Top 10 US Climate Technology Companies

Bloom Energy generates $1.3B in revenue from its solid oxide fuel cell systems that convert natural gas, hydrogen, or biogas into electricity at over 65% efficiency with near-zero air pollutants. Its ES-5 servers deployed at data centers for Apple, Google, and AT&T deliver reliable on-site baseload power without grid dependency. In 2025, Bloom launched a hydrogen electrolyzer product line targeting green hydrogen production for industrial decarbonization at $2 per kilogram by 2030.

Form Energy leads the long-duration energy storage market with its iron-air battery technology, which stores energy for 100+ hours at $20/kWh — ten times cheaper than lithium-ion for multi-day storage. Its first utility-scale deployment with Georgia Power went live in 2025, providing 3 days of backup storage for a 15MW system. Form Energy's batteries use iron, water, and air — abundant, non-toxic materials — solving the long-duration storage problem that has limited renewable energy to weather-dependent generation, and having raised $800M+ in funding.

Enphase Energy dominates residential solar optimization, having shipped 68M+ microinverters where each one independently optimizes solar output from a single panel. Enphase posted $1.4B in 2024 revenue with its 2025 expansion into Europe generating 30%+ of revenue from international markets. The IQ Battery 5P achieved the highest power output of any residential AC-coupled battery, solidifying Enphase's edge in energy independence.

Its Adaptive Home platform integrates solar, battery, EV charging, and smart thermostats into a unified energy subscription, generating $649M in 2024 revenue. In 2025, Sunnova launched its Solar Microgrid-as-a-Service for rural communities and island markets, providing clean energy independence to areas with unreliable grid infrastructure, an approach that is cheaper than Enphase's microgrid solution for off-grid setups.

Orsted invested $4B+ in US offshore wind development, completing the South Fork Wind project in 2024 — the first commercial-scale US offshore wind farm — powering 70,000 Long Island homes. Orsted's US division employs 1,500+ people across four state partnerships (New York, Connecticut, Rhode Island, New Jersey) targeting 9GW of total US capacity by 2030, making it the largest offshore wind developer in the US by committed capacity.

Carbon Clean leads the modular carbon capture sector with its CycloneCC technology, which slashes equipment size by 10x versus conventional systems and cuts capital costs to $30–50M per 100,000-ton annual capture. This innovation allows deployment across cement, steel, and chemical plants, where the company has already completed 300+ installations. The $150M raised underscores investor confidence in its scalable, space-efficient approach.

Turntide Technologies delivers unmatched energy savings in commercial and industrial applications, with its Smart Motor System cutting HVAC, fan, and pump energy use by 64–70% — a reduction 10% higher than the average industrial motor upgrade. Its switched reluctance architecture eliminates rare earth magnets while achieving variable-speed efficiency that traditional AC motors cannot match, offering a 30% lighter design than the runner-up in building efficiency solutions. In 2025, Turntide partnered with Tesco and Whole Foods to deploy 10,000+ smart motors in refrigeration and HVAC systems across UK and US stores, backed by $400M raised at a $2B valuation.