London has reclaimed its position as Europe’s top tech ecosystem, knocking Paris off the top spot, driven by record AI investment, according to new data.
The Dealroom Global Tech Ecosystem Index data also shows that Europe is home to more of the world’s highest-performing tech ecosystems relative to population size than North America and every other region in the world.
In 2024, London lost its position as the top tech ecosystem to Paris, but in 2025 it has reclaimed the top spot, powered by a record $7bn in AI investment, up from $3.9bn in 2024, the creation of new unicorns, and its depth across sectors, Dealroom said.
In 2025, London tech companies raised $17.8 billion, up 45 per cent from 2024, with the city now home to 138 unicorns, including the likes of Wayve, Granola and ElevenLabs.
ChatGPT developer OpenAI is to make London its largest research hub outside of its San Francisco headquarters, while Anthropic recently announced plans for a major new London with capacity for 800 staff.
