October brought several major investments to Central and Eastern Europe, led by Skeleton Technologies’ more than $100 million strategic investment from Siemens and BlackWall’s $100 million round. Other notable investments went to Ukrainian defence tech companies Buntar Aerospace and Osavul, while smaller deals spanned AI software, space communications, and automotive e-commerce.
Here are the CEE funding rounds announced during the month, from largest to smallest.
BlackWall, $100M Series C
Location: Estonian-founded, with an office in London, UK
Founded in: 2019
Recent funding sources: AVP, Dawn Capital, MMC Ventures, and Tera Ventures
BlackWall provides web traffic security solutions for hosting, cloud, and managed service providers. The company will use its $100 million Series C funding to establish and expand operations in 12 regions across North America, Europe, Asia-Pacific, and the Middle East, while adding new traffic security capabilities to its platform.
Skeleton Technologies, over $100M strategic investment
Location: Estonia and Germany
Founded in: 2009
Total funding received: €392M in venture capital funding as of May 2026, plus the latest investment of more than $100M
Recent funding sources: Siemens
Skeleton Technologies develops high-power energy storage systems based on supercapacitors, designed to manage rapid fluctuations in electricity demand. Its strategic investment of more than $100 million from Siemens, which pushed the company's valuation above $1 billion, will support US manufacturing expansion.
Sensible Biotechnologies, $47M in equity and non-dilutive financing
Location: Bratislava, Slovakia
Founded in: 2021
Recent funding sources: Oxford Science Enterprises, OTB Ventures, In-Q-Tel, Recode Ventures, BlueYard Capital, Y Combinator, the family office of Christoph Huber, Tim Garnett, the Government of Slovakia
Sensible Biotechnologies develops technology for producing naturally modified mRNA in engineered living cells. Its $47 million investment, including a Series A led by Oxford Science Enterprises and up to $20 million in non-dilutive funding, will help fully automate its VECTOR platform and build clinical-grade manufacturing capacity in Slovakia.
Buntar Aerospace, $16M funding round
Location: Ukraine
Founded in: 2023
Total funding received: $30M
Recent funding sources: Freedom Fund VC, Gardar Venture Capital, Iron Wolf Capital, and Autonomy Capital
Buntar Aerospace develops autonomous reconnaissance drones and AI software for military applications, including its Buntar-3 drone and Buntar Copilot AI assistant. Following its $16 million funding round, the company plans to accelerate research and development, expand production capacity, strengthen its engineering and management teams, and support international expansion of its dual-use technologies.
Osavul, €8.5M Series A
Location: Kyiv, Ukraine, and Delaware, the US
Founded in: 2022
Total funding received: Over €12M
Recent funding sources: 33N Ventures, Balnord, G+D Ventures, and 42CAP
Osavul develops an AI-powered platform that detects and assesses hybrid threats by analysing signals across information, cyber, and physical domains. With its €8.5 million Series A, the company plans to expand its AI capabilities, grow its commercial team, and enter new markets and industries, particularly targeting critical infrastructure operators and businesses in energy, transport, logistics, and defence.
Holo, €5M seed round
Location: Vilnius, Lithuania
Total funding received: over €5M, with less than €1M raised before the latest round
Recent funding sources: Market One Capital, Silicon Gardens, FirstPick, Leonis Capital, NGL, Tekton Ventures, and business angels
Holo develops an AI-powered platform that plans and executes marketing activities for small businesses, including advertising, social media, email campaigns, and SEO content. The company will use its €5 million seed round to further develop its marketing autopilot, reach more small businesses, and expand its team in Vilnius.
Golbriak Space, €4M seed round
Location: Estonia, with an Italian holding company
Founded in: 2017
Total funding received: €4M in disclosed funding
Recent funding sources: Join Capital, PhotonVentures, and Takeoff
Golbriak Space develops laser communication terminals for satellites and airborne platforms. The €4 million seed investment will support the industrialisation of its Estonian operations and scaling production as the company advances commercial negotiations for programmes involving several thousand systems. Golbriak is preparing deployments across multiple commercial space programmes from 2027.
Monopulse, €2M funding round
Location: Lithuania and Denmark
Founded in: 2021
Total funding received: €2M in the latest round, alongside €1.12M in financing secured in November 2025
Recent funding sources: Coinvest Capital, NGL Ventures, Plug and Play Ventures, and private investors from the Lithuanian Business Angels Network
Monopulse develops unmanned aerial systems for intelligence, surveillance, and reconnaissance missions, including drones designed to operate in environments affected by GPS interference and disrupted communications. Its funding round will support production capacity expansion, research and development, and entry into additional NATO markets, including Germany, France, and the Netherlands.
Cachet, undisclosed funding round
Location: Tallinn, Estonia
Founded in: 2018
Total funding received: around €11M
Recent funding sources: Spintop Ventures, Truffle Capital, and Icebreaker.vc
Cachet develops insurance solutions for shared mobility and gig economy platforms, integrating coverage into platform operators' systems. Its latest funding round will help expand its product offering and sales team, further develop its risk-control technology, and strengthen its European presence. Cachet operates in 16 markets and works with platforms including Bolt, Voi, Ryde, and Turo.
