Budapest, Hungary · Startup Commsignia is a Budapest-based V2X (vehicle-to-everything) communications company that builds the hardware, stacks, and testing tools that let cars, road infrastructure, and roadside units talk to each other using ITS-G5 and C-V2X standards — the technology layer that sits underneath cooperative driving, smart intersections, and safety-critical traffic use cases. The company sells DSRC/C-V2X OBUs and RSUs, a protocol stack used by automotive tier-ones, and a conformance-testing toolset that has become one of the most widely adopted quality-assurance environments for V2X implementations globally. Commsignia has partnered with major automotive players, smart-city deployments, and government road-safety programs in Europe and the US, and is one of the most internationally respected examples of a niche but strategically important European deep-tech company built entirely from Hungary. It pairs naturally with AImotive as the 'cars that see each other' half of the autonomy stack.
Milan, Italy · Event Milano Digital Week is a city-wide festival on digital innovation, AI and smart-city themes, with hundreds of largely free events across business, digital citizenship, technology, culture and education. The 2026 edition runs under the theme "La città generativa" (The Generative City), convening businesses, startups, citizens and institutions across Milan.
Stavanger, Norway · Event Northern Europe's leading smart city and urban tech conference held in Stavanger, attracting 4,000+ attendees from 50+ countries. Focuses on sustainable cities, digital infrastructure, and mobility. Strong government and municipality buyer presence makes it ideal for GovTech startups.
Bratislava, Slovakia · Startup Seak 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.
Bratislava, Slovakia · Startup Sensoneo provides enterprise-grade smart waste management systems that digitize collection workflows for cities and waste operators. Using ultrasonic sensors in bins and route-optimization software, it helps cities like Madrid and Prague reduce costs and emissions. The company is expanding into deposit return systems (DRS) software and broader circular-economy infrastructure. By 2026, Sensoneo is a recognized European leader in smart waste.
Barcelona, Spain · Event The world's largest smart-city event, organized at Fira Barcelona with 25,000+ urban planners, govtech vendors, mobility startups, and sustainability innovators. Covers digital twins, urban mobility, circular economy, energy transition, and citizen services. A primary sales channel for European urbantech startups. Tickets from EUR 200.
Berlin, Germany · Event Germany's main government-tech and smart-city conference organized by Bitkom at Messe Berlin, focusing on digital public services, AI in government, smart infrastructure, and cybersecurity for the public sector. Draws 15,000+ civil servants, govtech startups, and enterprise solution providers. Tickets from EUR 0 (expo) to EUR 300+ (conference).
Tartu, Estonia · Event Startup festival at the University of Tartu Sports Hall with 3,500+ attendees, 350+ investors, and 400+ startups. Includes the sTARTUp Pitching competition (often with a EUR 300k+ syndication pool) and Brella-powered 1:1 matchmaking.
Belgrade, Serbia · Startup Strawberry Energy is a Belgrade-founded smart-city and clean-tech startup best known for Strawberry Tree, a solar-powered public charging and urban-data station that became one of the first widely deployed pieces of street furniture combining renewable energy, IoT sensing, and free phone charging for cities. Founded in 2011 by Miloš Milisavljević while he was still a university student, the company has placed its units across the Balkans, the UK, and the Middle East, and expanded into smart-city data platforms that feed environmental, footfall, and air-quality metrics back to municipalities. Strawberry was recognized early as a European clean-tech pioneer, winning the European Commission's 'European Champion' award and being featured in MIT Technology Review's Innovators Under 35. For the directory it is a strong example of physical-product clean-tech built from Serbia, a counterpoint to the region's dominant gaming and SaaS stories.
Vienna, Austria · Event Decentralized city-wide startup festival across 50+ partner events over nine days with 10,000+ international attendees, 1,500+ startups, and active investor matchmaking. Most sessions free or low-cost; main-stage passes around EUR 200. Tracks span social impact, smart city, life sciences, and creative tech, a key CEE entry point for founders.
Warsaw, Poland · Accelerator City of Warsaw acceleration initiative connecting startups with municipal companies for pilot implementations, especially in sustainability and urban innovation. Participants receive mentoring and can compete for demo-day prizes.