SOSV

Invests in early-stage deep-tech startups through equity accelerator programs and global investor introductions across technology sectors.

SOSV is a U.S.-based deep-tech venture capital firm founded in 1995 by Sean O'Sullivan. It manages about $1.5 billion in assets, supports roughly 800 active portfolio companies, and describes a mission centered on human and planetary health.

Its capital is equity, not grants. The standard check is a pre-seed SAFE of up to $550,000, paired with up to six months of lab residency, technical support, and introductions to investors. Its main programs are SOSV NY for biology and life sciences, SOSV SF for broader deep tech, and SOSV HAX for hard tech and manufacturing, with Genesis Consortium able to add $250,000 for qualifying startups.

SOSV's operating model suits founders building physical products in biotechnology, medical technology, climate, energy, materials, robotics, and manufacturing. The firm reports a global team, offices across the United States and Asia, and a community that spans 82 nationalities in 58 countries. Its portfolio companies have collectively raised $7.3 billion, which signals a platform built for follow-on capital as much as first checks.