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Cantos

North America, California, United States, San Francisco

Description

Cantos is a San Francisco-based pre-seed venture capital firm, founded by General Partner Ian Rountree, dedicated to investing in companies at the "near frontier" where software, hardware, and wetware converge. The firm distinguishes itself by focusing on highly technical and often disruptive innovations at their earliest stages. Their investment philosophy centers on identifying foundational technologies that have the potential to redefine industries, moving beyond conventional software-as-a-service models to embrace complex, interdisciplinary solutions.

The firm's strategic focus on the intersection of these three domains allows them to back startups developing cutting-edge solutions in areas such as advanced computing, robotics, biotech, and new materials. Cantos aims to be the very first institutional capital for these nascent companies, providing not just funding but also critical guidance and network access during the crucial pre-seed phase. This hands-on approach is designed to help founders navigate the initial challenges of product development, market validation, and team building, laying a strong foundation for future growth.

Cantos has demonstrated its commitment to this specialized niche through significant fundraising efforts, including the close of its Cantos Fund III in 2022, which secured $50 million in capital. This fund empowers Cantos to continue its mission of backing ambitious founders tackling complex problems. Typically, Cantos writes initial checks ranging from $500,000 to $1.5 million, reflecting their sweet spot for early-stage, high-potential ventures that require substantial early capital to de-risk and scale their innovative technologies. Their disciplined approach to identifying and nurturing these deep tech startups positions them as a key player in the early-stage venture ecosystem.

Investor Profile

Cantos has backed more than 108 startups, with 9 new investments in the last 12 months alone. The firm has led 12 rounds, about 11% of its total and boasts 8 exits across its portfolio.

Investment Focus Highlights

  • Concentrates on Seed, Series A, Pre Seed rounds (top funding stages).
  • Majority of deals are located in United States, United Kingdom, Canada.
  • Strong thematic focus on Biotechnology, Software, Aerospace.
  • Led 3 rounds in the past year.
  • Typical check size: $500K – $1.5M.

Stage Focus

  • Seed (56%)
  • Series A (23%)
  • Pre Seed (7%)
  • Series B (6%)
  • Convertible Note (6%)
  • Debt Financing (1%)
  • Series Unknown (1%)

Country Focus

  • United States (94%)
  • United Kingdom (3%)
  • Canada (1%)
  • Nigeria (1%)

Industry Focus

  • Biotechnology
  • Software
  • Aerospace
  • Health Care
  • Fintech
  • Internet
  • Artificial Intelligence (Ai)
  • Financial Services
  • Information Technology
  • Medical
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FAQ

Frequently Asked Questions

Learn who this investor regularly partners with—both firms and angels—and explore their latest activity.

Who does Cantos frequently co-invest with?

Bossa Invest
South America, Sao Paulo, Brazil, São Paulo
Co-Investments: 5
KdT Ventures
North America, Texas, United States, Austin
Co-Investments: 8
IV
North America, California, United States, San Francisco
Co-Investments: 5
Refactor
North America, California, United States, Burlingame
Co-Investments: 9
Y Combinator
North America, California, United States, Mountain View
Co-Investments: 14
Bee Partners
North America, California, United States, San Francisco
Co-Investments: 6
Fifty Years
North America, California, United States, San Francisco
Co-Investments: 10
Andreessen Horowitz
North America, California, United States, Menlo Park
Co-Investments: 7
Venrock
North America, California, United States, Palo Alto
Co-Investments: 5
Khosla Ventures
North America, California, United States, Menlo Park
Co-Investments: 5

Which angels does Cantos often collaborate with?

RM
North America, California, United States, San Francisco
Shared Deals: 1
Matt Mickiewicz
North America, Canada
Shared Deals: 1
NB
North America, California, United States, Los Angeles
Shared Deals: 1
JG
North America, California, United States, San Francisco
Shared Deals: 1
Daniel Macklin
North America, California, United States, San Francisco
Shared Deals: 1
BF
North America, California, United States, San Francisco
Shared Deals: 5
LD
North America, California, United States, San Francisco
Shared Deals: 1
RR
North America, California, United States, San Francisco
Shared Deals: 1
AS
North America, California, United States, San Francisco
Shared Deals: 1
AR
North America, California, United States, San Francisco
Shared Deals: 1

What are some of recent deals done by Cantos?

Shinkei Systems

New York, New York, United States

Shinkei Systems is an automation agency that provides automation for fish harvesting.

Food and BeverageFood ProcessingIntelligent SystemsSeafoodSupply Chain Management
Series AJun 13, 2025
Amount Raised: $22,000,000
Remedy Scientific

San Francisco, California, United States

Remedy Scientific is a pioneering environmental remediation technology firm

Artificial Intelligence (AI)Environmental ConsultingSensor
SeedApr 9, 2025
Amount Raised: $11,000,000
Pilgrim

Redwood City, California, United States

Building the warfighter of tomorrow.

Health DiagnosticsMedical DeviceMilitaryNational Security
Pre SeedMar 17, 2025
Amount Raised: $3,250,000
Castelion

El Segundo, California, United States

Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.

AerospaceGovernmentManufacturingMilitaryNational Security
Series AJan 29, 2025
Amount Raised: $70,000,000
EARTH AI

San Mateo, California, United States

EARTH AI is a predictive explorer and driller for critical minerals.

Artificial Intelligence (AI)HardwareMineralMiningMining Technology
Series BJan 27, 2025
Amount Raised: $20,000,000
Bedrock Energy

Austin, Texas, United States

Bedrock Energy develops drilling technology and advanced subsurface simulation software to enable geothermal heating and cooling.

CommercialConstruction
Series AJan 22, 2025
Amount Raised: $12,000,000

Redefining the limits of signal processing and data transmission by changing the way waveforms are processed.

Information TechnologyInternetSoftware
SeedJan 15, 2025
Amount Raised: $7,150,000
Salient Motion

Irvine, California, United States

Salient Motion is an electric motion operating system designed to reimagine the American supply chain with help of cutting-edge software.

ElectronicsOperating SystemsSoftware
SeedOct 1, 2024
Amount Raised: $4,000,000
Intramotev

St Louis, Missouri, United States

Intramotev creates self-propelled battery-electric railcars that operates autonomously and reduce the reliance on traditional locomotives.

Autonomous VehiclesFreight ServiceLogisticsRailroad
Series AAug 15, 2024
Amount Raised: $14,400,000
The Lumber Manufactory

Washington, District of Columbia, United States

The Lumber Manufactory is a sawmmilling company that offers sustainable manufacturing of dimensional wood products.

ManufacturingWood Processing
SeedMay 28, 2024
Amount Raised: $4,099,992