David Cowan

Aerospace and Cybersecurity VC

📍 Redwood City, California, United States🔄 Updated September 2026💼 20 investments📅 26 years investing🗓 Last invested Jun 2021𝕏 @upgrade_to_unlock
VC🌍 United States20+ investments
20
Total investments
5
Early stage
4
Mid stage
2
Late stage
26y
Years active

Portfolio

13 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Jun 2021
Xanadu Quantum Technologies Inc. is a Canadian quantum technology company, and one of the worlds leading photonic quantum hardware providers. Founded in 2016, Xanadus mission is to build quantum computers that are useful and available to people everywhere. To achieve this mission, the company has taken a full-stack approach and builds hardware, software, and pursues state-of-the-art research with select partners. The company is also advancing the field of quantum machine learning (QML) through the development of PennyLane, an open-source project that has become a leading software library among quantum researchers and developers. Xanadu is bringing together exceptional minds from around the world to build something extraordinary. Learn more at xanadu.ai
Board Member
Mar 2020
Rigetti is a pioneer in full-stack quantum computing. Rigetti quantum computers are based on superconducting qubits, which are widely believed to be the leading qubit modality given their maturity, clear path to scaling, and fast gate speeds. Current Rigetti quantum computing systems achieve gate speeds of 50-70ns, which is about 1,000 times faster than other modalities such as ion traps and neutral atoms. Rigetti sells on-premises 9-qubit to 108-qubit quantum computing systems, supporting national laboratories and quantum computing centers. Rigetti’s Cepheus 36-qubit to 108-qubit systems are based on the Company’s proprietary chiplet-based technology and include the Company’s control electronics. Rigetti’s 9-qubit Novera QPU supports a broader R&D community with a high-performance, on-premises QPU designed to plug into a customer’s existing cryogenic and control systems. The Company operates quantum computers over the cloud through its Rigetti Quantum Cloud Services (QCS) platform, enabling global enterprise, government, and research clients to pursue R&D. The Company’s proprietary quantum-classical infrastructure provides high-performance integration with public and private clouds for practical quantum computing. Rigetti developed the industry’s first multi-chip quantum processor for scalable quantum computing systems. Leveraging this proprietary technology, Rigetti deployed the industry’s largest multi-chip quantum computer in 2025 with Cepheus-1-36Q, based on four 9-qubit chiplets tiled together. The Company designs and manufactures its chips in-house at Fab-1, the industry’s first dedicated and integrated quantum device manufacturing facility.
Board Member
Mar 2018
Velo3D provides a fully integrated metal 3D printing solution for mission-critical parts used for space exploration, to enhance transportation efficiency, and to produce cleaner energy. Our advanced solution helps innovators build the complex parts they need without compromising design or quality, empowering the visionaries of today to build the technologies of tomorrow. @FastCompany World's Most Innovative Manufacturing Companies.
Board Member
Sep 2017
Iris Automation is dedicated to creating an aviation environment where no two aircraft ever collide mid-air. We leverage innovative AI-based vision technology that enables uncrewed and crewed aircraft to mitigate the risk of airborne collisions - vital for safe, scalable, and efficient operations across countless industries. Iris’ onboard and ground-based Casia systems give operators the reliability needed to safely navigate an increasingly complex and congested airspace. We work closely with civil aviation authorities globally as they implement regulatory frameworks to advance safety and efficiency in aviation.
Board Member
2014
iSIGHT Partners was acquired by FireEye in January 2016. Since 2007, iSIGHT Partners has been recognized as the leader in cyber threat intelligence. Through its established intelligence team made up of over 200 different experts in 16 different countries, the iSIGHT Partners team focuses exclusively on analyzing and understanding the global threat ecosystem, to include threat sources and the methodologies they employ, and partners with its customers security and intelligence operations to empower an intelligence-led security strategy that connects intelligence directly to their business.
Board Member
Dec 2012
We stop DDoS attacks. Before they stop you. Trust us to keep you online. Founded by Barrett Lyon, who created the Distributed Denial of Service (DDoS) attack mitigation industry more than 10 years ago, Defense.Net has combined the top minds in the DDoS space with breakthrough new technologies designed to effectively address today’s and tomorrow’s DDoS mitigation challenges. It is the only company built to stand behind the traditional market leaders to defend businesses and organizations against this new generation of massive and sophisticated DDoS attacks while delivering the highest levels of Internet application. With increasing threats from the escalating scale and complexity of DDoS attacks and a growing number of antagonists willing to use them, Defense.Net protects organizations from modern attacks by providing end-users with a seamless experience as if no attack were occurring. Defense.Net is backed by investors that include visionary security and Internet investor Bessemer Venture Partners (BVP).
early stageInternet
Board Member
Aug 2010
Terra Bella, now part of Planet, designs and operates the SkySat satellite constellation. We use data from space to solve problems on Earth; and are pioneering the search for patterns of change in the physical world to help address global economic, environmental, and humanitarian challenges.
Board Member
Nov 2009
Zoosk is a leading online dating company that learns as you click in order to pair you with singles with whom you’re likely to discover mutual attraction. Zoosk’s Behavioral Matchmaking™ technology is constantly learning from the actions of more than 40 million members in order to deliver better matches. Zoosk is a market leader in mobile dating. Available in over 80 countries and translated into 25 languages, Zoosk is a global online dating platform.
Board Member
Sep 2009
Reputation is the only platform that empowers companies to fulfill their brand promise by measuring, managing, and scaling their reputation performance in real-time, everywhere. Functioning as a business’ eyes and ears in the spaces where customers talk, post, review, and recommend, Reputation AI-powered product stack analyzes vast amounts of public and private feedback data to uncover predictive insights for companies to act on, and improve their online reputations. Visit reputation.com to learn more.
Board Member
Nov 2007
NortonLifeLock and Avast have merged and are now Gen™. ​NortonLifeLock Inc. (NASDAQ: NLOK) is a global leader in consumer Cyber Safety with a growing portfolio of trusted and recognized brands. Our award-winning products and services help protect and empower people to live their digital lives safely. Nearly 80 million users in more than 150 countries trust us with their personal information. We’re dedicated to making it easy for them to keep their connected lives safer while helping to secure their devices, online privacy, identity, and home and family needs. ​ NortonLifeLock.com​ Norton.com​ Avira.com LifeLock.com​ ReputationDefender.com
Board Member
Mar 2007
We are a company on a mission to do good through technology. Vimo dba GetInsured was founded with the passion to help as many Americans enroll in affordable health insurance as possible, with the same ease as buying a plane ticket or booking a hotel room online. After the passage of the Affordable Care Act, we pivoted our mission to help states build such easy-to-use marketplaces through a SaaS platform. Today, our focus is largely the same — leverage cloud-based SaaS solutions to modernize and streamline public sector health and human services operations, enabling more Americans to gain easy and timely access to affordable healthcare and safety net programs. As the Vimo family grows, so does our capacity to help Americans get the coverage they need. We look forward to the work ahead and all the good that can be done through our cutting-edge technology. We are truly living up to our mission: to make finding and enrolling in affordable health coverage easy for all Americans.
Board Member
Jun 2002
Nominum™, now part of Akamai, is a pioneer and global leader in DNS-based security and services innovation. The Silicon Valley company provides an integrated suite of carrier-grade DNS-based solutions that enable fixed and mobile operators to protect and enhance their networks, strengthen security for business and residential subscribers and offer innovative value-added services that can be monetized. More than 130 service providers in over 40 countries trust Nominum to deliver a safe, customizable internet and promote greater value to over half a billion users.
Experience · 22 entries
All (22)
Investments (20)
Founder (1)
Board (20)
2021
Board Member
Jun 2021
Xanadu Quantum Technologies Inc. is a Canadian quantum technology company, and one of the worlds leading photonic quantum hardware providers. Founded in 2016, Xanadus mission is to build quantum computers that are useful and available to people everywhere. To achieve this mission, the company has taken a full-stack approach and builds hardware, software, and pursues state-of-the-art research with select partners. The company is also advancing the field of quantum machine learning (QML) through the development of PennyLane, an open-source project that has become a leading software library among quantum researchers and developers. Xanadu is bringing together exceptional minds from around the world to build something extraordinary. Learn more at xanadu.ai
2020
Board Member
Mar 2020
Rigetti is a pioneer in full-stack quantum computing. Rigetti quantum computers are based on superconducting qubits, which are widely believed to be the leading qubit modality given their maturity, clear path to scaling, and fast gate speeds. Current Rigetti quantum computing systems achieve gate speeds of 50-70ns, which is about 1,000 times faster than other modalities such as ion traps and neutral atoms. Rigetti sells on-premises 9-qubit to 108-qubit quantum computing systems, supporting national laboratories and quantum computing centers. Rigetti’s Cepheus 36-qubit to 108-qubit systems are based on the Company’s proprietary chiplet-based technology and include the Company’s control electronics. Rigetti’s 9-qubit Novera QPU supports a broader R&D community with a high-performance, on-premises QPU designed to plug into a customer’s existing cryogenic and control systems. The Company operates quantum computers over the cloud through its Rigetti Quantum Cloud Services (QCS) platform, enabling global enterprise, government, and research clients to pursue R&D. The Company’s proprietary quantum-classical infrastructure provides high-performance integration with public and private clouds for practical quantum computing. Rigetti developed the industry’s first multi-chip quantum processor for scalable quantum computing systems. Leveraging this proprietary technology, Rigetti deployed the industry’s largest multi-chip quantum computer in 2025 with Cepheus-1-36Q, based on four 9-qubit chiplets tiled together. The Company designs and manufactures its chips in-house at Fab-1, the industry’s first dedicated and integrated quantum device manufacturing facility.
2018
Board Member
Mar 2018
Velo3D provides a fully integrated metal 3D printing solution for mission-critical parts used for space exploration, to enhance transportation efficiency, and to produce cleaner energy. Our advanced solution helps innovators build the complex parts they need without compromising design or quality, empowering the visionaries of today to build the technologies of tomorrow. @FastCompany World's Most Innovative Manufacturing Companies.
2017
Board Member
Sep 2017
Iris Automation is dedicated to creating an aviation environment where no two aircraft ever collide mid-air. We leverage innovative AI-based vision technology that enables uncrewed and crewed aircraft to mitigate the risk of airborne collisions - vital for safe, scalable, and efficient operations across countless industries. Iris’ onboard and ground-based Casia systems give operators the reliability needed to safely navigate an increasingly complex and congested airspace. We work closely with civil aviation authorities globally as they implement regulatory frameworks to advance safety and efficiency in aviation.
2016
Claroty
Board Member
May 2016
Show all 22 entries ↓
Investment activity
2000–2021 · 20 investments
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