VXI Capital

VXI Capital is a venture capital firm based in Somerville, Massachusetts, United States, investing primarily in companies across the United States. It backs founders tackling large-scale technical problems in hardware, alternative energy, defense-adjacent technology, and healthcare, with portfolio exposure spanning fusion energy, grid and transmission hardware, wireless power electronics, carbon capture, radar sensing, metals recycling, and plant-based food technology. The firm uses a "barbell" strategy, writing initial checks around the Series A stage for a small, concentrated set of companies and reserving significantly larger follow-on capital for later Series C/D growth rounds rather than spreading capital across many deals. It favors technical founders building first-of-a-kind hardware or deep-tech systems rather than pure software plays. VXI Capital closed its debut fund, raising approximately $50M, in 2024, and is led by founder and managing director Orin Hoffman, former CTO of the Defense Innovation Unit, who previously worked at The Engine, an MIT-connected tough-tech investor.