Top California Defense Startups (48)

We’re developing reusable vehicles that bring payloads home from orbit safely and precisely, enabling faster in-space manufacturing, global delivery, and entirely new capabilities in the space economy.

Red 6 is an innovative Augmented Reality (AR) technology startup leading the way in synthetic air combat training. Our primary technology, supporting our ATARS product, enables pilots to simulate the cognitive challenges of flying while accessing realistic, scalable training in dynamic outdoor environments

Rangeview is building a modern casting platform to manufacture critical metal parts for aerospace, defense, and energy. We combine advanced software, automation, and materials science to reinvent how parts are designed and produced. Based in El Segundo, California, our team brings engineering, manufacturing, and technology together to build the foundry system that reindustrializes America.

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical materials for energy, AI, and defense technologies. It combines digital infrastructure with mineral project development to secure reliable and sustainable supply chains.

Intellisense Systems, Inc. is a leading provider of advanced sensing and display solutions supporting a data continuum from acquisition to visualization. We enhance our hardware with software that adds intelligence to our systems and can turn raw data into useful information for improved decision making and process automation. Intellisense Systems offers both off-the-shelf products and custom development services. These services include...

Building the frontline service to safeguard all off-earth operations.

Founded in 2021, Muon Space is an end-to-end Space Systems Provider that designs, builds, and operates LEO satellite constellations delivering mission-critical data. Our revolutionary, integrated technology stack enables customers to optimize every dimension of their missions for faster time-to-orbit and superior constellation remote sensing performance. From climate monitoring to national security, Muon Space is dedicated to delivering Earth intelligence for a...

Established in 2005, Tridant Solutions is a professional and management services firm serving military, federal, and private clients with mission-critical program support. Its capabilities include supply-chain sourcing, technical-records and document-lifecycle management, logistics and material management, auditing, safety and compliance training, medical readiness and case management, medical talent mobilization, and procurement/acquisition services. The company is a multi-certified small business headquartered in...

The space segment has become critical infrastructure. It powers everything from GPS and climate monitoring to missile warning and global broadband. But the ground segment hasn’t kept up. Most ground networks today were designed for science missions, not for the scale, urgency, or diversity of today’s space economy. At Northwood, we’re building a global, software-defined ground network from the ground...

Space Kinetic is focused on our nation’s most urgent national security priorities. Our goal is to rethink space operations down to first principles to deliver game-changing capabilities for missile defense and space superiority.

Umbra builds next-generation space systems that observe the Earth in unprecedented fidelity. Our mission: Deliver global omniscience. To stay ahead of climate change, geopolitical risk, and other major crises and issues, we need a global understanding of what is changing, where, and how fast. Umbra provides easy access to the highest quality commercial satellite data available, which is an indispensable tool for...

Tri Tool Technologies is a global leader in the design and manufacture of custom-engineered solutions and precision machine tools. They provide specialized on-site machining, pipe beveling, tube squaring, and flange facing services. The company serves diverse industrial sectors including aerospace, government and defense, life sciences, power generation, oil and gas, and semiconductors, focusing on solving complex challenges with innovative, high-quality...

Our goal is to deliver composite parts faster than any other supplier in the market. We want to continually impress our customers with our speed, quality, and responsiveness to their needs.

Artemis Consulting is a small, woman-owned business, founded in 2005, and headquartered in San Diego, CA.  We are a business consulting firm dedicated to delivering superior professional support consulting services.  We partner with customers throughout the Department of Defense to deliver critical acquisition, programmatic, and functional support that enables our clients to overcome their most persistent challenges.

Durin was founded under the belief that raw materials should not be a constraint on civilization's progress. We are actively developing the technologies to make this possible, with the ultimate goal of becoming the foundation of the global supply chain. Our modern way of life, from smartphones to skyscrapers, starts as ore in the ground. But mines don't simply appear. In...

Cannon is a multidisciplinary engineering and consulting firm founded in 1976 that delivers civil, mechanical, electrical, surveying, controls and construction management services. Serving land development, water resources, transportation, energy, industrial, municipal, aerospace & defense and public infrastructure clients, Cannon focuses on partnering with clients to deliver reliable, responsive solutions that emphasize safety, operability, maintainability and community impact.

Making previously impossible missions possible

QuinStar Technology, Inc. is an ISO 9001:2015 and AS:9100D-certified manufacturer specializing in millimeter-wave and radio frequency (RF) technology. The company designs and manufactures high-performance electronic components and subsystems for communication, scientific, and test applications, serving established and emerging markets across the commercial, scientific, and defense sectors, including aerospace and space flight hardware.

Ntrepid develops managed-attribution and attribution-intelligence technologies for government, national-security, law-enforcement, and defense organizations. Its platform brings together secure network routing, physical and virtual devices, workspaces, oversight, AI capabilities, analytics, and automation to support complex cyber operations, intelligence collection, and OSINT. The company emphasizes data security, privacy, auditing, and discreet, scalable online mission support for advanced missions across sensitive operational environments.

Turion Space is building the infrastructure to secure and sustain the future of space. Founded to address the growing need for space domain awareness, in-space servicing, and debris mitigation, Turion designs, builds, and operates spacecraft with real-world operational capability. Our vehicles are built for national security and commercial missions that require speed, autonomy, and resilience. We believe the next chapter of...