The Recursive reports that Estonian energy storage company Skeleton Technologies is now valued at more than $1 billion after closing a nine-figure strategic round led by Siemens, though the companies did not disclose the exact investment amount or financial terms.

The deal makes Skeleton the region's newest unicorn and a rare European deep-tech entrant to the club built not on consumer software but on ultracapacitor and battery storage hardware.

Unicorn status for a European hardware startup is unusual enough, but the strategic logic is the real shock: a legacy German industrial giant is bankrolling an Estonian firm to build power systems for AI data centres alongside hyperscalers.

The Recursive notes Skeleton will work directly with hyperscalers in Silicon Valley on the power infrastructure that AI compute growth demands — a reversal of the usual flow in which American software companies expand into Europe.

For a market better known for consumer and fintech exits, a deep-tech energy storage unicorn funded by an industrial acquirer-in-waiting stands out sharply.

The unicorn milestone arrives amid a week of heavy investor appetite for AI-adjacent infrastructure.

Analytics Insight reports that AI infrastructure company Labelbox secured over $100 million in Series E funding, combining equity and a credit line, and says it will be profitable in 2026 after more than five times year-over-year growth.

Analytics Insight also reports fintech startup Ramp raised $1.85 billion led by Dragoneer Investment Group at a $60 billion valuation, with more than $2 billion in annualized revenue.

Together the rounds show capital concentrating in companies positioned as picks-and-shovels plays for the AI build-out.

For CEE founders, the milestone lands alongside other regional raises the outlet chronicled — Prague-based enterprise AI company Duvo's €28.55 million Series A led by Balderton Capital, and the European Investment Fund's roughly €27 million commitment to a new Czech deep-tech fund, IP Lab Ventures Fund I — reinforcing that Central and Eastern European deep tech is drawing global strategic capital.