Founders Fund

Founders Fund is a San Francisco-based venture capital firm that backs science and technology companies across multiple stages, from seed to late-stage. It pursues transformative technologies and follows a founder-friendly investment approach that provides substantial support with minimal interference. The firm invests in ventures solving difficult problems across sectors such as aerospace and transportation, artificial intelligence, advanced computing, energy, healthcare, biotechnology, cybersecurity, fintech, consumer internet, software, robotics, and related technology fields. It has backed notable companies early, including SpaceX, Palantir, and Facebook, reflecting a history of partnering with ambitious founders to scale breakthrough technologies.

Jennifer Campbell

Partner

Lauren Gross

Partner and COO

Bridget Harris

Associate

Joey Krug

Partner

Sean Liu

Partner

Past deals in Mechanical Engineering

Magdrive

Seed Round in 2025
Magdrive Limited, established in 2019 and headquartered in Didcot, United Kingdom, specializes in developing advanced spacecraft propulsion systems tailored for small satellites. The company's innovative technology features a plasma thruster that combines the high thrust of chemical rockets with the high efficiency of electric thrusters. This dual capability allows spacecraft to travel faster and longer while reducing propellant requirements, thereby lowering costs and improving fuel efficiency for satellite maneuvers and missions in Low Earth Orbit (LEO).

Hadrian

Series B in 2024
Hadrian is a machine parts startup that manufactures precision components for technology companies, including aerospace and defense programs. It builds autonomous, software-defined precision component factories and an autonomous manufacturing platform that integrates software, robotics, and full-stack capabilities to scale mission-critical programs across space, aviation, and maritime sectors. By enabling aerospace startups, suppliers, and defense contractors to produce essential components with lower costs and greater efficiency, Hadrian aims to accelerate development timelines and reduce manufacturing complexity.

Hadrian

Series A in 2022
Hadrian is a machine parts startup that manufactures precision components for technology companies, including aerospace and defense programs. It builds autonomous, software-defined precision component factories and an autonomous manufacturing platform that integrates software, robotics, and full-stack capabilities to scale mission-critical programs across space, aviation, and maritime sectors. By enabling aerospace startups, suppliers, and defense contractors to produce essential components with lower costs and greater efficiency, Hadrian aims to accelerate development timelines and reduce manufacturing complexity.

Foundry Lab

Series A in 2021
Foundry Lab is a digital metal casting company that specializes in innovative microwave casting technology, allowing for same-day turnaround of metal castings. The company has developed a software tool that automatically generates dense metal parts from computer-aided design files, ensuring that these parts maintain the same physical properties as traditionally cast metal. This technology provides a push-button, hands-free manufacturing process, enabling manufacturers to produce on-demand, high-quality metal components with significantly reduced costs, time, and environmental impact compared to conventional foundry methods.

Hadrian

Seed Round in 2021
Hadrian is a machine parts startup that manufactures precision components for technology companies, including aerospace and defense programs. It builds autonomous, software-defined precision component factories and an autonomous manufacturing platform that integrates software, robotics, and full-stack capabilities to scale mission-critical programs across space, aviation, and maritime sectors. By enabling aerospace startups, suppliers, and defense contractors to produce essential components with lower costs and greater efficiency, Hadrian aims to accelerate development timelines and reduce manufacturing complexity.

Magdrive

Seed Round in 2021
Magdrive Limited, established in 2019 and headquartered in Didcot, United Kingdom, specializes in developing advanced spacecraft propulsion systems tailored for small satellites. The company's innovative technology features a plasma thruster that combines the high thrust of chemical rockets with the high efficiency of electric thrusters. This dual capability allows spacecraft to travel faster and longer while reducing propellant requirements, thereby lowering costs and improving fuel efficiency for satellite maneuvers and missions in Low Earth Orbit (LEO).

Magdrive

Seed Round in 2020
Magdrive Limited, established in 2019 and headquartered in Didcot, United Kingdom, specializes in developing advanced spacecraft propulsion systems tailored for small satellites. The company's innovative technology features a plasma thruster that combines the high thrust of chemical rockets with the high efficiency of electric thrusters. This dual capability allows spacecraft to travel faster and longer while reducing propellant requirements, thereby lowering costs and improving fuel efficiency for satellite maneuvers and missions in Low Earth Orbit (LEO).

Plethora

Venture Round in 2015
Plethora Corporation is a precision machining company that specializes in CNC machining, milling, and turning of various materials, including aluminum alloys, copper alloys, plastics, steels, and stainless steels. Founded in 2012 and headquartered in San Francisco, California, with an additional office in Marietta, Georgia, Plethora serves a diverse range of industries, such as robotics, automotive, aerospace, and consumer packaged goods, in the United States. The company offers innovative manufacturing systems that transform customer designs into custom parts by utilizing robotics and proprietary in-house software. Plethora also provides design feedback by analyzing CAD models directly within the client's CAD software, ensuring optimized manufacturing processes.

Plethora

Series A in 2014
Plethora Corporation is a precision machining company that specializes in CNC machining, milling, and turning of various materials, including aluminum alloys, copper alloys, plastics, steels, and stainless steels. Founded in 2012 and headquartered in San Francisco, California, with an additional office in Marietta, Georgia, Plethora serves a diverse range of industries, such as robotics, automotive, aerospace, and consumer packaged goods, in the United States. The company offers innovative manufacturing systems that transform customer designs into custom parts by utilizing robotics and proprietary in-house software. Plethora also provides design feedback by analyzing CAD models directly within the client's CAD software, ensuring optimized manufacturing processes.

Plethora

Seed Round in 2013
Plethora Corporation is a precision machining company that specializes in CNC machining, milling, and turning of various materials, including aluminum alloys, copper alloys, plastics, steels, and stainless steels. Founded in 2012 and headquartered in San Francisco, California, with an additional office in Marietta, Georgia, Plethora serves a diverse range of industries, such as robotics, automotive, aerospace, and consumer packaged goods, in the United States. The company offers innovative manufacturing systems that transform customer designs into custom parts by utilizing robotics and proprietary in-house software. Plethora also provides design feedback by analyzing CAD models directly within the client's CAD software, ensuring optimized manufacturing processes.
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