Energy Startups

Rune Energy develops solar power systems using an integrated approach spanning PV arrays, DC power delivery, integration architecture, and software and controls. The company focuses on full-stack hardware and software for solar energy generation and load management.

4 investors

Salient Energy manufactures zinc and manganese batteries for electricity storage, providing an alternative to lithium-ion with lower costs and reduced environmental impact from mining and manufacturing.

4 investors

Sapient Industries provides advanced energy submetering and monitoring systems for commercial and residential properties, helping facility managers track energy consumption, reduce costs, and achieve decarbonization goals. The company serves enterprise customers, real estate developers, service providers, and energy consultants with integrated hardware and analytics solutions across industries including manufacturing, retail, healthcare, and multi-tenant residential buildings.

4 investors

Sensibo makes smart controllers and sensors that add remote control, automation, and geofencing to existing air conditioners and heat pumps, along with indoor air quality monitoring for pollutants like CO2, VOCs, and PM2.5. Its products, aimed at homes and enterprise building management, use AI to reduce energy use and improve indoor climate and air quality.

4 investors

Shifted Energy develops a Distributed Energy Resources Management System (DERMS) platform for utilities to control and optimize virtual power plants at the grid edge. The software enables utilities to forecast, dispatch, and scale distributed energy resources across their grids through asset-level visibility and device integration.

4 investors

Shine Fusion develops nuclear technology solutions aimed at building a more sustainable world. The company is focused on advancing nuclear science and related clean energy applications.

4 investors

Shoreline provides algorithm-driven simulation and planning solutions for wind farm construction and operations, enabling resource optimization and business case analysis. The platform integrates with enterprise systems to help operators visualize, schedule, and optimize complex field service scenarios while reducing costs and downtime.

4 investors

Shyft Power Solutions is an energy technology company that builds digital metering, operating, and revenue management software for utility companies and power service providers in emerging markets. Part of the SteamaCo Group, it focuses on digitizing energy infrastructure to expand access to reliable and cleaner power.

4 investors

SIGA provides operational technology (OT) cybersecurity solutions for oil and gas infrastructure, monitoring raw electrical signals from industrial control systems to detect cyberattacks and malicious manipulation of critical assets before processes are compromised. The platform offers multi-level visibility, real-time threat detection, and incident response support specifically designed for legacy systems used in refineries, pipelines, and upstream platforms.

4 investors

Singularity Energy builds grid modeling and carbon accounting software, combining grid physics, certificate accounting, and data engineering to support emissions measurement and grid decarbonization. Its work centers on energy data infrastructure and standards such as the GHG Protocol's Scope 2 framework.

4 investors

SIRC develops IoT sensor devices and cloud platform solutions for energy monitoring and digital transformation. The company's core SIRC device enables contactless measurement of electrical current, power, angle, and frequency across industrial equipment and infrastructure.

4 investors

Sizable Energy develops offshore pumped hydro energy storage technology that uses reservoirs and reversible pump-turbines to store energy at sea. The company serves renewable energy operators and grid operators seeking long-duration energy storage solutions.

4 investors

SOLARCYCLE provides recycling services for solar farm components including solar panels, inverters, transformers, cables, and other power electronics, diverting waste from landfills and recovering metals such as silver, copper, gold, and lead. It serves solar companies in the US with certified recycling, refurbishment, and reporting for clean energy circularity.

4 investors

Solaria manufactures high-efficiency solar panels, including its PowerXT and PowerX product lines, and provides related datasheets, installation guides, and technical documentation. The company serves the solar energy market with photovoltaic modules for AC and DC installations.

4 investors

Solfácil is a Brazilian solar energy company that provides financing, photovoltaic equipment distribution, and technology tools for solar installers across the country. It serves a network of solar integrator partners with equipment such as panels, inverters, batteries, and monitoring systems for residential, commercial, industrial, and agricultural projects.

4 investors

Solfium provides solar energy, energy storage, and electric mobility solutions for residential, business, industrial, and corporate customers. It offers quotes and savings calculations for its clean energy products.

4 investors

Solid Power develops all-solid-state battery technology for automotive applications. The company licenses its sulfide-based solid electrolyte and cell designs to automotive manufacturers and battery producers.

4 investors

Soma operates an energy intelligence platform that connects power generation, battery storage, and large energy loads such as data centers into a real-time coordination layer to optimize and deliver power. Its tools automate energy procurement and hedging, aggregate batteries for grid stabilization, and orchestrate compute workloads around energy demand, serving AI data centers and independent power providers.

4 investors

Spark provides AI-powered permitting and zoning intelligence for renewable energy, battery storage, and data center developers to accelerate site selection and reduce development risk. The platform analyzes zoning ordinances, permitting requirements, and community sentiment across U.S. jurisdictions.

4 investors

Spiritus develops direct air capture (DAC) technology to remove carbon dioxide from the atmosphere and sequester it, providing a scalable and modular system for carbon dioxide removal at lower cost.

4 investors

SpotLight provides sparse seismic monitoring for carbon capture and storage (CCS/CCUS) projects, using a single seismic source and receiver to detect subsurface changes such as CO2 presence, pressure, and fluid movement. It serves reservoir and production engineers with predictive maintenance and dynamic subsurface detection using standard acquisition equipment.

4 investors

Starlight Engine develops fusion energy technology and aims to demonstrate commercial fusion power generation using advanced superconducting tokamak (FAST) technology. The company integrates research and industry expertise to advance fusion energy toward industrial implementation and societal deployment, with focus on Japan-origin technology for global markets.

4 investors

Stone designs and manufactures power generation turbines from the ground up, starting with natural gas turbines shipping in 2027, followed by steam, geothermal, and advanced cycles. The company aims to rebuild industrial manufacturing capacity for large-scale turbine production.

4 investors

Suena develops algorithmic energy marketing software for battery storage systems and renewable energy assets. The company enables energy transition through transparent and profitable optimization of energy trading and storage operations.

4 investors