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Cleantech Open Portfolio Companies

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

Last updated: June 2026

Cleantech Open Investment Overview

Portfolio Companies
147
Total Invested
$435.1M
Average Investment
$4.4M

Cleantech Open's Most Recent Investments (2020+)

Company NameFoundedFunding StageAmountCity
Polycarbin2023Seed$4.2MEl Sobrante
Apis Innovation2023Venture - Series Unknown$4.5MEaston
Optimus Technologies2023Series A$17.8MPittsburgh
Verde Technologies2026Venture - Series Unknown$3.0MBurlington
Clean Valley Bio-filtration Technologies2026Debt Financing$4.0MDartmouth
Sinergy Flow2026Seed$8.3MMilano
BlueTrace2026Seed$1.3MCastine
Kara Water2025Equity Crowdfunding$712KNew York
Switched Source2025Seed$2.6MChicago
MicroEra Power2025Grant$250KRochester

Complete List of Cleantech Open Portfolio Companies (147)

Export
#CompanyStageAmountLocation
26PolycarbinSeed$4.2MEl Sobrante, United States
27Apis InnovationVenture - Series Unknown$4.5MEaston, United States
28Optimus TechnologiesSeries A$17.8MPittsburgh, United States
29Verde TechnologiesVenture - Series Unknown$3.0MBurlington, United States
30Clean Valley Bio-filtration TechnologiesDebt Financing$4.0MDartmouth, Canada
31Sinergy FlowSeed$8.3MMilano, Italy
32BlueTraceSeed$1.3MCastine, United States
33Kara WaterEquity Crowdfunding$712KNew York, United States
34Switched SourceSeed$2.6MChicago, United States
35MicroEra PowerGrant$250KRochester, United States
BiotechnologyLogisticsSupply Chain ManagementWaste Management

Polycarbin is a sustainable lab products from in-house recycled plastics, reducing carbon emissions in the scientific supply chain.

El Sobrante, United States
July 2023
$4.2M
Seed

Founder Contacts

19,000+ verified contacts

ComputerEnergyRenewable Energy

Apis Innovation develops IoT technology that enables landfills to harvest more renewable energy from decomposing waste.

Easton, United States
June 2023
$4.5M
Venture - Series Unknown

Founder Contacts

19,000+ verified contacts

ManufacturingRenewable EnergyTransportationWaste Management

Optimus Technologies is the market leader in EPA compliant biodiesel conversion systems for medium- and heavy-duty trucks.

Pittsburgh, United States
April 2023
$17.8M
Series A

Founder Contacts

19,000+ verified contacts

ManufacturingRenewable EnergySolar

Verde Technologies specializes in the production of perovskite solar cells that offers thin film and flexible solar panels.

Burlington, United States
January 2026
$3.0M
Venture - Series Unknown

Founder Contacts

19,000+ verified contacts

AgTechAquacultureRenewable Energy

Clean Valley CIC is a group of entrepreneurs, engineers and environmental scientists with a nature-inspired ideas for Canadian Innovation.

Dartmouth, Canada
March 2026
$4.0M
Debt Financing

Founder Contacts

19,000+ verified contacts

BatteryEnergyEnergy EfficiencyEnergy Storage

Sinergy Flow enables the energy transition by developing redox flow batteries for energy storage.

Milano, Italy
February 2026
$8.3M
Seed

Founder Contacts

19,000+ verified contacts

AgTechAquacultureComputerFood and BeverageSeafood

BlueTrace offers a traceability solution for shellfish growers, wholesalers, distributors, and dealers.

Castine, United States
February 2026
$1.3M
Seed

Founder Contacts

19,000+ verified contacts

Kara Water manufactures air-to-water devices and self-refilling coffee machines that extract water from air and add minerals.

New York, United States
November 2025
$712K
Equity Crowdfunding

Founder Contacts

19,000+ verified contacts

Electrical DistributionElectronicsEnergy Management

Switched Source is a manufacturing company that develops medium-voltage devices to enhance utility operations through automation.

Chicago, United States
November 2025
$2.6M
Seed

Founder Contacts

19,000+ verified contacts

CleanTechData CenterEnergyEnergy EfficiencyEnergy ManagementEnergy StorageFuel CellHeatingVentilationand Air Conditioning (HVAC)Property DevelopmentProperty Management

Resilient, efficient Thermal Energy Storage for C&I buildings

Rochester, United States
September 2025
$250K
Grant

Founder Contacts

19,000+ verified contacts

BatteryElectric VehicleManufacturing

Enzinc is an advanced battery developer that offers rechargeable zinc-air batteries.

Richmond, United States
August 2025
Non Equity Assistance

Founder Contacts

19,000+ verified contacts

ChemicalRenewable Energy

RenewCO2 is a research company that develops processes for converting CO2 into chemicals and fuels.

Cranford, United States
August 2025
$2.0M
Seed

Founder Contacts

19,000+ verified contacts

ManufacturingSustainabilityWaste Management

ByFusion Global is a waste to infrastructure company that provides solutions to address the global plastic crisis.

Gardena, United States
June 2025
Non Equity Assistance

Founder Contacts

19,000+ verified contacts

Plastics and Rubber ManufacturingPollution Control

Radical Plastics is a radical solution to plastic pollution.

Beverly, United States
May 2025
$1.0M
Series Unknown

Founder Contacts

19,000+ verified contacts

Energy EfficiencyRenewable Energy

REplace is a tool for constructing renewable energy projects that makes determining the site of a solar or wind greenfield project simple.

Tel Aviv, Israel
May 2025
$2.1M
Seed

Founder Contacts

19,000+ verified contacts

Advanced MaterialsManufacturing

Leeta Materials is a materials manufacturing company.

Goleta, United States
May 2025
$5.6M
Seed

Founder Contacts

19,000+ verified contacts

Air TransportationElectric VehicleHardware

Kite Magnetics is an electric aviation motor manufacturing company.

Notting Hill, Australia
May 2025
$2.3M
Seed

Founder Contacts

19,000+ verified contacts

Health CareMedicalMedical Device

Gencores provides a platform that reduces the risk of concussion with customizable, smart, shock-absorbing helmet inserts.

Boston, United States
May 2025
$100K
Grant

Founder Contacts

19,000+ verified contacts

Electric VehicleEnergy Efficiency

Moon Five Technologies is a clean energy startup that develops renter-first EV charging solutions for multifamily buildings.

Berkeley, United States
April 2025
$3.4M
Grant

Founder Contacts

19,000+ verified contacts

EnergyEnergy EfficiencySoftware

Emulate provides SaaS for utilities to offer behind-the-meter services and optimize demand flexibility with virtual battery technology.

Lund, Sweden
April 2025
$5.5M
Series A

Founder Contacts

19,000+ verified contacts

AgricultureBiotechnologySustainability

Capro-X is an ag-tech company that improves the sustainability in the dairy industry.

Ithaca, United States
March 2025
Seed

Founder Contacts

19,000+ verified contacts

AerospaceArtificial Intelligence (AI)EnergyWind Energy

The most effective satellite-derived metocean data for offshore and maritime applications

Torino, Italy
February 2025
$1.5M
Seed

Founder Contacts

19,000+ verified contacts

AgricultureConsumerEnergyFinancial ServicesSolar

Simusolar increases rural prosperity by selling and financing productive equipment to farmers and small businesses.

San Francisco, United States
February 2025
Non Equity Assistance

Founder Contacts

19,000+ verified contacts

MiningMining TechnologySensor

Muon Vision specializes in nuclear imaging sensors, IoT, slope stability, and data mining services.

Cambridge, United States
January 2025
$2.5M
Seed

Founder Contacts

19,000+ verified contacts

AgTechIndustrial ManufacturingPlastics and Rubber ManufacturingSustainability

Renegade Plastics offers an alternative to PVC-coated fabrics for a circular plastics economy in industry and agriculture.

Golden, United States
December 2024
$2.0M
Seed

Founder Contacts

19,000+ verified contacts

Showing 26-50 of 147 portfolio companies

Frequently Asked Questions About Cleantech Open

How many companies has Cleantech Open invested in?

Cleantech Open has invested in 147 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Cleantech Open invest in?

Cleantech Open's top investment sectors include Energy, Renewable Energy, Manufacturing, Energy Efficiency, Waste Management. The firm invests across 50 different industry categories.

What is Cleantech Open's largest investment?

Among tracked funding rounds, Optimus Technologies received $17.8M in a Series A round. Cleantech Open's total known invested capital is $435.1M.

What is the average investment size for Cleantech Open?

Cleantech Open's average investment size is $4.4M across its portfolio of 147 companies.

What are Cleantech Open's most recent investments?

Recent Cleantech Open portfolio additions include Polycarbin, Apis Innovation, Optimus Technologies, Verde Technologies, Clean Valley Bio-filtration Technologies. These companies were founded in 2020 or later.

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