Portfolio map · Accelerator · United States

Cleantech Open portfolio map

82 startups Cleantech Open has backed in rounds we track, since 2016, grouped by their main sector. Together they have raised $353M. The biggest sector is Cleantech, with 20 companies.

82startups backed
10sectors
$353Mraised between them
Cleantechbiggest sector

Cleantech Open's investor profile

Cleantech

20

Energy

18

Agtech

9

Automotive & EVs

7

Biotech

6

Chemicals & Materials

5

Manufacturing

5

AI

4

IT Services

4

Hardware & Electronics

4

Segment by segment

Cleantech

20 startups · $150M raised

  1. ElectrIQ PowerElectriq Power is a provider of smart home battery storage solution for homes and small businesses.United States$51M
  2. OxEon EnergyOxEon Energy is a cleantech start-up that works on alternative energy storage, synthetic fuels, and high purity gas production.United States$36M
  3. Barrio EléctricoBarrio Eléctrico offers residential solar-plus-storage leases, relying on community engagement to support the systems.Puerto Rico$21M
  4. Ivy EnergyIvy Energy is a Cleantech brand and multifamily solar billing software platform based in San Diego, California.United States$18M
  5. VoltpostVoltpost transforms lampposts into smart electric vehicle charging stations to make them accessible to people.United States$4.9M
  6. Littoral Power SystemsLittoral Power Systems designs, manufactures, and installs distributed power systems.United States$4.0M
  7. EcospearsecoSPEARS is a cleantech and environmental technology company founded in 2017, focused on developing sustainable solutions to permUnited States$4.0M
  8. RenewWestRenewWest is an environmental services company founded in 2015, focusing on nature-based climate solutions.United States$3.2M

Energy

18 startups · $55M raised

  1. Proof EnergyWe are revolutionizing power generation using readily available renewable fuels.United States$12M
  2. EnzincEnzinc is an advanced battery developer that offers rechargeable zinc-air batteries.United States$8.3M
  3. Sinergy FlowSinergy Flow is a Milan-based DeepTech startup founded in 2022, specializing in low-cost, sustainable redox flow batteries (RFBs) Italy$8.3M
  4. SourcewaterSourcewater offers the largest online water source, reuse, and disposal database in the upstream energy industry.United States$7.2M
  5. RePurpose EnergyRePurpose Energy reuses electric vehicle batteries to create lower-cost, more sustainable "second life" solar energy storage systems.United States$6.3M
  6. ThiozenThiozen develops novel hydrogen gas production technology designed to reduce greenhouse gases.United States$3.2M
  7. Switched SourceSwitched Source is a manufacturing company that develops medium-voltage devices to enhance utility operations through automation.United States$2.6M
  8. Orus EnergyOrus Energy leverages the power of AI to unlock potential of electrical flexibility in commercial buildings.France$2.4M

Agtech

9 startups · $25M raised

  1. WaterBitWaterBit’s automated irrigation solution empowers growers to remotely monitor and control precision irrigation to their crops.United States$11M
  2. ATAker TechnologiesAker is an agriculture data company providing crop intelligence and in-season analytics.United States$5.0M
  3. Clean Valley Bio-filtration TechnologiesClean Valley CIC is a group of entrepreneurs, engineers and environmental scientists with a nature-inspired ideas for Canadian Innovation.Canada$4.0M
  4. Renegade PlasticsRenegade Plastics offers an alternative to PVC-coated fabrics for a circular plastics economy in industry and agriculture.United States$2.0M
  5. BlueTraceBlueTrace is a seafood sales and operations platform that enhances the seafood supply chain by digitizing transactions and ensurinUnited States$1.3M
  6. Nutrient Recovery & UpcyclingAt NRU, llc we imagine, research, and develop technologies that recover and upcycle low-grade resources into high value products.United States$900K
  7. SimuSolarSimusolar increases rural prosperity by selling and financing productive equipment to farmers and small businesses.United States$250K
  8. Ecotone RenewablesEcotone Renewables is a Pittsburgh-based public benefit corporation founded in 2019 by engineering students.United States$208K

Automotive & EVs

7 startups · $61M raised

  1. Atlis Motor VehiclesAtlis Motor Vehicles is a mobility technology company that designs and develops battery electric trucks and charging stations.United States$30M
  2. EV LifeEV Life is a financial technology company based in Folsom, California, founded in 2019.United States$15M
  3. OpConnectOpConnect specializes in EV charging solutions, dedicated to reducing greenhouse gas emissions through transportation electrification.United States$5.3M
  4. ActasysActasys is a development-stage company based in Brooklyn, NY, specializing in advanced hardware and software solutions for sensor United States$5.0M
  5. Moon Five TechnologiesMoon Five Technologies is a clean energy startup that develops renter-first EV charging solutions for multifamily buildings.United States$3.7M
  6. HyperBoreanEnergy consumption for air conditioning is forecast to surge 3300% by 2100 as developing world incomes rise and urbanization advances.United States$2.1M
  7. Clean Earth RoversWe collect trash and water quality data from coastal waters using autonomous drones.United States$100K

Biotech

6 startups · $13M raised

  1. Pyran Inc.Pyran sells renewable chemicals to make environmentally-friendly paint, coatings, adhesives, polyurethanes, degradable films, and plastics.United States$5.4M
  2. PolycarbinPolycarbin is an environmental services company focused on creating a circular economy for single-use scientific plastics in the bUnited States$4.2M
  3. Fluid-ScreenFluid-Screen is a biotechnology and nanotechnology company founded in 2015 and based in Beverly, Massachusetts.United States$1.3M
  4. VBVariFAS BiorenewablesVariFAS Biorenewables produces bio-based chemicals for the chemical industry.-$809K
  5. CarbonBridgeCarbonBridge converts methane to methanol using microbes in a proprietary bioreactor.United States$720K
  6. AquaRealTimeAquaRealTime is an environmental technology company based in Boulder, Colorado, founded in 2018.United States$175K

Chemicals & Materials

5 startups · $12M raised

  1. Leeta MaterialsLeeta Materials is a materials manufacturing company.United States$5.8M
  2. Skycool SystemsSkyCool Systems is a cleantech company based in Mountain View, California, founded in 2016.United States$5.0M
  3. Radical PlasticsRadical Plastics is a radical solution to plastic pollution.United States$1.0M
  4. General Engineering and ResearchGeneral Engineering and Research provides nanoparticle products for polishing the chemical mechanical planarization application.United States$256K
  5. AmatecUsing High-Density Gypsum to construct more eco-friendly, cheaper, faster built, and stronger housesUnited States$240K

Manufacturing

5 startups · $8.4M raised

  1. Verde TechnologiesVerde Technologies specializes in the production of perovskite solar cells that offers thin film and flexible solar panels.United States$3.0M
  2. Arculus SolutionsArculus Solutions is a cleantech company dedicated to enhancing hydrogen transportation through the retrofitting of natural gas inUnited States$2.0M
  3. TessolarTessolar has design innovation to improve solar photovoltaic system performance and reduce installed system costs.-$1.3M
  4. Sinovia TechnologiesSinovia Technologies manufactures flexible printed OLED displays.United States$1.2M
  5. NHNano HydrophobicsNano Hydrophobics offers industrial coatings services.-$910K

AI

4 startups · $18M raised

  1. SSwitchUnited States$16M
  2. MSBAIMSBAI (Techstars '20) develops GURU, a cognitive AI assistant that enables untrained users to run specialized simulation software.United States$822K
  3. TerrafuseTerrafuse builds AI technology to deliver actionable climate intelligence on the planet.-$750K
  4. MMAXWELLIANMaxwellian revolutionizes health with chemical-free clinical-grade air and hygiene for commercial buildings and mobilityUnited States$250K

IT Services

4 startups · $5.9M raised

  1. Apis InnovationApis Innovation is a technology company based in Easton, Pennsylvania, focused on landfill gas management and methane capture.United States$4.5M
  2. Parthian EnergyAdvanced battery systems for the 21st centuryUnited States$1.1M
  3. TeqnizanTeqnizan is a startup based in Minnesota, USA, focused on creating innovative consumer products that merge technology with jewelry.United States$250K
  4. Medley ThermalMedley Thermal develops software for switching management between the energy sources optimally without disruption to the supply of steam.-$15K

Hardware & Electronics

4 startups · $3.4M raised

  1. Arc Suppression TechnologiesWe created, patented, and are marketing a compelling, disruptive, and previously thought impossible solution to the problem of eleUnited States$1.9M
  2. Sensible PhotonicsSensible Photonics is partnering with utilities, OEMs and regulators to improve grid reliability and resilience through low-cost sUnited States$600K
  3. AndlucaAndluca designs and develops advanced materials and systems for applications in fenestration and other applications.United States$500K
  4. GeoOrbitalGeoOrbital is a U.S.-based company headquartered in Cambridge, Massachusetts, that specializes in electric wheel systems.United States$395K

How this map is made. Every startup here has raised money in a round we track that names Cleantech Open as an investor, the first in 2016. Each sits under its main sector, read from its rounds, and each sector shows its best-funded first; sectors with fewer than three companies are left off. Rebuilt nightly; updated 15 November 2026.

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