TechCrunch names 22 top clean tech startups from Startup Battlefield

TechCrunch has narrowed down thousands of applicants to 200 top contenders for its annual Startup Battlefield, the publication’s annual pitch contest. Of these, 20 startups will compete on the main stage for the Startup Battlefield Cup and a $100,000 cash prize, while the remaining 180 startups will compete in their own pitch competition.

The selection highlights 22 clean tech and energy startups applying diverse technologies to industrial and environmental challenges. Among the featured companies, HKG Energy says its silicon material increases battery performance by 80% and costs up to 40% less than conventional materials. EnyGy Limited claims its ultracapacitors boost energy densities up to double the capacity of alternatives while remaining cost-effective. Meanwhile, HyWatts says its modular system provides zero-emission, off-grid electricity at lower costs than battery storage.

The full list of selected startups includes:

• AraBat: Recovers critical metals from spent lithium-ion batteries using a bio-based process.
• Aruna Revolution: Developed a compostable natural fiber menstrual pad from agricultural by-products.
• CarbonBridge: Builds bioreactors for microbial gas fermentation. The company says its technology is more efficient than other methods to synthesize molecules.
• Carbon Negative Solutions: Uses an AI-powered platform to turn industrial wastes and minerals into cement. The company says its cement can be used with standard equipment and is affordable.
• COI Energy: Runs a marketplace where enterprises can buy and sell excess energy capacity.
• Coral: Offers an AI-powered carbon accounting management platform.
• Emobi: Offers an AI-powered cloud platform for electric vehicle charging.
• EnyGy Limited: Developed ultracapacitors for energy storage. The company claims its technology boosts energy densities up to double the capacity of alternatives while remaining cost-effective.
• Ganiga Innovation: Offers an AI- and robotics-powered garbage bin that recognizes and sorts recyclables.
• Gemini Energy: Developed fuel cell technology. The company says its technology can generate power on-site without combustion.
• Helix Earth: Created liquid-gas chemistry products. The company says its processes are more energy-efficient and affordable than alternatives.
• HKG Energy: Developed a silicon material for lithium-ion batteries. The company says its material increases battery performance by 80% and costs up to 40% less than conventional materials.
• HomeBoost: Offers a do-it-yourself energy assessment system for homeowners.
• HyWatts: Supplies modular systems that generate energy on-site. The company says its system provides zero-emission, off-grid electricity at lower costs than battery storage.
• Kaio Labs: Develops CO2 conversion technologies to transform waste carbon dioxide into chemicals.
• MacroCycle Technologies: Developed a polyester textiles recycling technology.
• Namu Robotics Corporation: Provides tree-planting robots for re-forestry projects.
• Naware: Offers an AI-powered robotic weed killer that attaches to lawn-mowing equipment.
• Segura: Offers a method to test water quality that delivers nearly instant results.
• ShellVive: Filters water by repurposing oyster shells.
• Whisper Energy: Developing an AI-native sensor to improve energy efficiency in commercial buildings.
• Xatoms: Created a light-activated chemical to remove pollutants from water.

Why it matters

This list provides a snapshot of emerging clean tech and energy innovation, showcasing how startups are applying AI, robotics, and new materials to solve industrial and environmental challenges.