The U.K. and Germany are emerging as key hubs for a new wave of AI defense startups, as Europe scrambles to rearm amid rising geopolitical tensions.

Private funding for defense startups across the region has ramped up in recent years, with investors looking to tap into increasing government military budgets, driven by the ongoing Russia-Ukraine war and pressure from the Trump administration.

But it’s ecosystems in the U.K. and Germany that are seeing the most activity. The majority of the biggest rounds across the sector have been for startups based in those two countries, with both emerging as key launchpads into new markets and battlefield training.

David Ordonez, senior associate at NATO Innovation Fund, told CNBC that this was “thanks to the scientific expertise of their talent base, national commitments to treat this sector as an economic engine for growth and a manufacturing base that enables the rapid scaling of breakthrough innovation.”

Venture capital for European defense startups has spiked as members of the NATO military alliance have agreed to increase security spending to 5% of gross domestic product, and defense departments in London and Berlin have increasingly signaled a willingness to adopt new technology built by younger players in the market.