Top Greentech startups this Net Zero Week

As the world moves towards a more sustainable future, the drive for net zero emissions has become a crucial objective for businesses and governments alike. In celebration of Net Zero Week, it’s an great opportunity to spotlight the innovative startups leading the charge in this green revolution.

These companies are leveraging cutting-edge technologies and creative solutions to address the pressing issue of climate change. They are not only reducing their own carbon footprints but also providing scalable solutions that help other businesses and individuals achieve net zero emissions. In this article, we highlight the most promising net zero startups making significant strides in sustainability, showcasing how they are transforming industries and paving the way for a greener tomorrow.

BioEnergy Solutions

BioEnergy Solutions is a startup dedicated to creating sustainable and eco-conscious approaches for waste management and energy generation. The firm engineers waste-to-energy systems that transform organic waste into renewable energy through anaerobic digestion and biogas production. By implementing these systems, the company not only reduces greenhouse gas emissions but also bolsters smart grids, providing electricity, biogas, and thermal heat for industrial purposes.

Electro-Active Technologies

Electro-Active Technologies is a startup focused on transforming organic waste into renewable hydrogen gas, addressing both waste management and clean energy production. The company utilises advanced biorefinery technologies developed at the Department of Energy's Oak Ridge National Laboratory. By integrating biology and electrochemistry, these technologies break down organic waste, such as food scraps and plant biomass, to generate hydrogen.

Electro-Active Technologies has designed a modular system that can be deployed onsite or in a decentralised manner, offering a flexible solution for urban settings. The system converts the liquid portion of food waste into hydrogen, while the remaining solids can be composted, used as animal feed, or processed into soil products.

Energy Dome

Energy Dome, an Italian startup, is transforming the energy storage industry with its CO2 Battery technology. This approach offers a unique solution for long-duration energy storage by utilising carbon dioxide as the storage medium.

The CO2 Battery functions by cycling CO2 between its gaseous and liquid states to store and release energy. During times of low energy demand, surplus renewable energy compresses CO2 into a liquid, effectively storing the energy. When energy demand surges, the liquid CO2 is converted back into gas and expanded to drive a turbine, generating electricity. This technique provides a cost-effective, efficient solution for energy storage and avoids the need for rare earth materials such as lithium and cobalt, promoting sustainability and geopolitical independence.


Heatio is a Liverpool-based startup aiming to transform home energy management with its Heatio Flexx platform. This solution functions as both a Home Energy Management System (HEMS) and a Virtual Power Plant (VPP), optimising and managing renewable technologies within homes to benefit consumers and the national grid.

Heatio Flexx leverages advanced AI and machine learning, combined with in-home data, to give users detailed insights into their energy consumption and offers personalised recommendations for enhancing energy efficiency. The system integrates various renewable technologies, such as solar PV, heat pumps, and battery storage, to maximise energy savings. Additionally, it allows homeowners to sell excess energy back to the grid during peak demand periods, providing an innovative and sustainable approach to home energy management.

Materials Nexus

Materials Nexus, a UK-based startup, is aiming to revolutionise the development of sustainable materials by harnessing the power of AI and quantum mechanics. The company aims to reshape the materials science landscape by significantly cutting down the time and expense involved in discovering and developing new materials.

The company has created proprietary datasets and machine learning algorithms capable of predicting the properties of new material compositions. This technology enables the rapid identification and development of high-performance, sustainable materials, circumventing the traditional, time-consuming, and costly experimental methods. This is vital for advancing technologies in renewable energy, energy storage, and electric transportation, as it reduces dependency on environmentally harmful rare-earth elements and precious metals.


Sunfire, a startup based in Dresden, specialises in developing and manufacturing industrial electrolysers essential for producing renewable hydrogen and syngas. Founded in 2010, Sunfire has emerged as a prominent figure in the hydrogen production sector, employing cutting-edge electrolysis technologies, including high-temperature solid oxide electrolysers (SOEC) and pressurised alkaline electrolysers.

Sunfire's technology enables the decarbonisation of energy-intensive industries by generating green hydrogen and syngas from renewable electricity, water, and captured CO2. This innovation allows for the replacement of fossil fuels with climate-neutral alternatives in applications such as steel production and aviation. The company's electrolysers are designed for scalability and efficiency, making them suitable for large-scale projects.

Creating a net zero future

The startups featured in this article are at the forefront of the global push towards sustainability. These innovative companies are leveraging cutting-edge technologies and creative solutions to address climate change, reduce carbon emissions, and promote renewable energy sources.

From waste-to-energy systems and advanced material development to smart home energy management and green hydrogen production, these startups are not only transforming their respective industries but also setting new standards for environmental responsibility. As they continue to grow and scale their operations, their impact on achieving net zero emissions will be significant, driving us closer to a sustainable and greener future.