Circular Accelerator

Discover the solutions by sector

Thanks to the previous editions of the Built Environment ClimAccelerator, 24 start-ups have been accelerated to foster the net-zero transition.



Concular is a circular construction startup using intelligent data-based material matching between deconstruction and new construction projects, life cycle assessment, and a comprehensive process for architecture offices, project developers, construction companies and manufacturers.

2050 Materials

2050 Materials is a platform for architects to design circular and low-carbon buildings, and then source building materials accordingly.


Concrete4Change is developing a technology capable of sequestering significant amounts of CO2 into concrete and reducing the CO2 emissions of concrete up to 60%. Enabling construction and concrete industry to transition from CO2 emitters to CO2 sinks.

Easy Housing

Easy Housing provides a circular and biobased building concept that is climate resilient and scalable across markets.
The buildings are zero carbon, can withstand extreme weather events like floods and hurricanes and are designed in timber to reduce up to 250% of CO2 emissions compared to concrete homes.


The Flinker App offers the first software ecosystem for real-time planning of sustainable construction projects. The start-up’s mission is to reinvent construction by making it controllable and sustainable enabling optimal collaboration between project stakeholders through smooth data flows.


Terratonics is a concrete free foundation system that allows manufacturers to replace concrete in foundations and subfloors with timber and light gauge steel frames and structural insulated panels while providing a modular division that designs, builds and installs eco-friendly buildings.

Arcology system LTD

Arcology System is a smart, data-driven, modular, adaptable interior construction system that unlocks circular economy value within commercial interior spaces for REIT’s, Developers and End-users quickly, more cost effectively with zero waste.


Using AI models and data, ConcAI reduces next mix development from 2 years and 200k project to 3 months and 20k.

Aeternum LTD

Aeternum develops reusable and re-adaptable buildings as carbon-neutral products for real estate owners and investors. The future-proof circular buildings are based on a standardized, sustainably manufactured kit of components, maintain value over life cycles and ensure end-of-life value recapturing.

Orosi AI

Orosi AI is a software that generates collision-free, completely norm-conform, and material-efficient MEP design suggestions in minutes instead of weeks for every trade.
The planner suggests the most suitable options for the project and is able to quickly adapt the design to new emerging circumstances.

Renewable energy and efficiency

Zenit Solar

Zenit Solar is the digital platform for solar communities.
The Zenit model makes it possible to consume renewable energy generated on the roofs of close neighborhoods, supporting the energy transition with zero impact on the environment: a model that maximizes sustainability while saving on electricity bills.

GS Renewable

GS Renewable builds modular heat pump plant rooms to provide clean heating, cooling and hot water for new and retrofit stakeholders in all sectors.
An established renewable energy company committed to providing renewable energy to businesses while helping them reduce energy costs and their carbon footprint.


CoBenefit is an end-to-end software that supports local initiators launching initiatives with qualified execution partners in a a win-win strategy that aims at merging individual benefits and climate protection. The software also helps authorities identifying climate action schemes and coordinating key actors.

Solight LTD

Solight LTD is an innovative, efficient, and affordable static solar lighting system.
The system collects sunlight throughout the day and supplies natural sunlight indoor, saving energy, reducing carbon emissions and air conditioning costs, and creating healthy living spaces.


Preflet is a SaaS platform that reduces carbon footprint cutting time to action and time to market by 90% featuring Mobile & cloud access 24/7 and eProactive AI Model. The product creates impactful AI solutions for SMEs, NGOs, healthcare, banking, smart factories and smart cities.


LightMirror is an architectural startup which brings sunlight to healthcare buildings and reduces their energy needs. The system redirects daylight towards the openings of a building to increase their solar thermal gain and thus reduce the building’s heating consumption without motorization nor electricity.


SunCrafter builds and operates smart infrastructure networks for the charging and parking of micro emobility vehicles in urban and regional areas. Stations are grid-independent and powered by (2nd life) solar panels, allowing rapid establishment of agile infrastructure networks, exactly where they are needed.

Hub Controls

Hub Controls‘ automated energy reduction technology saves 36.63% on residential energy use for space heating and cooling.


ReLi batteries focuses on giving a new life to electric vehicle batteries, innovating every step of it while reducing batteries’s waste and empowering consumers to take control of their energy. Their innovative technology makes these batteries smarter in order to increase sustainability and savings.


Enerlind is a patented product that enables apartments to produce and store electricity with no space impact.
Through disruptive solar blinds, Enerlind can provide builders and citizens a tool for achieving high energy and cost-effective buildings and fostering the transition to the net-zero.

Construction & Materials

UP Catalyst

UP Catalyst is a start-up developing, testing and perfecting the method to produce high quality sustainable carbon nano-materials and graphite from industrial CO₂ emissions through a process powered by either wind, solar or hydro energy resulting in a carbon negative production line.


4OMID creates portable systems to produce circular bio-composite bricks & blocks
helping construction companies to reduce their time, costs, and environmental footprint by building lightweight, efficient, and versatile structures.
The products are conceived to be later reused and repurposed.


Silicate is a climate solutions company leveraging the power of geochemistry to permanently remove carbon dioxide from the atmosphere.
By speeding up a natural geological process, the weathering of silicate minerals, Silicate is removing excess CO2 from the atmosphere, and storing it over geological timescales.


ParaStruct is developing 3D printing technology to make the construction industry more sustainable, circular and CO2 neutral.


EcoMN is disrupting manganese production and making it eco-friendly & CO2 free.