30/03/2026
🔥🔥🔥 Defence Builder Accelerator is becoming a full defense tech ecosystem.
We co-founded it in 2024 together with Kyiv School of Economics and Buntar Aerospace to back UA companies along the whole path from prototype to scale. However, the market grew faster than we expected, and founders needed more than acceleration. So we responded.
Defence Builder is extending to include three directions: an accelerator (15+ companies, $40M+ combined valuation), a $5M early-stage fund (portfolio includes Buntar Aerospace, Huless, MaXon Systems), and specialized capabilities – sector intelligence, due diligence, and corporate governance.
🚀 Our Investment Director, Daria Yaniieva is taking the position of the President of the Defence Builder Ecosystem and will lead this next stage.
🇺🇦 Ukrainian defense tech is scaling. Defence Builder is building the infrastructure to support it.
🔥Big news for Defence Builder: we are expanding into a full defence tech ecosystem
In 2024, Sigma Software Labs, Kyiv School of Economics and Buntar Aerospacecreated Defence Builder with one belief: Ukrainian technologies can become world-class and a foundation of the country’s future economy.
We started as an accelerator, helping early-stage teams move from prototype to market. But as the market evolved, acceleration alone was no longer enough.
Research by KSE Institute, Defence Builder, and Brave1 estimates Ukraine's defence market at $4.8B, while investment grew from $10M in 2023 to $129M in 2025. Scale like this demands more capital, analytics, expertise, validation, and stronger connections across the market.
So Defence Builder is expanding beyond the accelerator model and launching new directions within the ecosystem. The ecosystem now brings together three integrated pillars:
🔹DB Accelerator continues to grow. Two batches have already been completed, with 15+ companies across key subsectors. Average product readiness is TRL 7, and the combined valuation of companies from the first two batches exceeds $40M. Batch 3.0 is currently underway and, for the first time, includes both Ukrainian and European teams.
🔹DB Fund I is a $5M early-stage VC actively deploying since 2025, investing in defence and dual-use companies from pre-seed to Series A, with tickets up to $300K. The DB founding partners committed the first $1.5M, alongside partners and investors from Ukraine, the US, the UK, and Europe. The portfolio already includes Huless, Sine Engineering, Falcons, Buntar Aerospaces and MaXon Systems.
🔹DB Capabilities is a set of specialized services covering sector intelligence (with KSE Institute and 20+ analysts), venture deals advisory, defense-specific due diligence, and corporate governance aligned with EU and US standards.
Daria Yaniieva Investment Director at Sigma Software Labs has become President of the Defence Builder Ecosystem and will lead its next stage of growth. At the same time, DB Accelerator team — led by Line Rindvig — will continue to develop this direction within the ecosystem.
“We see Defence Builder as one entry point to the defence market. As the sector grows, so does the number of stakeholders with different requests — from companies and investors to partners and institutions. Our goal is to bring together the capital, expertise, analytics, partnerships, and support they need within one ecosystem, helping the market grow faster and operate more predictably for everyone involved,” Daria Yaniieva
Over the past two years, we have supported 25+ companies, built a network of 50+ partners, and connected thousands of people across the defence market. Thank you to everyone building Defence Builder with us.
More to come soon. Stay tuned!