Underline

Underline is a Bucharest-based venture capital firm backing seed-stage technology founders, including pre-seed, seed and late seed companies, with a focus on agentic AI, industrial tech, space tech, defense tech and founder-led sales. Its investment geography includes Europe, with activity across Romania, Bulgaria, Germany, Slovenia, Serbia, Croatia, Ireland and Switzerland, as well as the United States, and it has an average cheque size of $500,000. The firm is relevant for early-stage founders moving from seed toward Series A in AI, automation, analytics and manufacturing-related technology.