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OTB Ventures is a deep tech venture capital firm focused on early-stage (seed to Series A) B2B companies, primarily in Central and Eastern Europe. They invest in disruptive technologies like AI, space tech, and cybersecurity with global potential.
40% of their portfolio is in Defense & Space. Deal activity increased 100% year-over-year (4 deals in the last 12 months). Their most common stage is series-a (40% of deals). Average disclosed round size is $25.9M (across 20 rounds with reported amounts).
Portfolio
20
Fund Size
$350M
Top Stage
Series A
Last 12 Mo
4
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
20 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| WWaiv | Series B | $33M | Mar 2026 |
 Hydrosat | Series B | $60M | Jan 2026 |
 MatrixSpace | Series B | $20M | Oct 2025 |
 Auriga Space | Seed | $6M | Jul 2025 |
 Apheris | Series A | $20.1M | Jan 2025 |
| SSynthara | Series A | $11M | Jun 2024 |
| KKurs Orbital | Seed | $4M | Mar 2024 |
 akirolabs | Seed | $5M | Jan 2024 |
 ClearSpace | Series A | $26.7M | Jan 2023 |
| SSettleMint | Series A | $16M | Oct 2022 |
 ICEYE | Series D | $136M | Feb 2022 |
| Hydrosat | Seed | $10M | Nov 2021 |
 Fractory | Series A | $9M | Sep 2021 |
| ICEYE | Series C | $87M | Sep 2020 |
| CCosmose | Series A | $15M | Aug 2020 |
| SSemron | Unknown | $10.8M | — |
 Plumerai | Series A | $8.7M | — |
 Synthara AG | Series A | $11M | — |
| IIngenix | Seed | $9M | — |
| TTimeseer.AI | Unknown | $20M | — |
Top Co-Investors
Luxembourg Future Fund3 shared
Seraphim Space3 shared
Cultivation Capital2 shared
Santa Barbara Venture Partners2 shared
True Ventures2 shared
In-Q-Tel2 shared
Raptor Group1 shared
Statkraft Ventures1 shared
HTGF1 shared
Vsquared Ventures1 shared
Deep Tech Labs1 shared
BAE Systems1 shared
Swisscom Venture1 shared
Lakestar1 shared
Happiness Capital1 shared
SquareOne1 shared
Trucks1 shared
Credo Ventures1 shared
Inovo1 shared
Partech1 shared
Last updated: 15 April 2026