ReaktorX is a San Francisco-based venture accelerator and pre-seed investor backing exceptional under-25, first-time technical founders from Central and Eastern Europe, including math, physics and IT olympiad talent. It invests $50K via SAFE for about 5% equity, has led investments, and supports founders through a one-month San Francisco residency, mentorship and investor access. Its portfolio focus spans AI and machine learning, developer tools, health tech, gaming, commerce, logistics and SaaS.