Seaborg is developing a nuclear reactor technology fundamentally different from what exists today. We are making nuclear an inexpensive, sustainable and safe technology that can out-compete fossil fuels and revolutionise energy markets. We are designing our Compact Molten Salt Reactor to be one of the most sustainable sources of energy in the world. From being a start-up in a basement Seaborg is today employing more than 20 people and scaling fast.

We are a startup in the early stage that is developing a platform of vehicle-recyclingOur goal is to recycle the vehicles that are in disuse and put them available to anyone who needs one. This is for the purpose of contributing to the creation of smart cities, as well as to protect the environment since our philosophy is based on the Sustainable Development Goals.We are currently in a stage of fundraising and we are also looking for the right team to make our mission a reality. We are a startup with an office in Nykobing Falster, but we believe that you can work from anywhere, whether you are in Copenhagen, Aarhus, or traveling.We are motivated to know that we are doing something that will change the world to improve it since we believe that nobody needs to buy a new vehicle, but rather, recycle it.We are currently looking for great humans who want to accompany us on this trip and who want to join the team. Designers UX/UI and Programmers. If you think you should be part of something big that changes the world, then contact us.

We design and manufacture single speed and electric cargo bicycles. We are developing a solution for last mile delivery using electric cargo bicycles. We are working towards quieter, cleaner,and  more livable communities. We have a Nørrebro showroom selling both bikes and biodynamic/organic food and drink.  We are a small team passionate about improving everyday community life with bicycles. We are based in Copenhagen and London.

Regnell Works helps start ups and established companies identify opportunities within sustainable business models.  The UN Sustainable Development Goals represent a very large business opportunity for all of us if we are to realize a planet in balance by 2030. Regnell Works has significant experience in a national and international business context. Making a positive difference is possible for everyone - making money, while you do it, requires expertise. We are passionate about making a difference in the world. Sometimes that means working our behinds off - however we also want to be a positive influence on those that are close to our heart - so we make sure to enjoy the ride and take time off to smell the flowers, exercise and enjoy life.

What problems would you love to solve? What are your goals in life? What, like really, do you enjoy working on? If you could change the world what would you do? How would you like your kids to remember you?...And how can we help you accomplish that?KICKASS capital invest in extraordinary entrepreneurs with unique technologies that will define the next era of innovation. Sounds good? Send us your pitch!  hello@kickass.capital

We`ve been organising Startup Weekends in Copenhagen for 4 years, educating and inspiring hundreds of people to become entrepreneurs. We were lucky to see it from the first row how #CPHSW helped people get into the entrepreneur mindset and to try new challenges. We always believed that one of strongest forces were the network of people you created during those crazy weekends. This is why we created Startup Weekend Mega: The biggest Startup Weekend ever organised in Europe.  We´re an awesome group of volunteers coming from a wide variety of backgrounds. All of us have their own stories about how we ended up joining the #CPHSW family.  We are proud that we`re 100% voluntarily run organisation and that we created a culture where everybody feels safe to experiment and make their own decisions. And we`re always there to support each other outside Startup Weekends.  We think being part of the organiser family is an excellent opportunity to try out craziest ideas in your field. A playground where we can have a lot of fun and learn a ton. After years of experimentation now we`re organising our biggest event, Startup Weekend Mega, and we would like to involve new people on this journey. If this makes you excited then please feel free to reach out copenhagen@startupweekend.org  or directly at the job posts. Fun guaranteed!;)

Put an End to the Stench!With Peefence, it is easier than ever to provide great sanitation everywhere at outdoor event sites. Through an engaging experience, you let your audience contribute to better & healthier surroundings, creating incentive for customers to return year after year.While solving a major infrastructural problem, Peefence provides a completely platform for outdoor advertisement & sponsoring, by using the large graphics area on the eco-friendly Peefence urinal.

At zeal, we partner with businesses seeking to build profitable and sustainable business models, without compromising people, passion or planet. We are a small team of advisors working from home, the office, co-working spaces - when and where ever. We are dedicated to building healthy and thriving businesses for the greater good. We are passionate about sharing our findings and models in order to help everyone change the future of work for the better. We work with a win-win mindset of inclusion, collaboration, knowledge-sharing and generosity, and we expect the same from the people we work with.

We are HEMBOO: an early stage start-up with the vision of making low emissions, renewable materials the norm in construction. Besides fossil fuels, the production of concrete is the worst emitter of CO2 in the world. However it is the most used material within the construction sector. But not for long: climate legislation is about to make concrete a whole lot more expensive, by introducing a CO2 TAX. This leaves the construction companies with a problem as there is no valid sustainable alternative they can use. HEMBOO offers an easy solution: prefabricated walls for new construction made of hemp and bamboo with a reduction of 80% CO2 emitted compared to the traditionally used concrete walls. BUT the construction industry is very conservative and risk-averse. Therefore getting to market is a long journey. We built our first prototype are now preparing for the second one and are gathering data on the needs of our customers. Our aim is to provide a solution similar enough in prefabrication and installation methods, to make the transition from concrete fast and easy. Our element is designed for large scaled production so that we can have the largest impact. Recently we have received a total of 520.000 dkk in soft funding for product development and are participating in multiple startup support programs so it is full speed ahead! The team behind it all: We are a diverse team of three, Elsa Maria Iuliano, Helena Brandt Rejndrup and Michael Hallam. Helena and Elsa graduated as architectural engineers from DTU while Michael is finishing up his studies in design and entrepreneurship. We started HEMBOO because we are all very passionate about making an environmental impact. As a team we have a lot fun together, while still being productive. We emphasize a friendly environment where we help each other even though everyone has individual responsibilities. Currently looking to expand and we want you to be a part of it! Reach out if you are interested in getting on board. We are particularly interested in commercial, communication and financial competencies. Based in our joint office spaces in the center of Copenhagen and at CBS in Frederiksberg. And yes they do they do have Friday bars :-) Feel free to contact us with any questions! E-mail: info@hemboo.dk

Kiteborne Energy ApS makes IOT sensors for private sailboats, B2C. We have developed a family of sensors and now we must kick off sales and scale up. We look for a super creative marketing genius for general advertise and sales strategy. Geniuses with a flair for IOT are welcome to contact us aswell :)

The Impactful is a curated community and platform helping purpose-driven individuals and organizations thrive in the Anthropocene. We connect creative freelancers with aligned work, support businesses leading systems change with talent and skills development, and design programs that center sustainability, storytelling, and impact.

We are building large-scale robots with computer vision to sort all waste in extremely high purity. You can read more about our mission, a detailed description of the current situation, and our plan for how Easysort works on our website: https://easysort.org/. You are right for the team if you are passionate about building robots and/or their AI controls. Our main focus is keeping the team small. Easysort is not profitable yet. We expect to be able to pay you before the end of 2025, but all positions are unpaid and current equity-based. We expect everyone to be on-site all the time when working with Easysort.

Steamgreen er en Dansk Greentech virksomhed i Ballerup, fokuseret på at levere grønne løsninger til bilvask-industrien. Vi passer på miljøet og bruger kun 3l. vand Vores dampmetode sparer på vandforbruget. En liter vand forvandles til 1.700 liter tørdamp. En dampvask af din bil udgøres reelt set kun af tre liter vand – i modsætning til en traditionel bilvask hvor der anvendes overr 100 liter vand. Når der anvendes tørdamp, rengøres bilen vigtigst af alt helt uden brug af vaskekemikalier. Hensynet til miljøet er nemlig Steamgreen’ absolutte metier, og det er vi rigtig stolt over. + Kun 3-5 l. vand pr. bilvask modsat traditionel bilvask, hvor der bruges over 100 l. vand. Den ultimative bakteriebekæmper Vi dræber ca. 95% af bilens bakterier Steamgreen’ metode til dampvask dræber mere end 95 procent af bakterierne i din bil. Du bliver med sikkerhed beriget med følelsen af en ny bil, som også er ren og bakteriefri for dine børns sundhed og dit helbreds skyld. Metoden er også effektiv, fordi den 170 grader varme damp trænger ned i alle afkroge af bilen, hvor den fjerner snavs og dræber bakterierne i rattet, vinduer, instrumentbræt, døre, falser, måtter og paneler. + 95% af bakterierne i bilen dræbes ved dampvask

WHAT WE DO ALGIECEL is a BioSolutions company on a mission to deliver sustainable, high-quality ingredients at scale – meeting the growing global demand without pressuring our planet’s ecosystem. Harnessing nature’s own way and putting it to use at industrial scale, we grow microalgae using light and CO2 in modular photobioreactors. Our microalgae-based ingredients are rich in protein, omega-3 and bioactives. We are building a reliable, scalable source of marine nutrients for food, feed and cosmetic markets – without exploiting nature. WHY WE DO IT With the way we feed to world today, we are overexploiting planetary boundaries. There is a critical need for reliable partners who can translate innovation into industrial capacity for sustainable ingredients at scale. ALGIECEL exists to provide an alternative with low CO2, water and land use, to customers that want to decarbonize their value chain. WHAT MAKES US DIFFERENT 1.Ingredient Value: We offer premium-quality, microalgae-based ingredients with consistent functionality and full traceability—designed to meet the rigorous standards of modern supply chains. 2. Sustainability: Our production process minimizes CO₂ emissions, water use, and land footprint—replacing resource-intensive ingredients like fish oil and fish meal.. 3. Modular System: Our compact, modular photobioreactor system enables low-risk, flexible scaling with strong unit economics—making sustainable growth achievable, one module at a time.

Klimascore er den nye danske standardparameter for klimavenlige hoteller. Igennem de sidste 4 år har vi arbejdet sammen med ledende hoteller i Danmark, samt afholdt en årlig kåring, Climate Award, for at finde Danmarks mest klimavenlige hotel. Klimascore er baseret på hotellernes egne data og direkte udledning. I nær dialog med hotelledelsen og nøgleansatte hjælper vi herefter hotellerne med at blive mere klimavenlige samtidigt med at de driver deres forretning fremad, både ift. at opnå besparelser, men også i forhold til branding, medarbejdertilfredshed m.m.