Top Energy Efficiency Startups in 2026

Ohmconnect is a software based power plant. Instead of turning on a dirty coal or gas power plant during times of peak demand, Ohmconnect has hundreds of users reduce their electricity. Best part is that instead of paying dirty gas power plants to turn on, ohmconnect can pay its users to turn down. When users sign up, they are told when to reduce their electricity. If they participate, their energy reductions can be sold into the markets as additional generation. Ohmconnect hooks into users' wifi thermostats, electric cars, and smart devices to automate these reductions. Our users are presented with a clean visualization of where their energy is coming from and where their energy is going. For each event that they participate in, they earn Ohmconnect points which can be cashed out at any time.

Sparkfund is an energy technology subscription company based in Washington, D.C. We give customers access to essential building energy functions and outcomes — like cold air, light and resilience to storm events — without the constraints of ownership, enabling them to do more energy projects, faster, and with fewer resources. We strive to create positive change by deploying solutions that are good for business and good for the planet. And we’re building a diverse and collaborative culture to help us achieve all of that.

Sense provides high-resolution energy monitoring for your entire home. Sense analyzes one million samples per second to provide you with energy insights, home awareness, and peace-of-mind from anywhere.

Amperon is the leading analytics and forecasting company for the energy transition. We are venture-backed with support from leading venture and strategic investors who deeply understand energy and software. We are experiencing rapid growth on the back of a killer product that delivers compelling value for energy market participants on both the supply (power & utilities companies) and demand (large energy users) sides of the market. The company is 6 years old, with co-founders that have fused the best-of-breed from the energy (power trader at leading power generators and financials) and technology (data science and engineering at scaling tech companies) industries into a high-performance culture, with the following core values: • We fill in the blanks • We are reliable • We are customer-aligned • We are relentless • We do the hard things • We stay curious The company’s headquarters is Houston, TX, the energy transition capital of the world, but we operate as a highly effective distributed team, spread across the globe.

TerraVerde Renewable Partners, LLC (“TerraVerde”) develops energy management programs and distributed solar generating facilities for local and state governments, school districts, non-profits and commercial real estate owners. We advise our clients on the project development process, performing quantitative cost-avoidance analyses, holding financing and procurement bid processes, overseeing project construction, and performing continued project management. Our energy management and solar energy facilitates allow our clients to replace traditional electricity purchases with a long-term, inflation-hedged energy supply.

Tetra is leading the clean energy transformation by adding transparency and efficiency into a forgotten industry. Home improvement contractors are left in the past, lacking automation and technology to run and scale their small business. This leaves homeowners without the necessary information to make easy, fast decisions and creates a painful buying process. Homeowners are unaware they can reduce carbon emissions and lower their utility bills. We provide the most efficient and affordable options to homeowners, improve their experience, and coordinate the installation of home improvement projects. In doing so, we're “super powering” contractors by automating admin tasks and allowing them to focus on installation excellence and customer happiness. We’re starting by transforming heating and cooling replacements, a $120 billion industry which makes up 12% of total energy usage in the US. Federal and state government agencies allocate billions of dollars in incentives to help homeowners choose high-efficiency systems—now at unprecedented levels thanks to the Inflation Reduction Act of 2022—but the dollars are historically underutilized due to lack of customer awareness. We’re democratizing and unlocking those incentive dollars. We started in Massachusetts, where we’re now 4%+ of the heat pump replacement market, and launched in New York in mid-2024, where we’re already seeing great traction, validating that our model has the potential to scale nationwide. With backing from the likes of Lerer Hippeau, Gutter Capital, Greycroft, and others, we’re now preparing to do exactly that.

Xempla is the world’s first decision support system for enterprise asset management, designed to provide any operations and maintenance team with the tools, resources and assistance they need to make better decisions throughout the asset lifecycle. We are building the most reliable and easy-to-use EAM tool on the market, helping O&M teams thrive in an increasingly digital, data-first environment. We have recognised some of the most pressing challenges facing the industry - from a widening skill gap to an ageing workforce and shortage of newcomers into such roles, creating an urgent need to retain and transfer knowledge, coupled with the significant costs of capacity building. And we’ve made sure we’ve covered it all, so asset and facility management companies can focus on delivering positive outcomes for their customers, driving their teams forward, and growing their business.

Solar, EV charging and storage installations for commercial and residential customers.

We are energy specialists that help clients take a strategic approach to their energy requirements in a way that vendors do not. We are indifferent to technologies, existing relationships, markets, or solutions. Energy services have become siloed and the failure to coordinate supply and demand services creates significant risks and is difficult to manage. We work across different teams to help design solutions for the entire energy portfolio that align to an organization’s goals, targets and spend. This unique approach allows us to design solutions that span across energy disciplines, from supply and demand to renewables and maintenance. We use data analysis to produce valuable insights and expose unaddressed risk you may have overlooked.

Thank for you taking interest in our Startup, we are still keeping in Stealth mode and we will be launching the site and start Digital Marketing pretty soon. We at Ramanujan Inc, are creating an Advanced Energy Platform, which is first of its kind in the world. We are solving some key challenges faced by the Energy service providers and consumers. To put in a nutshell we are launching a) Connectivity from Device to enabling energy service for Utilities and Consumers b) APIs, for the length and breadth of Energy Sector over which various energy services, analytics and market place will be provided. The idea is already validated and extremely well accepted by the clients and we are in the process of signing up large deals based on our PoC and soon to be launched beta version. For the launch of platform we are looking for few key resources to work on the Platform. There are multiple reasons to look at our startup, some of them are – - Idea validated by customers and ready for commercialization - The best brains from Bay Area, who have played key role at Netflix, Apple, FB , Yahoo and Symantec’s are leading the technology - Includes stock Options Let me know if you are excited to discuss with us.