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Every year, TechCrunch\u2019s Startup Battlefield pitch contest draws thousands of applicants. We whittle those applications down to the top 200 contenders<\/a>, and of them, the top 20 compete on the big stage to become the winner, taking home the Startup Battlefield Cup and a cash prize of $100,000. But the remaining 180 startups all blew us away as well in their respective categories and compete in their own pitch competition.<\/p>\n Here is the full list of the clean tech and energy Startup Battlefield 200 selectees, along with a note on why they landed in the competition.\u00a0<\/p>\n What it does:<\/strong> AraBat has developed a recycling technology that recovers critical metals like\u00a0nickel, cobalt, and others from spent lithium\u2011ion batteries.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> The company\u2019s process is bio-based, using plant waste like citrus peels rather than toxic chemicals.\u00a0\u00a0<\/p>\n What it does<\/strong>: Aruna Revolution has developed a compostable natural fiber menstrual pad from agricultural by-products.\u00a0<\/p>\n Why it\u2019s noteworthy: <\/strong>Aruna has redesigned the menstrual pad into a product that works well yet still decomposes quickly and avoids plastic and harmful chemicals.\u00a0<\/p>\n What it does:<\/strong> CarbonBridge builds bioreactors for microbial gas fermentation that transforms waste gases like methane and CO\u2082 into valuable molecules.\u00a0<\/p>\n Techcrunch event<\/p>\n \n\t\t\t\t\t\t\t\t\tSan Francisco<\/span> Why it\u2019s noteworthy:<\/strong> CarbonBridge says its technology is more efficient than other methods to synthesize molecules.\u00a0<\/p>\n What it does:<\/strong> Carbon Negative uses an AI-powered platform to turn industrial wastes and minerals into cement.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> The company says its cement can be used with standard equipment, making it affordable, yet its process transforms this major building material to become carbon negative.\u00a0<\/p>\n What it does:<\/strong> COI Energy runs a marketplace where enterprises can buy and sell excess energy<\/a> capacity, as well as get better, predictive insights into their energy needs.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> By letting enterprise campuses share their reserved energy allotments with each other, the company instantly optimizes grid usage.\u00a0<\/p>\n What it does<\/strong>: Coral offers an AI-powered carbon accounting management platform.\u00a0<\/p>\n Why it\u2019s noteworthy: <\/strong>It automates data collection and reporting of the energy footprint and uses the blockchain to trace, and stay accountable for, carbon credits.\u00a0\u00a0<\/p>\n What it does:<\/strong> Emobi offers an AI-powered cloud platform for universal electric vehicle charging.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> The company\u2019s service supports secure automatic charging for EV charging networks, even on legacy hardware.\u00a0<\/p>\n What it does<\/strong>: EnyGy has invented a line of higher performance ultracapacitors, an energy storage device that rests somewhere between a conventional capacitor and a battery.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> The company makes its ultracapacitors by melding activated carbon electrodes with a state-of-the-art electrolyte and claims this boosts energy densities up to double the capacity of alternatives, while remaining cost-effective.\u00a0<\/p>\n What it does:<\/strong> Ganiga offers an AI- and robotics-powered garbage bin called Hoooly that recognizes and sorts recyclables.<\/p>\n Why it\u2019s noteworthy<\/strong>: Ganiga is selling Hoooly to enterprise campuses and industrial sites like airports to boost recycling rates, offering analytics that assist with ESG reporting.\u00a0<\/p>\n What it does:<\/strong> Gemini has developed a fuel cell technology that can generate power on-site, converting gas into electricity without combustion, it says.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> The company is marketing its clean tech power generator at data centers and says its systems can be deployed in months versus the years needed to upgrade a conventional power grid.\u00a0<\/p>\n What it does:<\/strong> Helix Earth has created products for earth from liquid-gas chemistry designed for spacecraft, including ultra-efficient HVAC and carbon capture systems.\u00a0<\/p>\n Why it\u2019s noteworthy: <\/strong>The company says its processes are far more energy-efficient while being more affordable and can be retrofitted to commercial rooftops.\u00a0\u00a0<\/p>\n What it does:<\/strong> HKG energy has created a next-generation silicon material for lithium-ion batteries.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong>\u00a0HKG says its tech increases battery performances by 80% yet costs up to 40% less than those using conventional materials.\u00a0<\/p>\n What it does:<\/strong> HomeBoost offers a do-it-yourself energy assessment system that helps homeowners identify leaky windows and find rebate opportunities and other ways to cut their energy bills.<\/p>\n Why it\u2019s noteworthy<\/strong>: It ships to homeowners custom hardware that, coupled with a smartphone app, scans the home and then home energy experts review and produce the report.\u00a0<\/p>\n What it does: <\/strong>HyWatts supplies modular systems that generate energy on-site for industrial uses.<\/p>\n Why it\u2019s noteworthy:<\/strong> It calls its system Power-Plant-in-a-Box, which integrates hydrogen storage and reversible fuel cells for, it says, zero-emission, off-grid electricity at far lower costs than battery storage.<\/p>\n What it does<\/strong>: Kaio Labs develops CO2<\/sub> conversion technologies to transform waste carbon dioxide into valuable chemicals like carbon monoxide, formic acid, and ethylene.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> Kaio uses an AI-powered workflow to automate discovery, with the goal being to extract these chemicals in a cost-competitive way.\u00a0<\/p>\n What it does:<\/strong> MacroCycle has invented a patented polyester textiles recycling technology.<\/p>\n Why it\u2019s noteworthy:<\/strong> The company promises to make recycled plastic as inexpensive<\/a> as virgin material through tech that separates the desirable synthetic fibers from waste textiles.\u00a0<\/p>\n What it does:<\/strong> Namu Robotics provides tree-planting robots geared toward re-forestry projects.<\/p>\n Why it\u2019s noteworthy:<\/strong> The world doesn\u2019t have the resources to replant trees fast enough between the labor involved and the terrain, so Namu\u2019s tech promises to automate the process.\u00a0<\/p>\n What it does:<\/strong> Naware offers an AI-powered robotic weed killer that attaches to lawn-mowing equipment to kill weeds as the lawn is mowed.<\/p>\n Why it\u2019s noteworthy:<\/strong> Not only does it auto-detect weeds, but it also uses hot steam to kill them, rather than toxic herbicides.\u00a0\u00a0<\/p>\n What it does:<\/strong> Segura offers a proprietary method to test water quality that delivers nearly instant results without the need to hire testing experts.<\/p>\n Why it\u2019s noteworthy:<\/strong> Segura has invented a test strip that is reminiscent of those used for diabetes monitoring and is as easy to use.\u00a0<\/p>\n What it does:<\/strong> ShellVive has created a method to filter water by repurposing oyster shells.\u00a0<\/p>\n Why it\u2019s noteworthy:<\/strong> ShellVive solutions take an abundant agricultural waste product, discarded oyster shells, and turns them into an affordable, eco-friendly water filtration material.\u00a0<\/p>\n What it does:<\/strong> Whisper Energy is developing an AI-native sensor to improve energy efficiency in commercial buildings.<\/p>\n Why it\u2019s noteworthy:<\/strong> The company is targeting small to midsized buildings with its easy-to-install sensors and system as an affordable alternative to large-scale energy automation solutions.<\/p>\n What it does:<\/strong> Xatoms has created a photocatalyst \u2014 a light-activated chemical \u2014 that can remove bacteria, viruses, chemicals, and heavy metals from polluted water.\u00a0<\/p>\nAraBat<\/a>\u00a0<\/h5>\n
Aruna Revolution<\/a>\u00a0<\/h5>\n
CarbonBridge<\/a>\u00a0<\/h5>\n
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tOctober 13-15, 2026<\/span>\n\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\nCarbon Negative Solutions<\/a>\u00a0<\/h5>\n
COI Energy<\/a>\u00a0<\/h5>\n
Coral<\/a>\u00a0<\/h5>\n
Emobi<\/a>\u00a0<\/h5>\n
EnyGy<\/a> Limited<\/a>\u00a0<\/h5>\n
Ganiga Innovation<\/a>\u00a0<\/h5>\n
Gemini Energy<\/a>\u00a0<\/h5>\n
Helix Earth<\/a>\u00a0<\/h5>\n
HKG Energy<\/a>\u00a0<\/h5>\n
HomeBoost<\/a>\u00a0<\/h5>\n
HyWatts<\/a><\/h5>\n
Kaio Labs<\/a>\u00a0<\/h5>\n
MacroCycle Technologies<\/a>\u00a0<\/h5>\n
Namu Robotics Corporation<\/a>\u00a0<\/h5>\n
Naware<\/a>\u00a0<\/h5>\n
Segura<\/a>\u00a0<\/h5>\n
ShellVive<\/a>\u00a0<\/h5>\n
Whisper Energy<\/a>\u00a0<\/h5>\n
Xatoms<\/a>\u00a0<\/h5>\n