Hamburg, Germany · Startup1KOMMA5° (named for the 1.5°C climate target) is one of Europe’s fastest-scaling energy transition companies, reaching unicorn status in roughly 21 months. Based in Hamburg, the firm tackles the “last mile” of decarbonization by combining a roll-up acquisition strategy with a software-defined energy platform. Instead of only selling solar panels, 1KOMMA5° acquires local installer businesses across Europe and digitizes them to deliver end-to-end home electrification — solar, batteries, heat pumps, and EV chargers — with consistent quality and financing. The company’s differentiator is Heartbeat, a proprietary energy management system that turns these assets into a virtual power plant. Heartbeat orchestrates when batteries charge or discharge based on real-time spot prices and grid conditions, allowing households to capture savings from dynamic tariffs and to export power during peak demand. In 2025, the system expanded to automated trading of household energy, making “free” electricity periods during windy or sunny hours a tangible consumer benefit. This blending of hardware deployment and energy-software automation allows 1KOMMA5° to capture margin both on installation and on recurring software and energy services. Founder Philipp Schroder (former Tesla country director and Sonnen executive) used his industry network to skip early accelerators, and the company instead embedded itself in the Hamburg Startup City ecosystem. Its acquisition engine is relentless: by buying regional market leaders, it locks in the most scarce resource in the sector — skilled installers — while rapidly expanding geographic reach. By early 2026, 1KOMMA5° had expanded beyond DACH into the Nordics, Spain, and Australia, positioning itself for a cross-continental footprint ahead of a public listing. The company has signaled an IPO-readiness push, backed by record turnover reported for 2024 and an expansion into branded hardware components to increase margin and supply-chain resilience. Its investor base blends strategic and growth capital: Porsche Ventures provided early backing, G2VP brought Silicon Valley cleantech expertise, Eurazeo and eCapital added European growth capital, and Norrsken VC underscored the impact thesis. In 2026, 1KOMMA5° is a case study in how Europe can scale climate tech through operational execution rather than pure technology — a disciplined roll-up with a software heart that turns millions of households into coordinated energy assets.
StartupGrowthCleanTechEnergyIoT
Bratislava, Slovakia · StartupAgeVolt offers a digital ecosystem for EV charging that integrates with building energy management to prevent overloads and blackouts. Its platform optimizes charging schedules, manages access, and supports payments across fleets and commercial properties. The company is building a network model described as a “booking.com for private chargers,” unlocking underused charging infrastructure. By 2026, AgeVolt is a notable Slovak player in smart charging.
StartupGrowthEV ChargingEnergySoftware
Nantes, France · EventSpecialized bioeconomy and bioenergy event covering biomass, waste-to-energy, and carbon capture. Price: free for verified professionals or about EUR 50-100. Includes startup pitches and B2B matchmaking for industrial pilots.
EventEventsClimate TechEnergy
Gothenburg, Sweden · Venture StudioEstablished 2015 (building on earlier university incubation). Venture builder and fund for tech startups from Chalmers University using an Encubation model; provides pre-seed funding, business coaches, and lab access. Notable spin-offs include Minesto and KomboSat. Scope: Regional (West Sweden).
Venture StudioDeep TechUniversityEnergy
Essen, Germany · EventEurope's defining energy industry fair with Smart Energy and innovation sectors. Price: about EUR 75 day ticket or EUR 225 for 3-day pass. Great for renewable energy, smart metering, and grid intelligence startups.
EventEventsEnergyClimate Tech
Essen, Germany · AcceleratorLaunched 2013. Energy and cleantech accelerator with a 3-month program, up to EUR 22,000 funding, coaching, and access to E.ON's network. Support: seed funding, mentorship, utility industry access. Scope: National.
AcceleratorEnergyCleanTech
Berlin, Germany · EventClimate-tech and green economy matchmaking event at Flussbad Campus (Reethaus), focused on AI-accelerated decarbonization across energy, sustainable buildings, green mobility, and deep tech. Startup Pitch tickets are typically around EUR 600 + VAT and include a guaranteed short on-stage founder pitch in front of active climate investors.
EventEventsClimate TechEnergyGreen MobilityDeep Tech
Lisbon, Portugal · AcceleratorVC arm of utility EDP investing in energy technology, cleantech, and electric mobility.
AcceleratorSeries A to Series BEnergyCleanTechMobility
Eindhoven, Netherlands · AcceleratorEstablished 2010. EU-backed accelerator and investor driving sustainable energy transition with funding, IP support, and industry partnerships; 248 investments and 8 exits, including early backing of Northvolt. Scope: International (EU).
AcceleratorEnergyCleanTechSustainability
Nuremberg, Germany · EventWindows, doors, and facades trade fair with an Architecture & Technology forum. Price: about EUR 30-50. Good for smart glass and energy-efficiency hardware startups.
EventEventsConstruction TechEnergy
Amsterdam, Netherlands · EventSenior-level utility summit focused on net-zero transition. Price: about EUR 1800-2500. Great for grid tech, smart metering, and energy analytics startups.
EventEventsEnergyClimate Tech
Lisbon, Portugal · AcceleratorLaunched 2017. Corporate venture program connecting startups with the Jose de Mello Group in healthcare, energy, and infrastructure. Support: pilot agreements, corporate guidance, and potential customer contracts. Scope: National.
AcceleratorHealthcareEnergyInfrastructure
Reykjavik, Iceland · EventCity-wide innovation festival across Reykjavik with 1,500+ attendees and a strong climate and impact focus. Includes climate-pitch formats like Ok, Bye and intimate networking across decentralized venues.
EventEventsClimate TechEnergyOcean TechFoodTechSustainability
Bratislava, Slovakia · StartupInoBat builds custom-designed batteries for demanding applications such as aviation, premium EVs, and performance mobility. Unlike standard gigafactory players, InoBat focuses on tailored R&D, pilot production, and high-value customers that require specialized chemistry and form factors. By 2026, the company is a strategic player in the EU battery value chain with backing from partners like Rio Tinto and Gotion High-Tech, positioning Slovakia as a serious contributor to Europe’s energy storage ecosystem.
StartupGrowthEnergyBatteriesManufacturing
Stockholm, Sweden · StartupNorthvolt is a Swedish battery manufacturer founded to build a European supply of sustainable lithium-ion cells. In November 2024, Northvolt AB filed for Chapter 11 protection in the United States to pursue a financial restructuring while seeking strategic solutions for Northvolt North America. On March 12, 2025, the company filed for bankruptcy in Sweden and a trustee was appointed to oversee the process. Northvolt remains a landmark industrial project for Europe’s battery ambitions, but its current status is restructuring and insolvency rather than a typical growth-stage startup.
StartupIndustrial Scale-upClimateIndustrialEnergy
Rotterdam, Netherlands · AcceleratorFounded 2015. World's first port and maritime industry accelerator based in Rotterdam (now also Antwerp and Singapore). Three-month program with 100+ mentors and a Shakedown demo day; alumni include We4Sea and CargoLedger. Scope: International.
AcceleratorMaritimeLogisticsEnergy
Munich, Germany · StartupProxima Fusion is a deep-tech fusion energy company spun out from the Max Planck Institute for Plasma Physics in 2023. It is developing quasi-isodynamic stellarator systems designed for stable, commercial fusion power generation and is targeting a demonstrator pathway toward net-energy performance in the next decade.
StartupGrowthDeep TechCleanTechEnergyClimate Tech
Amsterdam, Netherlands · AcceleratorAmsterdam-founded accelerator and seed investor with domain-specific programs in energy, agrifood, and emerging tech. Spring 2026 application windows are opening in March with track-specific deadlines. Model combines acceleration, initial capital, and potential follow-on funding for scaling teams.
AcceleratorEnergyAgriFoodEmerging Tech
Amsterdam, Netherlands · AcceleratorSpring 2026 application windows for Rockstart domain programs (including energy, agrifood, and emerging tech) with initial investment and follow-on funding pathways. Programs are opening through March 2026 with track-specific deadlines.
AcceleratorEnergyAgriFoodEmerging TechPre-SeedSeed
Bratislava, Slovakia · StartupSeak Energy develops smart infrastructure systems that control street lighting and EV chargers over existing power lines, avoiding costly new cabling. This retrofitting approach allows cities to digitize “dumb” infrastructure quickly and affordably. By 2026, Seak Energy is expanding across municipalities seeking low-cost modernization of public assets.
StartupGrowthSmart LightingSmart CityEnergy
Amsterdam, Netherlands · AcceleratorFounded 2007. Investor in smart energy transition and climate tech.
AcceleratorSeries AEnergyClimate TechMobility
Barcelona, Spain · AcceleratorFounded 2013. Impact accelerator and investment fund for social enterprises in health, cleantech, and energy. Runs acceleration programs and an impact fund; has accelerated 50+ startups. Support: mentoring, CSR partners, impact investment up to EUR 400K. Scope: National.
AcceleratorImpactHealthCleanTechEnergy
Munich, Germany · AcceleratorThe Siemens Technology Accelerator (STA) is a unique corporate accelerator program run by Siemens AG since 2001, aimed at spinning out non-core technologies from Siemens’ R&D into independent startups. Based in Munich, STA essentially identifies promising internal innovations (often developed at Siemens Corporate Technology labs) that don’t fit Siemens’ core business, and forms new ventures around them. STA provides seed funding, co-founding management, and access to Siemens’ infrastructure to these ventures, effectively acting as a venture builder. Over its history, the Siemens Technology Accelerator has spun out more than 12 companies across sectors like energy, industrial automation, healthcare, and materials. Notable spin-offs include MetisMotion (advanced actuators), Magazino (warehouse robotics – which STA helped early on), and Epiqo (a digital twin software). One high-profile case is Rethink Robotics GmbH: in 2020, STA helped relaunch assets of Rethink Robotics (the US cobot pioneer) in a joint venture, integrating it with Siemens technology. The typical STA project starts with identifying a tech with market potential. STA then recruits external entrepreneurs or Siemens intrapreneurs to lead the startup, develops a business plan, secures intellectual property rights (license or assign IP from Siemens to the newco), and provides initial funding (often low millions of euros). Siemens often remains a minority shareholder and provides pilot customers or manufacturing help. The time from project inception to an independent company launch is around 18–24 months. STA’s model addresses a common big-corporate problem: great inventions that don’t make it to market. By essentially incubating startups from within, Siemens both creates value from dormant IP and fosters innovation culture. Many STA spin-outs go on to raise venture capital or get acquired. For example, Ionity (an EV charging network) was seeded by Siemens’ STA and later became a major joint venture with automakers. The Siemens Technology Accelerator operates with a small specialized team and has won awards for corporate venturing. It serves as a best-practice example of how large industrial firms can proactively spin off new ventures rather than let R&D sit on a shelf. In essence, STA extends Siemens’ innovation beyond its core by unleashing startups that bring cutting-edge tech (like novel sensors, new materials, etc.) to the broader market.
AcceleratorEnergyIndustrialHealthcare
Leipzig, Germany · AcceleratorFounded 2014. Six-month program for entrepreneurial teams with coworking, mentoring, and technology partners; alumni include energy and healthcare startups. Support: mentorship, workspace, partner resources. Scope: Regional (East Germany).
AcceleratorGeneral TechEnergyHealthcare
Stockholm, Sweden · StartupStegra (formerly H2 Green Steel) is one of Europe’s most ambitious industrial decarbonization projects, aiming to rebuild steelmaking around renewable energy and green hydrogen. The company is building a fully integrated production campus in Boden, northern Sweden, where abundant hydropower and regional mining supply chains converge. The core innovation is the direct-reduction process: instead of using coal to reduce iron ore, Stegra uses green hydrogen, cutting CO2 emissions by roughly 95% compared with blast-furnace steel. That technical shift is the foundation for a new European supply of low-carbon steel, which is increasingly demanded by automakers, construction firms, and consumer brands. The company rebranded to Stegra in September 2024 to signal that it is more than a steel mill. Its long-term platform vision is to combine renewable power, hydrogen production, and mineral processing into a repeatable template for heavy industry. By 2026, the Boden plant is reported to be more than halfway constructed, with gigascale electrolyzers (supplied by Thyssenkrupp Nucera) being installed and key offtake contracts signed. Customers reportedly include Porsche, Mercedes-Benz, Scania, and IKEA, and more than half of initial output has been pre-sold — a strong indicator that the “green premium” market is real. Stegra’s financing structure is as notable as its technology. Rather than relying solely on venture capital, the company blends project-finance debt with growth equity, totaling more than €6.5 billion in commitments. This makes it one of the largest private industrial raises in Europe and a flagship case for climate infrastructure funding. Its origins are tied to Vargas Holding, a Swedish venture-builder that also co-founded Northvolt and Polarium, acting as an institutional co-founder rather than a conventional accelerator. Early support from EIT InnoEnergy helped validate the project at the EU level. Stegra’s investor roster reflects its strategic importance: Altor Equity Partners, GIC, Just Climate, Temasek, and Porsche SE are among its backers. In 2026, Stegra represents the “Northvolt effect” done right: a proof that Europe can re-industrialize around clean energy and keep advanced manufacturing on the continent. If it succeeds, it will be a template for decarbonizing other hard-to-abate sectors, from cement to fertilizers, and a cornerstone of Europe’s green-industry competitiveness.
StartupGrowthClimateIndustrialEnergy
Uppsala, Sweden · IncubatorUppsala Innovation Centre (UIC) is a leading Swedish incubator and accelerator, consistently ranked among Europe’s top public incubators. Founded in 1999 and located in Uppsala – a city known for its major university and pharma industry cluster – UIC supports startups from idea to growth, with a strong focus on life sciences, medtech, energy, and IT. It is a public-private partnership, co-owned by Uppsala municipality, Uppsala University, SLU (Swedish University of Agricultural Sciences), and local industry. UIC offers a suite of programs: a pre-incubation phase for concept validation, a core incubation phase (up to 2 years) for business development and raising seed capital, and a accelerator phase for scaling up and internationalization. Uniquely, UIC doesn’t take equity but charges a modest fee – hence it’s seen as a neutral player with the startup’s interest at heart. Startups benefit from individualized coaching by experienced business advisors, free office and lab space, and connections to Uppsala’s rich network of experts (the city hosts big players like GE Healthcare, Pfizer, etc.). Access to lab facilities is a key advantage for biotech startups – UIC arranges subsidized lab rentals through partnerships with SLU and local science parks. Over 20+ years, UIC has nurtured over 1,000 companies. Alumni include OssDsign (innovative cranial implants, now publicly listed) and ScandiNova (pulsed power systems, a world leader in its niche). The incubator’s portfolio has also seen several acquisitions by international firms. UIC is particularly known for helping research-heavy projects with commercialization – many UIC startups are founded by professors or PhDs aiming to solve real-world problems with their inventions. They also run UIC “Business Lab” and “Startup Bootcamps” for very early-stage teams, including student entrepreneurs. UIC’s impact is evident: Uppsala punches above its weight in innovation metrics, and UIC has been recognized by UBI Global as a top-5 global incubator in 2019. By coupling Uppsala’s academic prowess with professional business guidance, Uppsala Innovation Centre continues to turn ideas “from lab to market,” driving regional growth and bringing science-based innovations to society.
IncubatorLife SciencesEnergyIT
Dunkirk, France · StartupVerkor is the industrial champion of the French "Battery Valley" and one of Europe's most important energy manufacturing plays. While many battery startups emphasize chemistry R&D, Verkor's differentiator is execution at scale. Its gigafactory in Dunkirk, which began commissioning in late 2025, is designed to reach 16 GWh of annual capacity—enough to power roughly 300,000 electric vehicles. The facility is among the most advanced battery plants in Europe, built to supply automotive OEMs with locally produced, low-carbon cells.
The year 2026 is Verkor's start-of-production milestone. Its cells are the core of the new Alpine A390 and other Renault Group EV programs, giving the company a high-profile anchor customer and a direct path to volume demand. Verkor positions itself around "low-carbon performance" by combining France's low-emission nuclear grid with a highly digitized Industry 4.0 production system that reduces scrap rates and energy intensity. The company argues that its batteries carry a materially smaller carbon footprint than cells manufactured in coal-heavy regions, which is increasingly important as automakers track embedded emissions across supply chains.
Beyond production, Verkor is investing in future chemistry and process innovation. The Verkor Innovation Centre (VIC) in Grenoble is expanding its work on next-generation chemistries, including sodium-ion cells that reduce reliance on lithium and cobalt. This R&D focus strengthens supply-chain resilience and creates optionality for lower-cost, lower-risk storage solutions as electric mobility scales. Verkor's roadmap also includes tighter integration between materials sourcing, cell design, and recycling, positioning it to meet Europe's stringent regulatory requirements on battery sustainability and traceability.
Verkor is backed by a mix of strategic and infrastructure capital. Macquarie Asset Management and Meridiam provide long-term project finance muscle, Renault Group anchors demand and industrial validation, EQT Ventures provides growth capital, and Sibanye-Stillwater supports raw material security. It was co-founded and supported early by EIT InnoEnergy and has strong operational ties to Schneider Electric, which helped design its digital factory systems. With support from the Macron administration and the European Investment Bank, Verkor has become a poster child for European industrial sovereignty. In 2026, it stands as proof that Europe can manufacture critical clean-tech hardware at global scale—and do it with a lower-carbon footprint.
StartupGrowthEnergyManufacturingClimate
Madrid, Spain · EventFlagship wind energy conference with an Innovation Park for startups. Price: about EUR 900-1200. Strong for grid integration, offshore wind, and drone inspection startups.
EventEventsEnergyClimate Tech
Dusseldorf, Germany · EventPartner trade fair to Tube covering wire and cable manufacturing. Price: about EUR 45-70. Key for smart cabling and energy transmission startups.
EventEventsManufacturingEnergy
Prague, Czech Republic · StartupWoltair is a digital marketplace and installation platform for heat pumps and solar systems. It streamlines the complex process of finding qualified contractors, securing subsidies, and completing installations. By 2026, the company is a notable Czech green-tech player pushing heat pump adoption across Central Europe. Its operational advantage is a software-driven workflow layered on top of local installer networks.
StartupGrowthGreenTechEnergyMarketplace
Wels, Austria · EventConference-led event on energy efficiency and renewables with 600+ experts from 60 countries. Price: about EUR 390 for full conference, with student discounts. Strong for policy-focused green tech founders.
EventEventsClimate TechEnergy