Harpoon Ventures
Venture capitalActively deployingSan Diego · Pre-Seed–Series A · 1 people tracked
Investment thesis
Technology will define geopolitics, and strategic investment in AI, deep tech, software infrastructure, and cybersecurity is essential to restoring American technological leadership and ensuring strategic advantage. The firm provides not only capital but operational support, government introductions, and tactical expertise to help founders navigate the defense and federal contracting landscape.
Source: firm website, verified Jul 21, 2026.
Team · 1 people
from the firm's websiteCo-founder of Harpoon who was recognized early for identifying AI risk as an important mission and market, and has demonstrated hands-on involvement with portfolio companies including government introductions and strategic guidance.
What they invest in
from 6 of 63 portfolio companiesCleantech ×2Climate Tech ×2Data & Infrastructure ×2Deep Tech ×2Defense Tech ×2Energy ×2Enterprise Software ×2Hardware ×2
HQs:United States×3United Kingdom×1
Investments · showing 60 of 63
founders shown can be your intro pathAalo develops advanced nuclear reactor technology aimed at producing electricity at under 3 cents per kilowatt-hour. The company serves the global energy market and is focused on enabling virtually unlimited clean power generation.
Climate TechDeep TechEnergyHardware
Matt(Co-founder)Yasir(Co-founder)Mark NefzgerinDavid Jaluvkain
Satellite and space technology company with government business
eFlow extracts lithium from dilute brines in North America using direct lithium extraction technology, serving the clean energy and electric vehicle supply chain. The company focuses on domestic lithium production with minimal water and chemical use, positioning itself as an alternative to traditional mining operations.
CleantechEnergyNew Materials
Eric McShane(CEO and co-founder)Evan Gardner(CTO and co-founder)David Diaz(Founding Engineer)Peter Benedek(Founding Engineer)
Encord provides a data platform for developing and deploying multimodal AI systems, serving AI development teams at scale across training and production environments.
AI & Machine LearningData & InfrastructureEnterprise SoftwareLondon, GB
Ulrik Stig Hansen(Co-Founder & President)inEric Landau(Founder)in
Defense ecosystem company with special operations connections
Defense robotics company working on Army projects
Defense technology company providing near-term value to the DoD
Orbital Ops develops propulsion systems and related aerospace hardware for airborne vehicles. The company draws on deep expertise in turbomachinery and propulsion integration.
Advanced ManufacturingDeep TechDefense TechHardwareSpace TechLos Angeles, US
Ben Schleuniger(Founder)inRoss Doherty(Co-Founder & COO)inHunter
AI risk and mission-focused company
Monad is a security data pipeline platform that normalizes, filters, enriches, and routes security telemetry from any source to optimize SIEM costs and reduce alert noise for security teams.
CybersecurityData & InfrastructureEnterprise SoftwareSaaSNew York City, US
Sunny Rekhi(Founder)in
Frequently asked questions
- What stage does Harpoon Ventures invest at?
- Harpoon Ventures invests at the Pre-Seed, Seed, Series A stages.
- What sectors does Harpoon Ventures focus on?
- Harpoon Ventures focuses on AI & Machine Learning, Cybersecurity, Deep Tech, Defense Tech, Developer Tools.
- Where is Harpoon Ventures located?
- Harpoon Ventures is headquartered in San Diego, US.
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