Climate Tech Startups

OceanScore provides maritime emissions and compliance software that helps shipping companies, financial institutions, and ports manage regulatory obligations and measure environmental performance under schemes like EU ETS and FuelEU Maritime.

2 investors

OCOchem develops an electrochemical process that converts CO2 into formic acid (hydrogen formate) using only electricity and water, aiming to undercut the cost of the fossil-fuel-based version. The company targets the renewable chemicals and industrial decarbonization market.

2 investors

Octavia Carbon designs modular Direct Air Capture (DAC) systems that remove CO2 from the atmosphere and store it permanently in basaltic rock formations, offering carbon removal and offsetting services. Based in Kenya, it integrates its technology with the country's geothermal energy resources and partners with Cella for geological storage.

2 investors

OlsAro is an AgTech company developing climate-resilient cereal seed varieties, addressing traits like salinity, heat and drought tolerance and nitrogen efficiency. Its biotech platform SeedAX integrates into seed companies' processes to speed up trait discovery and variety development for crops such as wheat, maize, rice, barley, oat and rye.

2 investors

Olympian Motors designs and manufactures electric vehicles with minimalist aesthetics and sustainable materials, targeting entrepreneurs and creative professionals. The company integrates modular vehicle architecture with AI-powered operating systems to deliver an experience-focused alternative to conventional EVs.

2 investors

Olyns operates an AI-powered reverse vending machine called the Cube that incentivizes plastic recycling in retail locations by rewarding users with cash and perks, while funding the system through on-screen advertising revenue. The company combines recycling infrastructure with digital media to address plastic waste pollution and create a sustainable, self-funded circular economy model.

2 investors

This page is an investment portfolio listing from Omnes Capital showing 100+ portfolio companies across multiple sectors including deeptech, renewables, biotech, healthtech, materials, and real estate. It is not a company website but a VC/PE firm's investment page.

2 investors

Ontra builds software for public transit agencies to plan networks, manage operations, and provide rider-facing tools on a single platform. The company serves transit authorities seeking to improve service reliability and efficiency within budget constraints.

2 investors

Ignite provides solar energy solutions across African markets, from access to productivity, designed for rapid deployment and scaling. The company bridges capital and innovation to accelerate energy access and climate impact.

2 investors

Openvolt provides API infrastructure that unlocks smart-meter data to enable developers to build energy management applications for electrification and decarbonization. The company serves software developers building applications for electric vehicles, renewable energy, heat pumps, and other electrified assets.

2 investors

Orbio Earth provides satellite-based methane emission data to financial investors and institutions, replacing traditional estimation methods used in the oil and gas sector. The company uses satellite imagery to monitor methane releases from oil and gas facilities globally, enabling investment firms to assess regulatory compliance risks and identify higher-performing operators.

2 investors

Organicin Scientific develops the CinThesis platform for applications in animal health and aquaculture sectors. The company focuses on translating its technology into products for these life science-related markets.

2 investors

Origis Energy is a renewable energy and decarbonization platform that develops and operates utility-scale solar and battery energy storage plants supplying grid power across the United States. It works with utilities such as TVA to deliver projects combining solar generation and battery storage.

2 investors

Otark operates a digital platform for procuring and selling certified green electricity in Germany, connecting industrial and mid-sized buyers directly with producers through a PPA marketplace, standardized 1-Click PPAs, and a planned Green SPOT day-ahead exchange. It handles contract execution including physical delivery, balancing group coordination, guarantee-of-origin transfers, and settlement data for its 350+ business customers.

2 investors

Our Leg Up operates an investment platform and opportunity marketplace built by finance professionals with a mission to reduce wealth inequality. The company serves investors and individuals seeking to participate in investment opportunities.

2 investors

Outway is a platform for land managers that combines mapping, tracking, recording, and reporting in one place, letting teams log work and communicate in the field, office, or offline. It replaces spreadsheets and paper notes for land management and conservation work, and was developed working with land managers at Stagecoach State Park in Colorado.

2 investors

OXCCU develops a patented one-step Fischer-Tropsch catalyst and reactor that converts waste carbon sources—CO2, CO, hydrogen, biomethane, and gasified biomass—into sustainable aviation fuel (SAF), petrochemicals, and biodegradable plastics. Spun out of the University of Oxford, it operates the OX1 demonstration plant at Oxford Airport and offers engineering packages for scaling low-cost, low-emission fuel production.

2 investors

Ozo Innovations develops eloclear, a cleaning and disinfection technology that converts salt and cold water into a hygiene solution for food manufacturers and other sectors. The product aims to reduce water, energy, and chemical use while supporting productivity and sustainability/net-zero goals in food processing.

2 investors

Pacifico produces mycelium-based "Mycomeat" sold under the Viando brand, offering poultry alternatives (with pork and fish planned) grown in steel fermentation bioreactors. It supplies clean-label meat alternatives to B2B food manufacturers and food service chains that integrate into existing meat supply chains and recipes.

2 investors

Paradigm designs and manufactures pollution control devices for diesel and gasoline engines that reduce emissions and particulate matter while lowering maintenance costs and fuel consumption. The company serves the transportation, construction, mining, agriculture, marine and industrial sectors using diesel and gas engines.

2 investors

Pathzero offers a climate intelligence platform that helps financial institutions and companies manage carbon emissions data from ingestion to disclosure, including a private markets disclosure network connecting asset owners with fund managers. It integrates its private markets data with public markets data from providers like MSCI and S&P Global to support climate risk management.

2 investors

Pelt8 was a platform for sustainability teams to collect, validate, and report environmental, social, and governance (ESG) data against international standards including GRI, SASB, TCFD, ESRS, CSRD, and Swiss CO regulations. The company served Swiss companies seeking to move from spreadsheet-based processes to structured, auditable ESG reporting.

2 investors

Perfekto is a direct-to-consumer platform that delivers "imperfect" fresh produce—fruits and vegetables rejected for cosmetic or production reasons—directly from farms to customers' homes in Mexico. The service reduces food waste while offering consumers cheaper prices and fresher products while supporting farmers.

2 investors

Soilytics develops soil analysis technology and a web-based soil prescription platform, including a proprietary soil sampling device (SoilSpec) that converts hyperspectral reflectance data into soil fertility maps. It serves farmers, agronomists, and land managers in the agricultural industry to support nutrient management and soil health decisions.

2 investors