Top 50 Building Energy Retrofit

Provides end-to-end energy consulting and retrofitting services for residential and commercial properties, focusing on improving energy efficiency and sustainability. By combining building data analysis, tailored ESG strategies, and implementation of measures like insulation, window replacement, and renewable energy systems, it reduces CO₂ emissions, lowers operating costs, and increases property value by up to 30%.

Kestrix utilizes thermal drones and AI-driven computer vision to map and quantify heat loss from buildings, enabling energy retrofit planning, pricing, and verification at a city scale. This technology addresses the challenge of identifying and prioritizing the 100 million homes in Europe that require retrofitting to reduce CO2 emissions from heating and cooling.

QEA Tech utilizes AI-driven software, drone technology, and thermal imaging to quantify energy loss in building envelopes with high precision. The platform identifies specific insulation deficiencies and structural issues, providing targeted retrofit recommendations that enhance energy efficiency and return on investment.

Econest acquires energy-inefficient properties and employs retrofitting techniques such as insulation upgrades and HVAC system enhancements to improve energy performance. This process reduces high operational costs and mitigates the environmental impact of outdated building systems, increasing property value within investment portfolios.

Enter provides a free, web‑based platform for German residential energy retrofits that begins with a dena‑certified video audit and creates a digital twin and individualized renovation roadmap (iSFP). Its AI‑driven engine aggregates and compares offers for heat pumps, insulation, windows and other measures from a vetted network of contractors, while automatically preparing BAFA and KfW subsidy applications. The service also coordinates installation, monitors progress, and delivers a transparent side‑by‑side pricing dashboard.

Sero provides a funded retrofit solution that combines private finance and grant funding to help social housing landlords upgrade their properties to meet Net Zero standards. By addressing the issue of energy inefficiency in over 1.6 million social homes, Sero enables landlords to reduce carbon emissions and lower energy costs for residents.

Propflo offers a suite of tools that help businesses guide their customers through the home retrofitting process. Their platform analyzes property portfolios to identify retrofit opportunities, provides customers with a white-labeled tool to explore retrofit options and obtain quotes, and offers a hub to manage the retrofit process. Propflo also provides enhanced EPC (Energy Performance Certificate) verification to understand a property's resilience and net-zero pathway.

FRAM Energy specializes in energy efficiency and renewable solutions tailored for rental homes, utilizing data-driven assessments to identify and implement energy retrofits. The company mitigates the financial risks associated with energy upgrades, ensuring landlords can enhance property value while reducing operational costs.

BlocPower utilizes proprietary technology to analyze and finance the upgrade of homes and buildings with energy-efficient, all-electric systems, including heat pumps and weatherization solutions. This approach reduces upfront costs to $0 down, making sustainable upgrades accessible while improving energy efficiency and indoor air quality.

Norm provides a digital platform that assesses the energy efficiency, CO₂ emissions, and renovation costs of buildings through expert-verified analyses and 3D modeling. This solution enables businesses to identify energy renovation potential and create tailored financing options for sustainable real estate projects.

This startup provides net-zero modernization services that utilize solar panels for carbon dioxide-free heat and electricity generation in multi-family housing. By employing industrial prefabrication, modular construction, and efficient energy systems, the company enables property owners to meet tenant energy needs while minimizing environmental impact.

Energy X provides a platform for designing and constructing zero-energy buildings using sustainable architecture technologies, including green remodeling and building-integrated photovoltaics (BIPV). This approach addresses the need for energy-efficient structures that minimize carbon emissions and comply with ESG standards in the construction industry.

Preflet Energy AI Platform utilizes machine learning to analyze multidimensional data, including smart meter readings and climate information, to generate actionable insights for improving energy efficiency in buildings. This technology enables property managers to reduce energy costs and carbon emissions without the need for significant hardware investments or technical expertise.

Ultrawatt designs and manufactures solar photovoltaic, 3D, and vegetative facades that enhance building energy efficiency and aesthetics while reducing carbon footprints. Their modular solutions transform underutilized wall space into renewable energy sources and vertical gardens, addressing urban heat islands and improving air quality.

The startup operates an IoT-enabled platform that collects and analyzes building energy data to optimize energy consumption in real estate operations. By providing actionable insights, the platform helps real estate and energy companies reduce carbon emissions and achieve significant energy and cost savings without requiring structural changes.

Enerbrain provides a cloud-based IoT solution that optimizes heating, ventilation, and air conditioning (HVAC) systems in buildings to reduce energy consumption by 12-30%. The technology enables real-time monitoring and analysis of energy use, helping facilities minimize waste and lower operational costs.

Carbon Reform develops retrofit technology for commercial buildings that integrates air quality sensors and purification systems to enhance indoor air quality while reducing HVAC energy consumption by up to 50%. Their solutions enable significant carbon emissions reduction and financial savings through improved energy efficiency and compliance with regulatory standards.

Effinigo provides IoT-based solutions for energy-efficient lighting in non-residential buildings through retrofitting existing systems with adaptive lighting controls and LED technology. This approach reduces energy consumption by up to 80%, addressing the significant waste of electricity from outdated lighting practices.

Enertiv provides a cloud‑based platform that automates collection and validation of utility data—including electricity, water, and gas—from tenant‑controlled meters using OCR, API integrations, and optional shadow‑meter hardware. The cleaned data feed real‑time greenhouse‑gas calculations and generate investor‑grade compliance reports (e.g., GRESB, SFDR, CSRD) while the built‑in analytics model asset‑specific decarbonization pathways and ROI‑linked retrofit recommendations. The solution also supports demand‑response participation, energy‑procurement optimization, and integration with existing commercial real‑estate management systems.

The startup enhances energy efficiency in commercial real estate through advanced building management systems that utilize real-time data analytics and IoT sensors to optimize energy consumption. This approach reduces operational costs and minimizes carbon footprints by identifying inefficiencies in heating, cooling, and lighting systems.

Fuchs & Eule provides a data-driven operating system for energy-efficient property renovations, offering personalized renovation plans and expert guidance throughout the process. The platform helps homeowners secure substantial government funding for energy-saving measures, significantly reducing energy costs and improving property efficiency.

Domna helps homeowners in Great Britain improve their property's energy efficiency and sustainability through comprehensive retrofitting services. They offer solutions such as insulation, glazing, LED lighting, and renewable energy installations like heat pumps and solar panels.

This startup provides engineered technology services and develops renewable energy projects that focus on decarbonizing heating and cooling systems in buildings. By utilizing proprietary technologies, the company aims to significantly reduce carbon emissions and lower energy costs for facility operators.

Enerithm's EnerGuide is an AI-powered platform that analyzes building energy usage to provide tailored recommendations for optimization and emissions reduction. The platform helps real estate stakeholders improve energy efficiency, meet compliance standards, and lower operational costs through data-driven insights.

Climative utilizes AI-assisted digital energy assessments and blockchain technology to create personalized low-carbon plans for buildings, enabling owners to make informed decisions that reduce emissions and enhance energy efficiency. This approach facilitates secure collaboration among homeowners and service providers, streamlining the process of building retrofits and contributing to the decarbonization of the built environment.

Eliot provides a sensor-based system that optimizes heating and ventilation in commercial buildings, enabling energy consumption reductions of up to 30%. By integrating with existing infrastructure, the solution adjusts operations based on occupancy, resulting in lower energy costs and improved indoor climate.

Domna provides a retrofit assessment software that utilizes machine learning to deliver accurate, costed energy efficiency improvement plans for homes in Great Britain. The platform addresses the high costs and complexity of retrofitting by streamlining the process of securing funding and coordinating trusted tradespeople for energy upgrades.

INOVUES provides non-invasive window retrofit technology that enhances existing glazing systems by transforming single- and double-pane windows into high-performing multi-pane systems, improving insulation by up to ten times. This solution reduces energy consumption and carbon emissions by up to 40% without the need for replacement or disruption to building operations.

This startup offers an automated architectural design tool that generates personalized floor plans within existing buildings. The platform provides data-driven insights on efficiency, costs, and carbon emissions, while adhering to architectural and regulatory constraints, enabling faster feasibility studies and retrofits.

This startup designs colored solar panels and facade systems that integrate seamlessly into building exteriors, enabling structures to generate more energy than they consume. By facilitating the transition to energy-efficient smart cities, their technology contributes to sustainable urban development and reduces reliance on traditional energy sources.

Warmur provides personalized Green Home Upgrade Plans that integrate heat pumps, solar panels, and battery storage to optimize energy efficiency and reduce carbon emissions in residential properties. By utilizing advanced simulations and tailored energy tariffs, the platform enables homeowners to achieve up to 75% reduction in their carbon footprint and significant annual savings on energy bills.

EcoEdge AI optimizes building energy consumption and reduces carbon footprints using AI and cloud computing. Their platform autonomously manages building systems to enhance thermal comfort and decrease electricity usage, providing a secure and reliable solution for energy efficiency.

Reshape Energy provides a platform that offers building owners and tenants a suite of energy services, including energy performance assessments, contract structuring, and ongoing management, to reduce energy costs and enhance property value. The solution targets high energy expenses and sustainability compliance in buildings, facilitating optimized energy usage and long-term financial benefits.

REsustain utilizes a calibrated Digital Twin and automation technology to optimize energy management in real estate, significantly reducing energy consumption and carbon emissions. By providing real-time data and scenario modeling, the platform enhances building performance and tenant comfort while minimizing capital expenditures.

Heero Technologies offers the Heero App, a platform that provides homeowners with personalized energy efficiency recommendations and guides them through the energy retrofit process. The app addresses the need for improved energy performance in homes by delivering accurate, tailored information and facilitating the installation of energy efficiency and renewable technologies.

Enido provides a complete energy solution for Swiss single-family homes by integrating photovoltaic systems, energy storage, and charging infrastructure with an intelligent energy management system. The startup aims to transform these homes into CO2-neutral and energy-efficient buildings, facilitating a transition to sustainable energy in Switzerland.

Cleanbrix provides a web-based analytics platform that utilizes AI-driven data processing to deliver detailed investment analyses and optimized decarbonization roadmaps for real estate assets. The platform enables asset owners and managers to efficiently evaluate retrofit options, minimizing risk while aligning ecological and economic objectives.

The startup provides energy efficiency upgrades for commercial buildings by identifying and eliminating energy waste through enhancements in heating, cooling, lighting, and control systems. Customers pay a monthly service fee that is offset by the energy savings generated, creating a self-funding model that improves operational performance and reduces energy costs.

The startup provides a standardized heating and cooling solution using heat pump systems for multi-family and commercial properties, facilitating automated planning and plug-and-play installation. This approach enables property owners and energy suppliers to efficiently decarbonize their buildings, addressing the need for sustainable energy solutions in existing real estate.

The startup develops an energy conservation platform that integrates advanced power electronics with building management systems to optimize air conditioning efficiency. This technology reduces electricity consumption, enabling clients to lower their energy costs significantly.

Zeroth develops bioclimatic heating and cooling systems that utilize naturally-amplified energy from water and sunlight to meet the thermal needs of buildings. This technology integrates with existing infrastructure, providing a non-invasive solution for reducing energy consumption and carbon emissions in both new and retrofitted structures.

Azero offers integrated hardware retrofits and smart software to reduce building energy consumption and carbon footprint. The company manages the entire process, including financing and operational optimization, to deliver guaranteed energy savings for building owners.

ADAPT AI provides an AI-driven platform that generates tailored retrofit investment plans for commercial real estate, enabling rapid assessment and optimization of building portfolios. By simulating various renovation scenarios, the platform enhances profitability while effectively reducing greenhouse gas emissions across real estate assets.

Vertify Analytics provides a software platform that utilizes UAVs and AI-powered image recognition to conduct comprehensive inspections of urban infrastructure, capturing 100% of building envelopes efficiently. The platform automates fault detection and reporting, enabling precise identification of energy retrofit opportunities and compliance documentation for restoration projects.

Radiant Labs provides APIs and energy modeling tools that connect homeowners with contractors for home energy upgrades, fuel switching, and renewable energy installations. The platform delivers detailed insights on energy usage, HVAC sizing, and carbon emissions, enabling efficient electrification of buildings while optimizing financial and environmental outcomes.

Provides a web-based platform using the Home Energy Model (HEM) to analyze and optimize domestic building energy designs, replacing SAP for UK building regulations. HEM models annual energy use dynamics, enabling precise value-engineering of low-energy homes through high-resolution outputs, detailed reporting, and integration with APIs.

The startup develops a wireless lighting control system that retrofits existing and new building infrastructure, enabling seamless installation and management of lighting through a centralized platform. This technology provides clients with enhanced control and tracking capabilities, reducing installation complexity and improving energy efficiency in building operations.

IKOSIA provides a streamlined service for energy renovation by offering personalized energy efficiency assessments and tailored renovation plans, ensuring clients maximize government funding opportunities. The platform connects homeowners with certified energy consultants and qualified contractors, enabling significant reductions in energy costs and consumption through targeted upgrades.

Retrolux offers a Smart Energy scaleOS software platform that digitizes energy audits and proposal processes for lighting and energy retrofit contractors. This technology reduces errors, shortens sales cycles, and enhances project management efficiency, enabling businesses to deliver professional proposals and streamline installations.

NoGasCo offers Dutch homeowners a turnkey solution to replace natural‑gas heating and obtain an A‑energy label. Through an online Ready Scan it assesses current performance, creates a customized retrofit plan and manages certified contractors, subsidy applications and the final energy‑label inspection, all for a fixed price per dwelling type. The service includes project tracking via a customer portal and delivers the certified label within 48 hours.