Top 50 Building Energy Retrofit

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.

Stunning Green utilizes advanced retrofitting techniques to enhance the energy efficiency of existing buildings, thereby reducing their carbon emissions. This approach directly contributes to global efforts for climate neutrality by lowering the overall environmental impact of urban infrastructure.

GoRetro is a digital platform that utilizes AI and remote sensing data to provide homeowners with energy assessments, retrofit recommendations, and access to financing options through government rebates and private institutions. The platform connects homeowners, municipalities, and service providers, facilitating targeted lead generation and streamlined project management to enhance energy efficiency in residential buildings.

Kestrix uses non-invasive machine learning and computer vision to map and quantify building heat loss at city scale. This technology enables energy retrofit planning by validating existing EPC data and rapidly prioritizing which homes require immediate attention. The platform also helps accurately price necessary retrofit interventions and verify decarbonization progress for stakeholders.

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%.

This startup specializes in the digitalization and automation of drinking water systems and heating networks to enhance energy efficiency in buildings. By implementing advanced monitoring and control technologies, the company enables clients to reduce energy costs and achieve climate neutrality.

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.

VundaHaus provides a rapid external wall insulation (EWI) system for residential retrofits, utilizing 3D scanning and factory-fabricated panels for precise, quick installation. The system enhances thermal performance and building health while integrating solutions for electrified homes.

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.

This startup provides an AI-powered platform that uses computer vision to identify energy efficiency improvements in commercial buildings. It helps property owners and energy managers reduce operational costs and accelerate sustainability outcomes by modeling implementation scenarios and tracking regulatory compliance.

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.

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Enverdex provides a data-driven platform for planning building retrofits using its Praevion engine. This engine simulates and evaluates numerous retrofit combinations based on building physics and city-specific data. The service delivers optimization insights that balance carbon savings, cost efficiency, and regulatory compliance for building portfolios.

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.

Maesin transforms external thermal imaging into actionable diagnostics and PAS 2035-compliant documentation for building fabric upgrades. The platform uses AI analysis, validated by Level 2 thermographers, to accurately pinpoint and prioritize thermal anomalies across property portfolios. This provides retrofit teams with auditable recommendations and scalable reporting necessary for compliant delivery.

NOVO digitizes and accelerates the process for residential energy efficiency retrofitting. The platform enables homeowners to quickly assess their building's potential and receive an individualized energy renovation roadmap (iSFP). This streamlined approach helps secure government subsidies like KfW and BAFA for faster, cost-effective building modernization.

Provides a software-as-a-service (SaaS) platform for managing residential insulation retrofit projects, streamlining the assessment, planning, and execution processes. It addresses inefficiencies in energy efficiency upgrades by offering tools for precise measurement, cost estimation, and project tracking, helping homeowners and contractors reduce energy consumption and improve comfort.

epIMS offers a platform for property owners to assess energy performance and receive tailored retrofit recommendations. Our service provides cost-effective, data-driven insights to help achieve regulatory compliance and reduce energy bills.

HomeWise AI provides a SaaS portal called MyHome that enables residential energy retrofit contractors to manage projects with homeowners more efficiently. The platform digitizes document exchange, contract signing, progress tracking, and referral incentives, reducing administrative overhead and improving conversion rates. HomeWise AI monetizes through subscription fees from contractors and program implementers while facilitating rebate distribution and job creation in underserved communities.

Cadence OneFive provides a platform for multifamily property owners to manage energy efficiency retrofits from initial planning through construction. The system streamlines scope generation, standardized bidding, and portfolio optimization to accelerate decarbonization efforts. This results in faster project execution, optimized capital allocation, and improved asset value for real estate portfolios.

Underheat develops software and products that streamline the design and installation of heat pump systems, significantly reducing internal work to just three hours per installation. Their technology lowers heating costs by 35% and stabilizes wall temperatures, mitigating issues of mould and damp in existing buildings.

Furbnow provides expert guidance and project management for home energy efficiency upgrades, including insulation, solar installations, and heating systems. By conducting professional surveys and connecting homeowners with vetted installers, Furbnow ensures effective energy improvements that can reduce carbon emissions by up to 2.2 tonnes annually and save homeowners an average of £1,826 on energy bills.

VARM specializes in blow-in insulation technology, utilizing eco-friendly materials like cellulose and wood fiber to enhance energy efficiency in residential buildings. By improving thermal performance, their solutions can reduce heating costs by up to 50% while also qualifying homeowners for government subsidies of 20%.

FutureFit Partners simplifies the process for multifamily property owners to implement building electrification and energy upgrades. They identify high-ROI opportunities, secure available financial incentives, and manage contractor networks for seamless project execution. This service increases Net Operating Income (NOI) and enhances property value through modern HVAC, solar, and EV charging installations.

GreenWise Holland provides BRL 9500‑certified EPA‑W and EPA‑U energy labeling for Dutch residential and non‑residential buildings, performed by NTA 8800‑qualified advisors who conduct on‑site measurements and issue official certificates. The service also includes a customized retrofit advisory report with cost‑benefit, ROI and CO₂‑reduction analysis, plus a phased implementation roadmap delivered through a secure digital portal. This enables property owners, managers, developers and lenders to meet regulatory compliance and plan energy‑efficiency investments.

Oserkaf manufactures structural insulated panels for building exteriors, providing continuous insulation in a single layer. These panels can be combined with solar film to create energy-independent structures and can also be used for interior retrofits to convert unused spaces into living areas.

PrePower Booster integrates a green‑hydrogen fuel‑cell generator with a variable‑capacity heat pump to produce up to 10 kW of thermal energy and 3 kW of electricity, delivering high‑temperature space and water heating while supplying on‑site power that eases grid peaks. The plug‑and‑play system retrofits existing boiler connections for single‑family homes to multi‑unit buildings, enabling low‑carbon heating upgrades for contractors, utilities and developers across Europe.

Solskin provides adaptive solar façades that combine dynamic shading with photovoltaic generation to optimize building energy performance. Its AI‑driven control system adjusts solar heat gain and interior lighting based on climate and occupancy, reducing energy consumption by up to 80 %. The modular, retrofit‑ready design integrates with building automation for offices, residential, industrial and institutional projects.

Oxoia provides AI-driven software that continuously monitors building energy systems to identify inefficiencies and automatically implement optimization measures. Its solutions reduce energy consumption and CO₂ emissions by up to 35% without requiring hardware upgrades or specialized expertise. The plug‑and‑play platform delivers rapid ROI, typically within a year, for commercial, industrial, and institutional properties.

SustainCRE transforms underperforming commercial real estate into high-value assets through AI-driven green retrofitting and strategic market repositioning. The company optimizes whole-life costs and reduces embodied energy, aiming to achieve a net operating income premium and accelerate project delivery.

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.

The startup manufactures flexible light-emitting diode (LED) lighting sheets that retrofit existing fluorescent fixtures, providing a low-cost and energy-efficient lighting solution. This technology enables buildings to transition to LED systems, significantly reducing energy consumption and operational costs.

GL1 offers an AI-powered platform that helps financial institutions optimize green lending by providing climate insights for mortgage and retrofit products. Its tools leverage thermal satellite imagery and AI to assess property energy performance, map decarbonization pathways, and inform precise targeting, pricing, and risk management.

KANISU provides energy management solutions for commercial buildings, leveraging data analytics and automation to optimize energy consumption. Their platform identifies inefficiencies and implements real-time adjustments to HVAC, lighting, and other systems, reducing energy costs and carbon footprint. This allows building owners to achieve sustainability goals while improving operational efficiency.

Kiona is a PropTech platform that integrates legacy and modern building management systems to optimize energy consumption and reduce carbon emissions. By utilizing AI-driven energy optimization and real-time environmental monitoring, Kiona helps property stakeholders enhance resource efficiency and achieve sustainability goals.

This startup develops indoor comfort and energy control systems that utilize historical, real-time, and predictive data to optimize building energy consumption and indoor climate. By employing advanced control algorithms, the company enables real estate operators to enhance operational efficiency, reduce energy costs, and generate revenue through grid balancing.

AirEx manufactures smart air bricks that optimize airflow in homes with suspended floors, significantly reducing heat loss and improving energy efficiency. Their technology enhances energy performance certificates (EPC) by 2-5 SAP points, resulting in lower fuel bills and increased thermal comfort for occupants.

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.

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.

Provides a smart energy management system that retrofits existing breaker panels to enable circuit-level load control, real-time monitoring, and integration with battery storage and solar systems. This system reduces energy costs by optimizing demand response, extending battery backup, and maximizing solar export incentives, all while maintaining compatibility with major brands like Tesla and Enphase.

LEDCity develops energy-efficient, autonomous lighting systems that utilize smart algorithms and integrated sensors to optimize light intensity and duration based on real-time needs. This technology significantly reduces energy consumption by up to 80% compared to traditional LED systems, addressing high energy costs in commercial buildings.

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.

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.

Domna provides end-to-end whole house retrofit services, combining proprietary software for remote assessment with on-the-ground project coordination. The company manages energy efficiency upgrades, including insulation and heat pump installation, to improve property performance and value. They also assist clients in securing relevant government funding schemes for these deep retrofit projects.

Atrium Energy provides an AI-driven platform that continuously ingests electric, gas, and water utility data for commercial real‑estate portfolios to identify high‑impact efficiency upgrades. The service handles design, permitting, procurement, installation, and ongoing performance monitoring while financing projects through a cash‑flow‑aligned model that delivers savings without upfront capital. A portfolio‑level dashboard consolidates utility metrics, savings reports, and asset‑value impacts, enabling owners to capture cost reductions and additional revenue streams such as grid services and solar generation.

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.

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.

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.

RIISE utilizes AI and satellite technology to automatically scan global cities, identifying high-value building upgrade opportunities and qualified sales leads. This platform enables businesses to enhance operational efficiency, reduce costs, and maximize revenue potential through targeted outreach and actionable insights.

Enerithm provides EnerGuide, a digital platform for energy consulting and building performance analysis. The platform uses AI and existing LoD2 building data to automatically calculate energy demand compliant with GEG and DIN V 18599 standards. This enables users to quickly generate legally compliant energy performance certificates and simulate prioritized renovation measures with clear cost and savings potential.