Energy Startups

E-Tech Heat Recovery Systems designs and manufactures custom, engineered-to-order economizers, condensing economizers, waste-heat boilers, heaters, and heat-exchanger components that let industrial, institutional, and utility customers capture and reuse waste heat. Founded in 1976, the company operates from Tulsa, Oklahoma.

1 investor

Firma develops software and optimization systems for clean energy portfolio management, serving utilities, grid operators, and large-load customers seeking reliable firm power capacity. The company combines infrastructure expertise with AI-driven decision systems to accelerate deployment of clean energy and manage grid interconnections.

1 investor

FIS Chemicals supplies over 1,000 specialty chemicals and cleaning products for industrial, marine, oil and gas, automotive, and hospitality sectors. The company offers solutions including degreasers, corrosion inhibitors, lubricants, anti-freeze products, and specialized cleaning agents.

1 investor

Fishbones develops well stimulation technology using a branching method that creates multiple branches from a single wellbore to connect with reservoir fractures and high-value zones. Its solutions serve oil and gas operators working in formations such as carbonates, coal bed methane, oil sands, sandstones, and basement formations to increase productivity and recovery.

1 investor

Fishbowl provides asset inventory tracking software that helps warehouses and manufacturing operations monitor physical assets, equipment, and inventory in real time. The platform integrates with QuickBooks and is designed for small to mid-sized businesses managing inventory, fixed assets, and IT resources.

1 investor

FiveStrata is a lead generation and customer acquisition marketing company that produces exclusive, call-verified residential solar leads and pre-set sales appointments for national, regional, and local clients, and applies the same model to other industries. It handles real-time data verification, TCPA compliance, and lead transfers or appointment setting for clients' sales teams.

1 investor

Fleco Power operates a marketing pool of several hundred renewable energy plants across biomass, photovoltaic, hydropower, and wind, helping producers commercialize their renewable electricity output. It offers advisory services to renewable power producers.

1 investor

Flexegraph develops graphene-based nanofluids for thermal management in data centers, computers, energy systems, and automotive applications. The company sells consumer cooling solutions under the Go Chiller brand and provides customized commercial products.

1 investor

Flexitricity operates in the flexible energy market in Great Britain, connecting participants to revenue-generating opportunities in demand-side energy flexibility. The company pioneered the flexible energy industry and has evolved from a startup into an established player in the energy sector.

1 investor

Develops geothermal energy solutions.

1 investor

Flo is a renewable energy supplier that matches 100% of customers' electricity usage with certified regional Renewable Energy Certificates and redeems them on their behalf. The company enables businesses and consumers to make legitimate renewable energy claims while supporting renewable energy generators in the region.

1 investor

Float Energy provides digital twin software for the hydrogen industry, integrating real-time forecasts of power prices, renewable generation, and CO₂ grid intensity to optimize green hydrogen production for lower cost and higher sustainability. Its OPTI-MATE platform is aimed at hydrogen producers.

1 investor

Floral Energy designs, delivers, operates, and optimises off-grid power systems for data centres, combining AI-driven control, systems engineering, and thermal management into modular, high-reliability systems. It positions itself as the control layer between the microgrid and the data centre, with a stated pathway toward nuclear power.

1 investor

Flowchem supplies drag-reducing agents (DRA) for pipeline operators, covering the full lifecycle from R&D and formulation to in-house manufacturing, fleet logistics, skid/injection systems, and field service. Its products serve oil and gas pipeline operators handling light to heavy crude, multiphase fluids, and refined fuels, aiming to increase throughput and reduce energy use and carbon intensity.

1 investor

FlowerTurbines develops small vertical-axis wind turbines that use a patented "cluster effect" to increase the output of turbines placed near each other. The company also offers investment opportunities in its wind turbine projects.

1 investor

Flui provides a platform for managing traditional and smart meter data, and optimizing energy flexibility in smart grid environments. The solution serves energy and water utilities managing complex market interactions and distributed generation.

1 investor

Fluid Clarification designs and supplies filtration and separation systems that remove liquids and solids from gas or liquid streams for industrial plants. It serves industries including oil and gas, oil sands, refining, water treatment, petrochemical, pulp and paper, and pharmaceutical, offering engineered systems, vessel upgrades, and rental filtration vessels.

1 investor

Fluid Insight develops Insight Plus, a computerized maintenance management system designed for fleet operators that consolidates scheduling, asset management, procurement, and regulatory compliance into a single platform. The system integrates with enterprise software like SAP, Salesforce, and SharePoint to help fleet operators reduce costs and improve operational efficiency.

1 investor

Fluitron manufactures precision high-pressure compression, storage, and dispensing equipment for industrial gases and hydrogen applications. The company serves customers in industrial gas, energy, petrochemicals, semiconductors, and renewable energy sectors globally.

1 investor

Fluves develops fiber optic sensing technology — using Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) — to turn a single optical fiber into a continuous, real-time monitoring system for critical infrastructure. It processes backscattered light with proprietary algorithms and delivers calibrated measurements, dashboards, and automated alerts across industries.

1 investor

Flux Drive builds magnetic soft-torque power transmission equipment, including adjustable speed drives and flexible couplings that transmit torque between a motor and load through magnetic flux rather than a physical connection. Its products serve industrial machinery applications, reducing vibration and wear and tolerating harsh environments such as extreme temperature, moisture, and chemical corrosion.

1 investor

Flux Lines offers floating, mobile shore power for ships in ports alongside grid-scale energy storage services to local power grids. The company targets maritime electrification, providing an alternative to fixed dockside charging infrastructure.

1 investor

Fluxco operates a transformer procurement marketplace that connects buyers with a global network of vetted manufacturers, using AI to translate plain-language requirements into biddable specs and managing competitive bidding. It handles the full transformer lifecycle—procurement, leasing, logistics, commissioning, service, and warranty—for utilities, commercial, and industrial customers.

1 investor

MTN is a global network operator providing integrated LEO and GEO satellite connectivity combined with terrestrial 5G/4G-LTE and Wi-Fi for enterprise, energy, maritime, and government sectors. The company serves large-scale operations including cruise fleets, offshore platforms, and remote facilities worldwide.

1 investor