# Cantos

> Cantos is a San Francisco venture capital firm founded by Ian Rountree in 2016. It backs pre-seed and seed founders building businesses in the physical world, including energy, biotechnology, aerospace, manufacturing and computing. The firm announced a $70 million fourth fund in June 2026.

- **Founded:** 2016
- **Headquarters:** San Francisco, United States
- **Founders:** Ian Rountree (Founder and General Partner)
- **Products:** Pre-seed and seed venture investment, Portfolio counsel, Portfolio careers network, Near Frontier
- **Notable:** Announced a $50 million third fund in September 2022., Announced an oversubscribed $70 million fourth fund in June 2026., Built a portfolio including Dusty Robotics, Astranis, Radiant, Solugen and Neros.

## Products & services

- **Pre-seed and seed venture investment** — Early equity financing; Rountree described typical first checks of $1.5 million to $4 million in a public Fun Raising interview.
- **Portfolio counsel** — Ongoing founder support; team members also hold selected board and observer roles.
- **Portfolio careers network** — Public job board and talent network linking candidates to portfolio-company roles.
- **Near Frontier** — Podcast featuring founders and investors discussing physical-world technologies.

## Achievements

- Announced a $50 million third fund in September 2022.
- Announced an oversubscribed $70 million fourth fund in June 2026.
- Built a portfolio including Dusty Robotics, Astranis, Radiant, Solugen and Neros.

## Latest updates

- **2026-10** — Cantos’s LinkedIn feed highlighted Radiant’s Navy selection and non-nuclear reactor testing; these concern a portfolio company, not Cantos revenue.
- **2026-06** — Announced Fund IV and a new identity developed with Asimov Collective.
- **2025-08** — Rountree published a reassessment of technical depth as a predictor of investment success.

## Links

- Website: https://cantos.vc/
- LinkedIn: https://www.linkedin.com/company/cantos-ventures/
- Twitter/X: https://x.com/cantos
- Facebook: https://facebook.com/cantosvc/

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Profile page: https://yespress.io/cantos
Published by YesPress — https://yespress.io
Last updated: 2026-10-27