Lisbon's Altice Arena is once again the epicentre of Europe's tech calendar as Web Summit 2026 opened its doors on Sunday morning. The four-day event, which has become a fixture for startups, investors and policymakers, is expected to draw more than 70,000 attendees from over 150 countries. This year's edition is dominated by two themes: the rapid commercialisation of AI agents and the growing regulatory scrutiny facing the sector's biggest players.
AI agents take centre stage
Walking the exhibition floor, it is hard to miss the shift from chatbots to autonomous agents. Startups from Berlin, Tallinn and Barcelona are showcasing systems that do more than answer questions—they book flights, manage supply chains and even negotiate contracts. "We've moved from talking to machines to letting them act on our behalf," said Marta Silva, a Lisbon-based venture capitalist attending the summit. "The question is no longer whether this works, but who controls it."
That question is particularly acute in Brussels. On the eve of the summit, the European Commission announced a formal investigation into Nvidia, the US chipmaker whose processors power most AI training and inference workloads. The probe will examine whether Nvidia's bundling of hardware and software, as well as its CUDA platform, unfairly locks in customers and stifles competition. This is the first major antitrust case targeting the AI supply chain under the EU's Digital Markets Act.
Nvidia has denied any wrongdoing, arguing that its success stems from innovation and that the market for AI chips remains fiercely competitive. But the investigation signals a broader European push to assert regulatory authority over the AI value chain, from semiconductors to cloud services. "Europe is not trying to block progress," said a Commission official speaking on condition of anonymity. "We want to ensure that the benefits of AI are shared, not hoarded."
Robots and regulation in the same room
The summit's robotics pavilion is a hive of activity, with humanoid prototypes from French and Italian firms drawing long queues. One standout is a collaborative robot from a Lyon-based startup designed to work alongside warehouse staff, adjusting its movements in real time. Another, from a Milanese company, uses reinforcement learning to navigate crowded streets for last-mile deliveries. These demonstrations are a reminder that Europe's robotics sector is thriving, even as its AI giants remain smaller than their US and Chinese counterparts.
Yet the mood is not entirely celebratory. Several exhibitors expressed unease about the regulatory environment, particularly the EU's AI Act, which is set to impose strict requirements on high-risk systems. "We welcome clarity, but the compliance burden can be heavy for a 20-person team," said Jonas Weber, co-founder of a Munich-based AI startup. "We are here to find partners who can help us navigate this."
The summit also provides a platform for political discussions. On Monday, European Commissioner for Digital Affairs Henna Virkkunen is scheduled to deliver a keynote on "trustworthy AI", and a panel with representatives from the European Parliament and national regulators will debate the future of AI liability. These sessions are likely to draw packed rooms, as companies seek to understand how the rules will apply to their products.
For those unable to attend in person, the summit's digital platform offers live streams and virtual networking. But the energy in Lisbon is unmistakable—cafés are full of founders pitching, and the city's trams are packed with badge-wearing delegates. The event runs until Wednesday, with the final day reserved for investor meetings and startup showcases.
As the sun set over the Tagus, the first day of Web Summit 2026 left a clear impression: Europe is determined to be a player in the AI revolution, not just a rule-maker. Whether that ambition translates into market leadership remains to be seen, but the conversations in Lisbon this week will shape the answer.
