Defence Builder Fund I — Pre-Seed & Seed VC Firm ($100K–$300K Checks)
Defence Builder Fund I is a Pre-Seed, Seed, Series A venture capital firm based in Kyiv, Ukraine investing in AI / ML, Security. The firm typically writes $100K–$300K checks and has 7 portfolio companies in our records.
- Check size
- $100K–$300K
- Portfolio
- 7 companies on record
- Partners
- 3 listed
- Stage
- Pre-Seed, Seed, Series A
- Sectors
- AI / ML, Security
- HQ
- Kyiv, Ukraine
- AUM
- Not in our records
Last verified: 2026-10-27
Pre-Seed, Seed, Series A
$100K – $300K
7+ companies
3 partners
Investment Thesis
An early-stage venture fund backing Ukrainian defense tech startups, with sectors including UAVs, electronic warfare, command and control, intelligence and reconnaissance, cyber, and dual-use deep tech. It focuses on startups operating in Ukraine and allied defense contexts.
How Defence Builder Fund I invests
Defence Builder Fund I is a vc firm based in Kyiv, Ukraine. The firm invests at the Pre-Seed, Seed, Series A stages, with a focus on AI / ML, Security.
Defence Builder Fund I typically writes checks of $100K–$300K per investment.
Defence Builder Fund I has backed 7 companies in our records, including Buntar Aerospace, Huless, sine.engineering.
Partners & Team
Kateryna Bezsudna
General Partner
Line Ridvig
General Partner
Valery Krasovsky
General Partner
Industry Focus
Invests In
Portfolio Companies (7)
Other
Buntar Aerospace
Develops GPS-free reconnaissance UAV platforms and mission-planning tools for frontline use.
Huless
Builds tethered UAV relay systems for persistent military communications.
sine.engineering
Makes communications and navigation hardware for defense applications.
Falcons
Builds an EW and C2 platform, including RF direction-finding systems.
DOD Solution
Builds onboard AI modules for drones and other unmanned systems to navigate and operate in GPS-jammed or link-denied environments.
Trinity Robotics
Ukrainian developer of unmanned ground vehicles, including the Konyk ONE platform.
MaXon Systems
Develops autonomous detect-to-defeat systems for intercepting Shahed-type drones.
- •Raising at Pre-Seed, Seed, Series A? You're squarely in their sweet spot.
- •Lead with your fit in AI / ML, Security — the sectors they actively back.
- •Size your ask to their typical $100K – $300K check.
- •warm intro preferred
- •Address your outreach to a specific partner, such as Kateryna Bezsudna, General Partner.
- •A warm introduction beats a cold email. Get matched and request an intro.
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