Cantos VC

Cantos is an SF & LA-based venture capital firm that aims to be the 1st check for founders transforming the physical world. It invests in near-frontier tech that will change the world, and just might save it, backing deeply technical founders at inception across climate tech, computational biology, aerospace, and next-generation computing. Founded in 2016 by General Partner Ian Rountree, the firm now manages approximately $120M. The firm functions as a true first-money-in partner, writing the earliest checks into non-obvious, technically ambitious teams at a stage where most traditional investors remain uncomfortable underwriting the technical and regulatory risk involved. Cantos primarily leads pre-seed and seed rounds, with a portfolio spanning over 40 companies including Astranis, Solugen, Skyryse, Radiant Nuclear, Castelion, Atom Computing, and Neros, reflecting a thesis centered on abundance, resilience, and technological advantage for democratic economies. The firm's investment approach prioritizes exceptional, relentless founders tackling difficult, physically instantiated problems in critical industries such as energy, defense, infrastructure, space, and advanced manufacturing, favoring full-stack deep-tech companies that integrate hardware, software, and services over component-only suppliers.