HAX is a hands-on venture capital accelerator for pre-seed hard tech startups developing breakthrough technologies in physical industries. Operating a 35,000 square foot headquarters in Newark, New Jersey with additional offices in Shenzhen, Pune, and Tokyo, HAX provides $550,000 in initial investment along with a six-month collaborative residency offering engineering support, prototyping facilities, manufacturing expertise, and fundraising guidance. Part of SOSV's $1.5 billion venture capital platform, HAX has graduated 257 companies with a combined valuation exceeding $8.1 billion and total fundraising of $1.76 billion. Their portfolio spans sustainability, industrial automation, human health, robotics, sensors, and critical materials, with notable companies including Unspun (custom apparel), R-Zero (UV-C disinfection), and Neptune Robotics (underwater cleaning).