Top 17 Cyberdefense startups

Sep 11, 2025 | By Bruce Makowsky

These are companies that have contracts with Defense or Military organizations to cyber protect their operations.
1
Country: USA | Funding: $180.5M
Shift5 is a cybersecurity company that provides hardware and software solutions to defend operational technology (OT) platforms.
2
Country: USA | Funding: $3.7B
Northrop Grumman designs, develops, builds and supports some of the world’s most advanced military products.
3
Country: USA | Funding: $3.2M
Developer of the air defense systems (Patriot), missile systems (Tomahawk), man-portable air-defense systems Stinger.
4
Country: USA | Funding: $3B
Booz Allen delivers tomorrow’s technologies at the heart of the defense mission: Multidomain integration for command and control, Immersive training analytics solutions, Geopolitical analysis to anticipate risks, local storage syber defense solution.
5
Country: USA | Funding: $62M
Lockheed Martin is a security company that engages in the research, development, and manufacture of technology systems and products, including HIMARS, ATACMS, BLACK HAWK Helicopter, F-16 Fighting Falcon.
6
Country: USA | Funding: $975M
SandboxAQ developing practical AI and quantum tech solutions that address the security of US Defense global communications infrastructure.
7
Country: UK | Funding: $142.2M
BAE Systems designs, develops, and supports defense and aerospace systems used in the air, on land, at sea, and in space.
8
Country: USA | Funding: $107M
QOMPLX' Identity Threat Detection and Response (ITDR) solution continuously validates to prevent network takeovers.
9
Country: USA | Funding: $79M
Recorded Future develops a single intelligence platform that empowers security teams with real-time alerting and insights into geopolitical events allowing to address the risks immediately.
10
Country: Netherlands | Funding: €65.4M
EclecticIQ offers its threat intelligence, hunting and response technology for governmental purposes to help organisations and governments hunt for, detect and respond to cyber risks that threaten their operations.
11
Country: USA | Funding: $35.5M
Defense Unicorns is a software startup that provides open-source software and AI capabilities for National Security systems.
12
Country: USA | Funding: $32.8M
DeNexus provides a full stack solution for OT cyber risk quantification and management.
13
Country: UK | Funding: $300K
Sense Defence develops Next Generation Web Security Platform
14
Country: USA
Fearlessly solving the world's most complex challenges to keep people safe and secure.
15
Country: Slovakia
Decent Cybersecurity provides cutting-edge, quantum-resistant cybersecurity solutions that protect vital information and assets, ensuring peace of mind in an age where digital threats are ever-present and increasingly sophisticated.
16
Country: USA
GovSky builds a cybersecurity compliance software platform for defense contractors.
17
Country: USA
ARMS Cyber provides cybersecurity defense solutions for organizations.
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Editor: Bruce Makowsky
Bruce Makowsky has covered military, cyber and IT news since 2009, with a focus on U.S. Navy and Marine Corps operations, acquisition programs and budgets. In particular he worked for Inside Defense. Bruce holds a Master of Science degree in journalism from Boston University. Bruce is also an award-winning photographer, renowned for his captivating images that have earned him numerous accolades and widespread recognition in the photography community. You can contact Bruce at makowsky(at)militarystartups(dot)com