Spare-it is a green tech innovation startup founded in 2018 in Boston by Laurent Canneva and Laurent Meunier. Revolving around an employee-centric digital platform, Spare-it collects and analyses real-time data on waste generation and recycling practices. By leveraging advanced analytics, Spare-it provides diverse recommendations to help businesses achieve their waste reduction goals. The intelligence platform goes beyond traditional methods by incorporating interactive and gamified elements to foster employee engagement, heighten their awareness of waste reduction, and progressively cultivate sustainability mindset and culture change.

HM Environmental Technologies Limited was founded by Jerry Kong in 2016. The mission of the company is to reduce waste, promote recycling and upcycling of wood waste, and eventually reduce the destruction of natural habitats. Through projects making use of green innovative technologies and smart construction materials solutions, HM hopes to educate the public and gradually build a green culture locally. The company offers a variety of products and services, from recycling used wood, upcycling wood into hoardings, multi-purpose wood boards and smart hoarding systems, to rental service of hoardings for shopping malls and outdoor shopfronts. They also partner with government departments, property developers, shopping malls and construction sites.

Cornerstone is the brand founded in 2016 by Lawson Lau. He owns three companies specialising in different business focuses, namely EV-charging solution provider Cornerstone EV Charging Service (Cornerstone Technologies), energy management and second life EV battery energy storage system service provider Cornerstone Energy, and multiple stream smart recycling solution provider Cornerstone Smart Recycling. The brand strives to offer cutting-edge research and development (R&D), solutions and services as a whole in charging systems, recovery of traction battery used in EV, and smart recycling platform, making them more accessible to users in Hong Kong, as well as the clienteles around Southeast Asia who practically cope with the tide of sustainability transformation, engaging stakeholders and the public in building a greener future.

The Carbon Lite System (CLS) Environmental Technologies is founded in 2020 by Pirry Leung and Dr Oliver Yeung. The environmental tech startup specialises in equipping their clients with technology application in waste management and circular economy solutions. Through research & development of engineered biochar, a durable and VOC-absorbing material created from wood waste and food waste by carbon sequestration, which could be used to make concrete greener by incorporating biochar as a partial replacement for cement in the mixture. The company focuses on developing greener building materials, including plaster, bricks, etc., by utilising biochar and reducing the reliance on cement.

Founded in 2020 by former investment banker Palak Shah Setunga (known as Polly), Conscious Paper is a sustainable handmade paper brand dedicated to fostering sustainable living so that our future generations can enjoy the planet as we have. Through ever-evolving sustainable and customised solutions in the form of stationery and packaging, the brand hopes to strategically influence the United Nations Sustainable Development Goals (UNSDGs), including Goal 1: No Poverty; Goal 2: Zero Hunger; Goal 8: Decent Work and Economic Growth; Goal 10: Decent Work and Economic Growth; Goal 12: Responsible Consumption and Production; Goal 13: Climate Action; Goal 15: Life on Land; Goal 17: Partnerships for the Goals. Currently serving the Hong Kong market, the company pursues opportunities to solve societal and environmental challenges through business innovation and collaboration.

Founded in 2019, Negawatt Utility Limited (Negawatt) combines big data, Internet of Things (IoT) and artificial intelligence (AI) to offer custom-made, innovative engineering and cloud-based solutions. The company's software, hardware and consultancy services help its clients to achieve sustainability management in buildings and co-create smart cities. Negawatt boasts an impressive client list from a wide range of industries and sectors, from real estate developers, property management companies, government departments, architecture firms, NGOs, data centres, consultancy companies to contractors. The startup strives to co-build with its partners sustainable, smart city while focusing on three Sustainable Development Goals: SDG 3 "Good Health and Well-being", SDG 9 "Industry, Innovation and Infrastructure", and SDG 11 "Sustainable Cities and Communities".