one case, the company uses an energy-as-a-service model wherein the end user only pays for the energy used; they do not purchase the hardware that generates that energy.
In another example, licensing agreements allow established manufacturers to sell the rights to use the company’s patented chemical processes. In cases involving carbon removal companies, the company's revenue comes from selling certified carbon credits on a per-ton basis. When evaluating these clean tech startups, the lack of publicly available pricing is not indicative of a lack of transparency; rather, this is the normal way to sell heavy infrastructure.
Verified List of Clean Tech Startups
The following profiles represent a sample of technologies that have been continually supported by market intelligence, government funding, and academic research. They have been grouped according to what the companies intend to sell and how they support their claims with verified evidence. This grouping allows the clear distinction to be made between market-verified facts and unverified statements made by the companies themselves.
1. Fervo Energy
Fervo Energy is a provider of advanced geothermal technologies.
They take advantage of horizontal drilling techniques used in the oil and gas industry and apply them to access geothermal heat sources. Their market has validated their methods on a very high level. After their initial public offering of $1.9 billion, their market capitalization reached approximately $8.6 billion. Their target markets include large utility providers and technology companies who rely upon stable, renewable power for their data centers.
2. X-Energy
X-Energy designs and builds small modular nuclear reactors and manufactures its own proprietary nuclear fuel.
The company’s technology is designed to provide a zero-carbon baseline level of electricity at a considerably smaller physical footprint than is typical of conventional nuclear power plants. X-Energy had an IPO that raised $1 billion and was subsequently valued at just over $5 billion. The company is targeting customers including utilities, large industrial energy consumers, and government entities. Pricing for these large-scale physical infrastructures is not yet standardized.
3. Stegra
Stegra is focused on decarbonizing industrial-scale processes and specifically, is focused on the decarbonization of heavy manufacturing processes such as producing steel using green technologies.
The amount of capital needed to create an industrial-scale business in this area is substantial. Stegra raised $1.6 billion in funding, with Crunchbase reporting the company will have a significant shift in investment towards heavy manufacturing infrastructure as opposed to lighter-weight software application markets.
4. Helion Energy
Helion Energy is attempting to commercialize fusion power. Historically, fusion was only a laboratory experiment; now, private investors have begun to put money into the fusion process with the expectation that fusion will be sold commercially within a defined time period.
Helion Energy has raised $465 million in Series G funding and has a reported post-money valuation of $15.5 billion. If Helion Energy is successful in its mission, the target customer base for Helion Energy will be all utilities around the world. Technical risk for Helion Energy remains a reality until Helion Energy can produce a net positive energy reaction.
5. Climeworks
Climeworks is developing technology to efficiently remove carbon dioxide directly from the air using direct air capture (DAC) technology. Climeworks’ plants employ very large fans and a series of chemical filters to extract carbon dioxide from the atmosphere.
Climeworks has raised approximately $946.1 million in funding as it develops its DAC technology. The company’s business model relies upon selling carbon dioxide removal (CDR) services to companies and individuals.
Pricing for CDR services can vary significantly based upon the quantity of carbon dioxide being removed and the corresponding deployment of Climeworks’ technology.
6. Slate Auto
Slate Auto is an electric mobility and vehicle technology company. As the number of electric vehicles continues to grow and the supply chain that supports them continues to need significant funding, Slate Auto is well-positioned.
Recently, Slate Auto successfully completed a $650 million Series C financing round that demonstrates the company has achieved high levels of traction in commercializing and deploying the technology.
7. Inertia
Inertia is a company that continues to promote the growth of high-value industrial technologies. Recently, Inertia closed a $450 million Series A financing round that is an unusual size when compared to a typical Series A round for traditional software companies.
It is, however, an expected amount of funding for a climate technology company that is in need of a factory, a complex supply chain, or advanced materials science to develop the minimum viable product.
8. Circu Li-ion
As the name implies, Circu Li-Ion focuses on the dismantling, remanufacturing, and repurposing for a 'second life' of batteries. According to the European Institute of Innovation & Technology, Circu Li-ion can successfully extract approximately 90% of the total energy stored within a battery.
It is estimated that through its processes, Circu Li-ion will reduce CO2 emissions by about 48% when compared to the traditional lifecycle of a battery. Potential customers include battery manufacturers, electric mobility companies, and battery recyclers.
9. Kraftblock
Kraftblock is a modular high-temperature energy storage device that is designed to store high temperatures (up to 1,300°C) and can use recycled materials as the bulk of its component materials.
Kraftblock has been designed to be easily transportable. The primary market for Kraftblock's systems is the industrial sector, including the steel, glass, chemical, and food manufacturing industries. Kraftblock does not publicly disclose pricing for any of its products.
10. Altris
Altris is developing a Prussian White chemistry-based battery. This battery utilizes raw materials that can be found in nature: salt, wood, iron, and air. They have chosen to develop a battery chemistry that does not rely on the use of lithium and cobalt.
It is designed for stationary energy storage, electric mobility, and for the general manufacturing of batteries in many different markets. Custom and enterprise pricing information is not made available to the public due to the nature of the industry they serve (heavy supply chain).
11. Cylib
Cylib is recycling batteries after they've reached the end of their life, as well as scrap that may have been generated during their manufacture. The company has developed a proprietary technology to chemically break down the material to obtain reusable raw materials to be re-used in the manufacturing process.
The main customers for Cylib are automotive companies and battery manufacturers who are looking to guarantee the supply of minerals and to comply with the new regulations surrounding the recycling of batteries. Pricing for Cylib's recycling service is determined by the specifics of each individual project.
12. Aerones
Aerones develops systems for the inspection and maintenance of wind turbines using robotic technology. The maintenance of wind turbine blades (multiple and very large) creates safety hazards and costly expenses for both onshore and offshore wind-turbine farms.
The systems are intended to alleviate the risk to workers who have to perform maintenance on the wind turbines. Aerones's customers are wind farm owners and operators. Aerones's contract pricing information is tightly controlled and is not available to the public.
13. Pivot Bio
Pivot Bio develops and manufactures microbial-based products for use in agriculture to help support crops in getting or using nitrogen. Pivot Bio was created to decrease the reliance of the agriculture industry on synthetic fertilizers which have a significant carbon footprint.
Pivot Bio manufactures a product line for corn, wheat, and sorghum. The primary market for Pivot Bio is in commercial agriculture. Pricing for Pivot Bio products is highly dependent upon the crop type and size of the farm.
14. Xampla
Xampla produces biodegradable materials from the proteins found in plants. Their biodegradable materials are intended to be used as direct replacements for single-use plastics.
The target audience is made up of brands within the homecare, food, personal care, and packaging industries that have regulatory pressure to eliminate plastic from the entire supply chain. This company's business model uses a quote basis for pricing, which is probably comprised of a materials licensing agreement and a bulk supply contract.
15. Chakr Innovation
Chakr Innovation captures pollutant emissions in the form of particulate matter from diesel generators. After capturing soot from diesel generators, the soot is reprocessed into a commercial pigment.
This is then sold to purchasers such as organizations that operate large industrial plants, and companies that buy or sell air-pollution controls for diesel generators; diesel generators are the primary source of power for back-up/continued power generation.
16. CorPower Ocean
CorPower Ocean produces devices that convert wave energy into electricity.
According to EIT, the company employs a technique known as wave-responsive pumping, and the company uses the power take-off method to convert ocean wave energy into electrical energy.
The primary buyers of CorPower's technology are large utility companies and companies that develop or build offshore energy facilities, as well as companies that operate and manage coastal infrastructure, including a wide array of utilities, as well as electric vehicle manufacturers, shipping and boat manufacturers, and private interprovincial transportation companies.
17. MASH Makes
MASH Makes products that take agricultural waste and convert it to biofuel and/or long-term carbon-storing products.
According to EIT, the company establishes small production facilities close to the sites where agricultural feedstocks will be available to optimize low transport expenses. MASH's business model consists of selling the physical biofuel to shipping and heavy industries as well as generating carbon credits that are sold to corporate buyers.
MASH's pricing structure varies based on the credit markets of the day and the project's scope.
18. Econic Technologies
Econic Technologies develops a catalyst for chemical companies, which can now incorporate captured carbon dioxide into polyurethane and other polymer materials produced by chemical manufacturers.
According to EIT, this technology is capable of substituting carbon dioxide directly for oil inputs in the production of plastic. The intended audience consists of plastic manufacturers and the suppliers that provide the components needed to manufacture automotive, mattress, and shoe products. Neither the cost for licensing nor for individual projects is available to the public.
19. Instagrid
Instagrid produces portable battery systems that replace diesel-powered generators. EIT indicates that these battery-powered systems will provide clean, mobile power at a level similar to that which can be obtained from a standard wall outlet.
The intended audience is comprised of construction sites, outdoor activities, and industries that use power at a work site. Prices for equipment vary greatly based on the model and location of the product.
20. CarbonBridge
CarbonBridge transforms waste gases, such as methane and carbon dioxide, into valuable chemical products using gas fermentation.
According to TechCrunch, CarbonBridge uses bioreactors in the fermentation process. Customers include industrial manufacturers, owners of gas, and chemical producers that want to convert waste into usable products. Pricing is not publicly available.
21. Emobi
Emobi offers a cloud-based platform for developing something that would provide a universal electric vehicle (EV) charging network.
According to TechCrunch, the Emobi platform will bring together numerous EV networks and legacy charging hardware, enabling secure and automatic charging for vehicles.
The customer target market includes charging network operators, commercial property owners, and mobility service providers. The pricing structure for enterprise customers is based on quotes only and is not publicly available.
22. COI Energy
COI Energy has developed a marketplace and predictive analysis software to assist with the management of excess energy capacity.
TechCrunch stated that the company utilizes a proprietary artificial intelligence software platform to provide predictive energy use analysis. Customers include large commercial campuses, utilities, and industrial energy managers looking to enhance their power use. The pricing structure for the software is unknown.
23. HKG Energy
HKG Energy develops silicon-based materials for lithium-ion batteries. According to TechCrunch, the firm asserts that its products offer up to an 80% improvement in battery performance and a cost reduction of 40% relative to conventional battery products.
Battery manufacturers are the intended customers. These are unproven claims made by the company. Independent verification of these statistics is necessary prior to acceptance as actual business opportunities.
24. MacroCycle Technologies
MacroCycle Technologies has developed patented technology that allows for the recycling of woven polyester into plastic resins. The primary target customers of MacroCycle Technologies include textile manufacturers, retail brands, and plastic resin purchasers.
Once again, TechCrunch cites that the company claims its recycled plastic product can be purchased at the same price as virgin plastic resins. As with all newly developed materials technologies, these figures are aspirational goals set by MacroCycle Technologies, not third-party verified and proven financial performance.
25. Ganiga Innovation
Ganiga Innovation utilizes robotic technology with artificial intelligence (AI) within the waste sorting and processing arena through its patented Hoooly product.
TechCrunch outlines how Hoooly can process recyclables in a way that provides users with analytics on potential ESG compliance for corporations. The key customers for Hoooly are large industrial sites, enterprise campuses, and airports, but pricing is not available regarding Hoooly equipment or service contracts.
26. Carbon Negative Solutions
Carbon Negative Solutions utilizes an AI-driven process to convert wasted industrial materials and minerals into cement products.
According to TechCrunch, Carbon Negative Solutions asserts that their cement products can be manufactured using existing construction equipment while continuing to produce carbon-negative results. Cement producers and developers of infrastructure products are targeted customers for Carbon Negative Solutions' cement products. This company asserts it has a carbon-negative status, but it is still awaiting independent verification.
27. Gemini Energy
Gemini Energy offers non-combustion fuel cell technology for generating on-site electrical power at data centers and industrial facilities troubled by serious restrictions on their electrical supply from traditional utility companies.
A TechCrunch article states that Gemini's fuel cell units can be deployed to users within a few months, as opposed to the years typical of conventional investment-grade utility systems. The company's pricing is undisclosed.
28. HomeBoost
HomeBoost sells energy assessment tools for homeowners to perform on their own.
In a TechCrunch article describing the product, custom hardware is included along with a smartphone scanning application and an energy report generated by an expert. Target buyers include homeowners, energy efficiency programs, and consumers hoping to take advantage of government rebates for home energy improvements. Pricing for HomeBoost's products during the time of review was unavailable.
How to Review and Evaluate These Companies
The available market is saturated with lists ranking companies based on funding level and/or editorial interest. Funding is a useful discovery mechanism for identifying emerging companies; however, it is a poor proxy for assessing quality or commercial viability.
To conduct a true and accurate comparison of these technologies, enterprise purchasers, investors, and corporate sustainability managers will need to put aside the marketing claims surrounding them, and instead use a proven evidence-based evaluation format. Technologies that work in laboratory environments must do so within the parameters of the economic realities associated with industrial deployment to be valuable.
When evaluating clean tech startups, it is necessary to assess them based on three key criteria:
- Commercial Readiness Indicators: Has the product entered commercial use and is generating repeat revenue, or is it still in research and development, and/or pilot testing stages?
- Deployment Environment Compatibility: Does the system properly address a defined operational issue for a given utility or manufacturer, or does it provide an undefined benefit to the environment or society?
- Capital and Infrastructure Cost Implications: Is the technology compatible with existing infrastructure, or does it require significant investments in new plant construction, extensive grid interconnection coordination, and extensive regulatory approvals?
In the first half of 2026, the $15 billion allocated confirms the transition of a market segment from theoretical software applications to heavy industry. Historically, in the era of investment capital, the primary focus was on rapid user growth. In the current capital structure, capital will only be rewarded for actual physical deployment of a technology.
At the same time, the majority of late-stage funding will be allocated to those technologies designed to recover battery materials, produce baseline power through high-tech renewable energy systems, and make major strides towards direct industrial decarbonization.
The absence of publicly available pricing for many technologies across these sectors should not be viewed as an unacceptable lack of transparency; rather, it should be viewed as a reflection of the complexity of the project-based design of the technology. In the future, the actual commercial viability of a company will no longer be determined by its capital velocity or environmental urgency.
Rather, commercial viability will be a result of a company's ability to effectively navigate the logistics of its supply chain, properly integrate with the grid, and achieve favorable unit economics when compared to existing fossil fuel infrastructure.