Energy Startups

Rimba provides an AI-powered platform for operations, supply chain, and compliance teams in energy and industrial companies. The platform automates manual data entry, reporting, and compliance monitoring across fragmented enterprise systems.

1 investor

Rishabh Instruments designs, manufactures, and supplies electrical measurement, automation, and control devices along with precision die-casting components for power generation, utilities, automotive, solar, and industrial sectors across over 100 countries. The company also provides software platforms and specialized manufacturing services through facilities in India, Poland, and China.

1 investor

Stabil Drill designs and manufactures downhole drilling tools in-house, offering a rental fleet of more than 25,000 tools along with repair and technical support for oil and gas drilling operators. It serves offshore, land, and unconventional energy operations through locations worldwide, with affiliated partners Workstrings International and Quail Tools providing tubular rentals.

1 investor

RIVE is an investment firm focused on energy transition infrastructure, backing entrepreneurs across the energy value chain including renewables, sustainable thermal energy, green gas, energy storage, and charging infrastructure.

1 investor

RiverRidge is a waste management company based in Northern Ireland that provides waste treatment, recycling, and resource recovery solutions for businesses and communities, operating multiple treatment facilities with a focus on reducing landfill reliance.

1 investor

RIZM provides software that integrates data from production, energy procurement, and infrastructure and uses algorithms to optimize energy system design, procurement, control, and production decisions for industrial companies. It serves large manufacturers such as the BMW Group, which uses it to optimize the energy concepts of its plants worldwide.

1 investor

RMI works to unlock private capital and investment needed for the global energy transition by strengthening financial systems, enabling supportive policy, and creating demand for clean energy technologies and low-carbon materials. The organization conducts independent research and provides real-world solutions to accelerate decarbonization worldwide.

1 investor

Roadrunner Venture Studios is a venture studio that builds and invests in deep tech startups across energy, advanced manufacturing, quantum, and advanced materials. It partners with universities, national labs, and the private sector to develop ideas, and works alongside America's Frontier Fund with a focus on American technological competitiveness.

1 investor

Roam provides EV charging infrastructure across the UK, offering fully funded and client-funded charger installation and maintenance for businesses, along with a driver app for locating and paying for charging sessions. It serves both businesses installing chargers and EV drivers seeking charging locations.

1 investor

RKX Rock Extraction develops an electric rock breaker that uses controlled shock to fragment rock without explosives, serving mining and construction sectors. The company addresses the safety and environmental hazards of blasting and the inefficiency of hydraulic hammers.

1 investor

RocketHome provides building and energy intelligence software and IoT modules — including home energy management, EV charging, smart access, and smart building solutions — for companies in the real estate, energy, and infrastructure sectors. Its AI-based solutions support residents, tenants, owners, and property managers across the building lifecycle, covering PV, mobility, heating, decarbonization, and digital property management.

1 investor

Rockstart is an investment and accelerator platform that supports early-stage companies.

1 investor

Rocsole develops hybrid process flow management systems and software with sensor technology for safety-critical and pollution-challenged industries. The company focuses on cleantech solutions that improve operational safety, cleanliness, and efficiency across sectors including oil & gas and medtech.

1 investor

Rodatherm develops waterless geothermal energy systems for rapid electricity generation using proven drilling technology, targeting sedimentary basins in the US and beyond. The company applies oil and gas operational expertise to make geothermal projects faster, simpler, and economically scalable for grid decarbonization.

1 investor

Rondo Energy manufactures thermal batteries that store energy from renewable sources by heating refractory bricks to extreme temperatures, then discharge as industrial heat or power for manufacturing facilities. The company targets food & beverage, cement, fuel, chemical, and textile production with a cost-effective, zero-carbon alternative to lithium-ion storage.

1 investor

Roofit.Solar develops integrated metal solar roofs that combine roofing and photovoltaic electricity generation while preserving a conventional roof appearance. It offers full-service solar roof installations for homeowners and businesses, with a focus on residential and architecturally sensitive buildings, and has installed in over 30 countries.

1 investor

Rose Rock Bridge runs a six-month pilot deployment studio that sources, vets, and pilots proven energy technology startups (TRL 5+) alongside corporate partners in the oil, gas, and energy industry. The program offers accelerator sessions, pilot deployments with energy partners, and up to $100k in non-dilutive funding, with a presence in Tulsa.

1 investor

Roundtrip EV provides end-to-end electrification services for waste management fleets, including design, implementation, monitoring, and optimization of electric trucks and charging infrastructure for haulers and municipalities. The company offers a comprehensive service model with a fixed monthly fee that covers truck procurement, charger installation, software integration, maintenance, and fleet management.

1 investor

Rovial develops high-power systems for satellites, aiming to provide greater in-orbit power capacity at lower cost than current 25-30KW satellites. It targets GEO/MEO applications such as in-orbit data processing, secure data centers, in-orbit manufacturing, high-power radars, detection payloads, lasers, and lunar missions.

1 investor

Rovilus, based in Taiwan, develops battery products for clean energy and automotive applications. Its designs incorporate thermal management and fire-suppressant materials intended to extend battery life and improve safety, which the company positions as a way for operators to lower lifetime operating costs.

1 investor

RRC Companies is a multidisciplinary engineering firm providing comprehensive design and engineering services for renewable energy projects (solar, wind, energy storage) as well as traditional hydrocarbon energy infrastructure. The firm serves developers, owners, and engineering-procurement-construction firms across the United States, Canada, Latin America, and Southeast Asia.

1 investor

The Royal Society of Chemistry is a professional membership organisation that connects the global chemistry community through partnerships, conferences, networks and publications. It sets standards for chemical scientists, promotes open access to scientific knowledge, and advocates for chemistry's role in addressing societal challenges including healthcare, environmental protection, and clean energy.

1 investor

RS Resilient Structures manufactures advanced composite utility poles designed for electric grid infrastructure, serving utility companies globally. The poles are engineered for durability in extreme environments, helping utilities reduce outages and strengthen critical electrical systems.

1 investor

Ruhrpumpen manufactures heavy-duty horizontal centrifugal pumps built to industry standards for high-flow and high-pressure applications. The pumps serve oil & gas, power generation, and water & wastewater industries requiring reliable continuous-duty operation.

1 investor