Startup@ISH 2027

Country: Germany
Founded: 2022
Sector: Energy + Heat + Water
Stage: Early
Innovation: A solar-electric building concept with photovoltaics, infrared heating, and an eco-boiler is the best option for a sustainable heating and energy transition in the building energy sector.
ISH Top Theme: Solutions for sanitary rooms, solutions for water-bearing systems, solutions for heat generation, solutions for intelligent building control
Top Solution Field: Heat transition and climate protection

www.elio.eu

Land: Sweden
Gründungsjahr: 2016
Bereich: Energy
Stage: Early + Heat
Innovation: The company has taken a pioneering step forward by using natural expanded graphite to radically improve the performance of modern waterborne underfloor heating systems. This innovative solution not only reduces the amount of screed, but also offers a functional and easy installation that allows the system to quickly regulate the temperature. This is particularly advantageous both in new construction and renovation.
ISH Top-Thema: Energy efficiency and sustainability
Top-Lösungsfeld: Solutions for sanitary rooms, Solutions for water-bearing systems, Solutions for installation, Solutions for heat generation

www.xyclimate.se

Country: Germany 
Founded: 2019 
Sector: Energy 
Stage: Growth 
Innovation: Wattro transforms equipment management for businesses through a patented combination of RFID technology and QR codes. Devices are automatically tracked as they leave storage – without manual scanning. This saves time, prevents losses, and ensures compliance with maintenance and inspection deadlines. The seamless integration into existing workflows significantly improves efficiency for craft businesses and the SHK sector. 

ISH Top Theme: Software solutions 
Top Solution Field: Software solution service 

https://www.wattro.de

Country: Germany 
Founded: 2022 
Sector: Water, Energy 
Stage: Growth 
Innovation: Steitz-Innovation has developed the Magnetite Compact Separator MK I, which offers up to 95% faster installation and reduced assembly risks compared to conventional separators. With its innovative cleaning concept using a functional ball, the system allows for dry cleaning without refilling system water—even during pump operation and without system downtime. This groundbreaking technology significantly improves the efficiency and maintenance process of water-bearing systems. 

ISH Top Theme: Solutions for water-bearing systems 
Top Solution Field: Energy efficiency and sustainability 

https://steitz-innovation.de/

Country: Germany 
Founded: 2023
Sector: Water, Energy 
Stage: Growth 
Innovation: Unocconi specializes in the online distribution of innovative shower heat recovery solutions. These systems are DVGW-certified, comply with DIN 94678, and have never been available in Germany before. While similar products have already seen widespread adoption across Europe – with over 10,000 installed Joulia (CH) shower drains and more than 100,000 Counter Flow (NL) shower pipes – they remain largely unknown in Germany. Unocconi aims to introduce these high-efficiency solutions, which boast up to 69% heat recovery efficiency, helping to drive the energy transition forward. 

ISH Top Theme: Solutions for sanitary spaces, solutions for water-bearing systems, solutions for installation 
Top Solution Field: Energy efficiency and sustainability 

https://unocconi.com

Othermo
Country: Germany
Founded: 2018
Sector: Energy
Stage: Growth
Innovation: Othermo digitizes and optimizes heating systems and energy centers for energy suppliers, municipal utilities, and the housing industry. Its IoT gateway enables manufacturer- and technology-independent digitalization. Through the web-based portal, customers can monitor their systems, receive plain-text error messages, and optimize them remotely. This reduces CO2 emissions by 14-20% and on-site operations by 35%.

ISH Top Theme: Solutions for heat generation, Solutions for intelligent building control, Software solutions
Top Solution Field: Energy efficiency and sustainability

https://www.othermo.de/

Country: Germany
Founded: 2013
Sector: Energy
Stage: Growth
Innovation: Meister1 provides a dynamic SaaS solution for digitizing the quoting process in craft businesses. Through smart queries, collaborative functions, and fully automated processes, the software enables efficient quote generation and seamless collaboration between all stakeholders. Even non-experts can quickly create precise, customer-specific quotes that persuade and convert. Intelligent templates and automation processes enhance efficiency, maximize customer satisfaction, and fill a gap that existing industry solutions have yet to address.

ISH Top Theme: Software solutions
Top Solution Field: Software solution service

https://meister1.de

Country: Germany 
Founded: 2024 
Sector: Energy 
Stage: Early 
Innovation: HalloPetra introduces Petra, an AI-powered virtual assistant designed specifically for craft businesses. Petra automatically handles calls, conducts natural conversations, qualifies customer inquiries, and assists with appointment scheduling. By reducing administrative burdens, Petra enhances efficiency and allows professionals to focus on their core business. 

ISH Top Theme: Software solutions 
Top Solution Field: Software solutions service 

https://hallopetra.de

Country: Germany 
Founded: 2024 
Sector: Energy 
Stage: Pre-seed 
Innovation: 1to3 energy provides a digital collaboration platform for energy-efficient renovations, enabling craft businesses and energy consultants to work together seamlessly. By automatically connecting different trades, requests can be efficiently shared, and customer projects can be managed collaboratively. This results in regional renovation hubs that serve as a central point of contact for homeowners planning renovations. The platform optimizes workflows, saves time, and increases project opportunities for businesses. 

ISH Top Theme: Software solutions 
Top Solution Field: Software solution planning 

https://1to3.energy

Country: Netherlands
Founded: 2022
Sector: Heat + Water
Stage: Growth
Innovation: The NEStore is an innovative heat battery with a very high insulation value and very large storage capacity. This makes it possible to store energy for several days. This allows users to store energy at the most sustainable and cheapest time and use it when they need it. The NEStore uses a patented, only 3 cm thin, vacuum insulation and an innovative design that minimizes the number of heat bridges.
ISH Top Theme: Solutions for sanitary rooms, Solutions for water-bearing systems, Solutions for installation, Solutions for heat generation
Top Solution Field: Energy efficiency and sustainability

https://www.newton.energy/en

Country: Germany 
Founded: 2021 
Sector: Energy, Heat 
Stage: Early 
Innovation: wattgeht GmbH provides tailored solutions to enhance energy efficiency in buildings. Utilizing their patented software and planning expertise, wattgeht manages the design and implementation of heat pump systems, conducts hydraulic balancing, and supports tradespeople with comprehensive services. Their offerings are aimed at owners of single and multi-family homes, as well as the housing industry, seeking to transition to environmentally friendly and efficient heating technologies. 

ISH Top Theme: Energy efficiency and sustainability  
Top Solution Field: Solutions for heat generation, solutions for installation 

https://wattgeht.de

Country: United Kingdom 
Founded: 2021 
Sector: Heat + Air + Cooling 
Stage: Seed 
Innovation: Barocal is developing a groundbreaking cooling and heating technology based on solid refrigerants. The innovation lies in the world’s first solid-state refrigeration technology that achieves the thermal performance of gases while operating without greenhouse gases (GWP = 0). This solution delivers 2-3 times higher energy efficiency, is modular, cost-effective, and seamlessly integrates into existing HVAC systems, drastically reducing emissions and energy costs.  
ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for heat generation, Solutions for indoor air, Solutions for the manufacture of HVAC products 

https://barocal.com

Country: Switzerland 
Founded: 2015 
Sector: Water, Energy 
Stage: Growth 
Innovation: Swiss Eco Line AG develops sustainable water usage and treatment solutions. Their flagship product, the Swiss Eco Tap, is a cold water faucet with innovative spray technology, reducing water consumption to less than 1 liter per minute. This results in significant savings in water, energy, and CO₂ emissions. The company’s business model relies on a platform strategy and partnerships to provide comprehensive, eco-friendly services for efficient and secure water use. 

ISH Top Theme: Energy efficiency and sustainability Solutions for sanitary rooms 
Top Solution Field: Solutions for sanitary rooms 

https://www.swissecoline.com/

Country: Netherlands 
Founded: 2015 
Sector: Water, Energy 
Stage: Growth 
Innovation: Hamwells has developed the Blue WWHR system, an innovative wastewater heat recovery solution specifically designed for single-floor applications. This technology captures thermal energy from wastewater to preheat incoming water, achieving up to 60% energy savings. It reduces strain on hot water installations, enabling smaller heaters, lowering operating costs, and extending equipment lifespan. With its compact, scalable design, Blue WWHR promotes sustainable, energy-efficient operations while significantly reducing carbon footprints. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for sanitary rooms 

https://hamwells.com/en/

Country: Germany 
Founded: 2024 
Sector: Energy 
Stage: Seed 
Innovation: noah:ENERGY provides a digital platform for optimizing energy management in buildings. Using IoT-based consumption monitoring and self-learning algorithms, the system enhances energy efficiency, reduces heating costs, and minimizes CO₂ emissions. The innovation lies in a maintenance-free, batteryless technology that integrates spatial usage and weather data, delivering immediate climate protection benefits without requiring extensive structural modifications. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for intelligent building control, software solutions 

https://noah.tech

Country: Canada 
Founded: 2020 
Sector: Water, Energy 
Stage: Early 
Innovation: RainStick Shower has developed a game-changing recirculating shower technology that treats and reuses water in real-time, reducing water and energy consumption by up to 80% without compromising the luxury shower experience. By significantly lowering water and energy usage, RainStick offers unique annual cost savings with a payback period of just 3–5 years. This innovative approach plays a vital role in promoting sustainable resource management. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for sanitary rooms 

https://rainstickshower.com

Country: Portugal 
Founded: 2015 
Sector: Water, Energy 
Stage: Early 
Innovation: Heaboo creates innovative self-powered solutions for domestic hot water systems, eliminating waiting times for hot water while reducing energy consumption. Our patented technology uses phase change materials within a self-powered thermal battery to provide a constant and instantaneous hot water supply at the tap, 24/7, without requiring an electricity connection or DHW recirculation systems. This groundbreaking innovation enhances thermal energy storage, improving both comfort and efficiency. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for water-bearing systems, Solutions for installation 

https://www.hoterway.com/de

Country: Germany
Founded: 2021
Sector: Energy + Heat + Water + Air
Stage: Pre-Seed
Innovation: Zenesis is a B2B SaaS solution for process-optimized planning of technical building equipment. The solution consists of individual modules, each tailored to a specific planning process (e.g., heating and cooling load calculations). Zenesis can automatically assess whether improvements should be incorporated into the planning or assist in evaluating alternatives to ensure the most cost-efficient and sustainable decision is made during the planning phase.
ISH Top Theme: Software solution planning
Top Solution Field: Software solutions

https://zenesis-planung.de/

Country: Germany
Founded: 2016
Sector: Air
Stage: Growth
Innovation: Innovation Vent specializes in advanced ventilation solutions for residential and commercial buildings. Their cutting-edge systems optimize air quality and energy efficiency through smart control technologies and sustainable design. The products are tailored to meet the highest industry standards and reduce environmental impact.
ISH Top Theme: Solutions for installation
Top Solution Field: Heating transition and climate protection

https://innovation-vent.co/en/

Country: Germany
Founded: 2020
Sector: Energy + Water + Heat + Air
Stage: Growth
Innovation: ScrapBees offers a digitized recycling service that supports trade businesses with on-site carrying aids and dismantling work for old or new systems. The innovation lies in the seamless integration of our services into the existing workflows of installers, increasing their efficiency and mitigating the shortage of skilled workers. ScrapBees accelerates the heating transition, optimizes access to recycled materials, and minimizes resource waste.

ISH Top Theme: Solutions for installation
Top Solution Field: Heating transition and climate protection

https://schrottbienen.de

Country: Germany 
Founded: 2023 
Sector: Heat, Energy 
Stage: Pre-seed 
Innovation: Gridty is developing an AI-powered energy consultant for businesses, providing rapid energy analysis and seamless integration of battery storage, heat pumps, charging infrastructure, and PV systems for commercial and industrial sites. The intelligent platform accelerates the energy transition by helping project developers and installers efficiently manage the diverse needs of commercial clients. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for heat generation, software solutions 

https://www.gridty.com

Country: Germany 
Founded: 2015 
Sector: Heat, Energy, Cooling 
Stage: Growth  
Innovation: Heizungsblut® is an innovative heat transfer fluid that enhances the efficiency of heating and cooling systems, reducing energy consumption and CO₂ emissions by up to 30%—without compromising comfort. Suitable for heating systems, district heating, solar thermal, and geothermal applications, this TÜV-certified technology lowers flow temperatures, cuts costs, and is eligible for BAFA funding of up to 40%. A simple step toward a more sustainable heat transition. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for heat generation, solutions for water-bearing systems 

https://www.heizungsblut.de

Country: Germany
Founded: 2019
Sector: Heat
Stage: Early
Innovation: ENEKA.Energieplanung provides the data foundation and digital tool for an efficient and accelerated local energy and heat transition. The necessary data is included with the tool, enabling immediate work commencement. This saves time and personnel resources. The use cases include: Heat Planning: Detailed representation of building-specific stock, demand, supply, and potential analyses. And Monitoring: Monitoring and balancing of CO₂ emissions and CO.
ISH Top Theme: Sales Software Solution
Top Solution Field: Software solutions

https://eneka.de/

Country: Germany 
Founded: 2020 
Sector: Energy 
Stage: Seed 
Innovation: gyde offers a mobile-first app that connects manufacturers and craft professionals to efficiently share knowledge and training. By leveraging AI-driven learning and support, gyde enhances onboarding, streamlines daily operations, and boosts on-site productivity. The platform enables manufacturers to provide targeted information while ensuring that technicians have quick access to crucial content—an essential advantage in an increasingly competitive industry facing a skilled labor shortage. 

ISH Top Theme: Software solutions 
Top Solution Field: Software solution sales 

https://www.gyde.io

Country: Lithuania
Founded: 2021
Sector: Water
Stage: Growth
Innovation: ARM TECHNOLOGY is a Lithuanian manufacturer specializing in innovative products that absorb water and water-based liquids to prevent or mitigate water-related damages. By utilizing advanced absorbent polymer technology, the products are lightweight, compact, and capable of absorbing large amounts of water, activating immediately upon contact. The production process is free from glue, binders, or latex, ensuring reliability and ease of use. The latest development, the “Smart Absorbent” kit, goes even further—providing real-time alerts about water issues while simultaneously beginning the absorption process. This groundbreaking solution offers an immediate response to unwanted water presence, making it a unique, market-leading innovation.

ISH Top Theme: Sustainable bathroom
Top Solution Field: Solutions for sanitary rooms, solutions for water-bearing systems, solutions for installation, solutions for intelligent building control

https://www.armtechnology.eu/de

Better Sol
Country: Germany
Founded: 2022
Sector: Energy
Stage: Early
Innovation: Better Sol is a clean-tech company based in Braunschweig. Our mission is to end resource waste in the solar industry. To achieve this, we test solar modules for reusability and distribute these 2nd-life modules to private and commercial customers. Through our automated and intelligent testing process, we can provide a performance forecast for the solar modules and fully utilize their potential.
ISH Top Theme: Solutions for installation
Top Solution Field: Energy efficiency and sustainability

https://better-sol.com

Country: Germany
Founded: 2021
Sector: Energy + Heat + Water + Air
Stage: Growth
Innovation: We offer an operating resources management system that enables companies to digitally manage and track their entire tool inventory. The innovation consists of several small features, such as the near-automation of tool registration using AI. Additionally, we are developing terminals to automate the tracking process.
ISH Top Theme: Software solutions
Top Solution Field: Software solution service

https://mycraftit.com

Country: Germany 
Founded: 2022 
Sector: Energy, Heat 
Stage: Seed 
Innovation: Sensaru has developed the first self-installable multisensor for heating systems in residential buildings. The Sensaru S1 enables precise, physical measurement of heating systems without requiring technical expertise. The collected data is analyzed and processed in the Sensaru Cloud, allowing centralized monitoring of all heating systems. Users can access real-time measurements, in-depth analyses, and comprehensive energy reports at the push of a button. By digitizing heating basements and providing validated data, Sensaru accelerates the energy transition in the heating sector. 

ISH Top Theme: Energy efficiency and sustainability
Top Solution Field: Solutions for intelligent building control, software solutions 

https://www.sensaru.com

Country: Netherlands 
Founded: 2024 
Sector: Heat, Energy, Software solutions 
Stage: Seed 
Innovation: Manuel is an AI-powered assistant designed for the installation industry, providing real-time access to technical data, including fault codes, manuals, and troubleshooting guidance. By centralizing knowledge in a single platform, Manuel helps technicians quickly find relevant information without requiring external support. The system is available 24/7 via web application and WhatsApp, ensuring continuous accessibility in the field. 

ISH Top Theme: Software solutions 
Top Solution Field: Solutions for installation, solutions for heat generation, software solutions, solutions for the manufacture of HVAC products 

https://manuel.chat

Country: Netherlands
Founded: 2016
Sector: Heat, Cooling, Energy
Stage: Early
Innovation: Blue Heart Energy is a deep-tech company that has developed a groundbreaking technology to drastically enhance heat pump performance. Using Thermo Acoustics, a technique that generates heat and cold through sound waves in a closed circuit, Blue Heart is now bringing this innovation to residential buildings for the first time. The technology eliminates the need for HFC-based refrigerants and produces zero CO₂ emissions. The ambition is to establish Thermo Acoustics as the new standard for heating and cooling, offering a safe and environmentally friendly alternative. This innovation has the potential to reduce 110 million tons of CO₂ emissions globally by 2050.

ISH Top Theme: Heat transition and climate protection
Top Solution Field: Solutions for heat generation, solutions for the manufacture of HVAC products

https://www.blueheartenergy.com

Country: Poland 
Founded: 2018 
Sector: Air, Energy 
Stage: Early 
Innovation: WizzDev specializes in IoT and embedded systems for smart buildings and HVAC solutions. By leveraging EnOcean, Matter, AWS IoT Core, and ESP32, we develop energy-efficient systems for building control, air quality monitoring, and predictive maintenance. Our innovation lies in seamless device interoperability, wireless energy harvesting, and scalable cloud platforms, enabling smarter, more sustainable HVAC management tailored to industry needs. 

ISH Top Theme: Software solutions 
Top Solution Field: Solutions for indoor air, solutions for intelligent building control, software solutions 

https://wizzdev.com

Country: Germany
Founded: 2018
Sector: Energy + Water + Heat + Air
Stage: Seed
Innovation: With OSRA by TillerStack, craftsmen and service technicians can optimize their daily workflows! The software for monocular smart glasses delivers critical information directly into the field of view and via audio—hands-free and efficient. Sketches, videos, checklists, and more can be accessed via voice commands, either AI-assisted or through quick access to standard databases like job data. Experts can provide live support via remote calls. Additionally, tasks can be documented, and video tutorials can be created.
ISH Top Theme: Software solutions
Top Solution Field: Softwarelösung Service

https://www.tillerstack.com/

Country: Germany 
Founded: 2024 
Sector: Heat, Energy 
Stage: Pre-seed 
Innovation: Ecalia is developing a highly efficient refrigeration cycle for heat pumps, utilizing energy recovery to reduce energy consumption by up to 20%. At the core of this innovation is a new type of compressor with an integrated expansion device, which, through a unique material combination, also lowers production costs by 25%. This breakthrough significantly enhances the efficiency of heat pumps and contributes to a more sustainable energy transition. 

ISH Top Theme: Solutions for heat generation 
Top Solution Field: Energy efficiency and sustainability 

https://www.ecalia.de/unsere-loesung/

Country: Germany 
Founded: 2019 
Sector: Energy + Heat + Air 
Stage: Early 
Innovation: The choice of sustainable building services systems significantly impacts a building’s environmental footprint and energy efficiency, making it a key component of sustainable construction for architects and planners. However, creating Environmental Product Declarations (EPDs) is complex, time-consuming, and costly for building services manufacturers. NextBT, an end-to-end platform, offers innovative data and AI solutions to optimize LCA processes for building services products, enabling the swift and efficient creation and management of EPDs. 
ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for the manufacture of HVAC products 

https://terranext.io

Country: Belgium
Founded: 2022
Focus: Software solutions for route and workforce planning
Stage: Growth
Innovation: Movetex provides intelligent software to automate and optimize complex planning tasks. For companies with mobile workforces, Movetex Services enables efficient appointment scheduling, cuts planning time by up to 80%, and increases both productivity and customer satisfaction. In the last-mile sector, Movetex Deliveries offers route planning software that generates up to 30% more efficient routes, ensures on-time deliveries, and supports drivers with a mobile app.
ISH Key Topic: Energy efficiency and sustainability
Top Solution Area: Smart building control solutions, software solutions

Website: https://www.movetex.com

Country: Germany 
Founded: 2017 
Sector: Energy 
Stage: Early 
Innovation: powerfox makes energy data (electricity, water, heat) digitally accessible, laying the foundation for new business models. The company offers smart self-installable hardware for various meter types, a high-performance data platform, and intelligent services for private customers, the energy sector, and real estate industry. With nearly 25,000 end customers and a growing ecosystem of platform partners, resellers, and commercial customers, powerfox is driving digital energy management. The solution connects electricity, gas, heat pumps, PV, and e-mobility into a seamless energy management system. 

ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Software solution 

https://www.powerfox.energy

Country: Belgium 
Founded: 2022 
Sector: Heat + Water + Air 
Stage: Early 
Innovation: Allorado develops a gateway that establishes private wireless networks for smart building control. Its low-power network (LoRa) enables retrofitting of existing buildings with battery-powered sensors and actuators, eliminating the need for cabling. Allorado manages all communication, integrating innovative LoRa technology with existing building systems such as BACnet, Modbus, and KNX. An example is retrofitting thermostatic radiator valves in protected buildings. 
ISH Top Theme: Energy efficiency and sustainability 
Top Solution Field: Solutions for intelligent building control 

https://allorado.io/gateway