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Rebellion Defense

Sensing and response platforms for defense

Overview

Rebellion Defense builds sensing and response platforms to protect critical assets and infrastructure. Its flagship system, RBLN-OS, combines sensing, AI-driven track fusion, and response tools to detect and counter threats around a asset. The platform uses components like the ARGUS miniature multi-band AESA radar and the IRIS AI-enabled mission awareness to provide real-time threat detection and mitigation for customers such as the US Navy, US Air Force, and allied defense ministries. The company differentiates itself by offering an integrated defense platform that blends radar, AI, and sensor fusion tailored to national security and critical infrastructure protection, with a customer base that includes government programs and defense ministries. Its goal is to help protect critical infrastructure and national security by sensing threats (such as drones, weather hazards, and maritime changes) and providing tools to respond effectively.

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About Rebellion Defense

Simplify's Rating
Why Rebellion Defense is rated
C
Rated B on Competitive Edge
Rated C on Growth Potential
Rated D+ on Differentiation

Industries

Data & AnalyticsGovernment & Public SectorAI & Machine LearningDefense

Company Size

11-50

Company Stage

Series B

Total Funding

$224.3M

Headquarters

Washington DC, District of Columbia

Founded

2019

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Simplify's Take

What believers are saying

  • April 2025 Navy contract expansion extended Iris work fourteen months onto two ships.
  • February 2025 Tradewinds awardable status accelerates DoD procurement for Iris.
  • October 2026 website updates and January 2026 roadmap coverage signal active market presence.

What critics are saying

  • November 2025 cuts 90 employees, signaling runway pressure and product retrenchment.
  • Public leadership confusion between Ben FitzGerald and Shu Chowdhury weakens investor and buyer confidence.
  • Navy prototype dependence creates existential risk if 2026 ship tests underperform or slip.

What makes Rebellion Defense unique

  • ARGUS, IRIS, and RBLN-OS fuse sensing and response for contested defense environments.
  • GSA MAS and Tradewinds approvals shorten federal buying cycles for Rebellion’s software.
  • IL5 authorization and Navy integrations create procurement and deployment moats.

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Funding

Total Funding

$224.3M

Above

Industry Average

Funded Over

4 Rounds

Series B funding is typically for startups that have proven their business model and need more funding to expand rapidly—often by entering new markets or adding more products. Investors are usually venture capital firms that specialize in later-stage investments.
Series B Funding Comparison
Above Average

Industry standards

$35M
$45M
$65M
$100M
$150M

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

-2%
SBIR.gov
Sep 13th, 2026
Awards | SBIR

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Business Wire
May 1st, 2024
Rebellion Defense Wins Competitive U.S. Navy Contract To Enhance Target Recognition

WASHINGTON--(BUSINESS WIRE)--Rebellion Defense, a leading U.S. defense software company, today announced a new contract with the U.S. Navy. Rebellion will provide its Iris software to Sailors to enhance target recognition and tracking capabilities. From drone strikes in the Red Sea to freedom of navigation operations in the South China Sea, the Navy today must navigate an increasingly complex global security landscape. This contract, which was awarded competitively by the U.S

Business Wire
Apr 29th, 2024
U.S. Air Force Cloud One Selects Rebellion Defense To Strengthen Cyber Resilience Of Mission Applications

WASHINGTON--(BUSINESS WIRE)--Rebellion Defense, the technology company building software to outpace national security threats, today announced it has been awarded a subcontract for Rebellion Nova to deliver continuous, automated testing for web applications hosted by the U.S. Air Force’s Cloud One enterprise cloud platform. “Cloud One is a leader in enabling the U.S. Department of Defense with commercial enterprise cloud offerings to deliver modern capabilities to the Air Force,” said Ben FitzGerald, Chief Executive Officer at Rebellion Defense. “We’re excited for Nova to play a key part in securing their applications to protect our warfighters’ missions.”. Under this contract, Rebellion will deliver on-demand, continuous application testing with its Rebellion Nova software product to identify actionable security insights during the software development process to incorporate cyber resilience at the start of an application’s lifecycle

Business Wire
Mar 27th, 2024
Rebellion Defense Software Products And Services Now Available Via Gsa Multiple Award Schedule

WASHINGTON--(BUSINESS WIRE)--Rebellion Defense, a leading U.S. defense software and services company, proudly announces it was awarded a Multiple Award Schedule (MAS) contract by the General Services Administration (GSA) in an unprecedented 41 days, marking a significant milestone in the company’s journey.Rebellion Defense underwent rigorous vetting, from technical assessments to past performance validation, culminating in a remarkable achievement for a four-year-old start-up. “Exceptional” performance reviews and close collaboration with the government contributed to the rapid approval, which typically takes three to six months.“As a defense-first company, we prioritize hiring exceptional individuals with deep federal expertise,” said Ben FitzGerald, Chief Executive Officer at Rebellion Defense. “Our team has the know-how to overcome acquisition challenges and operate with urgency. In a world where our adversaries aren’t constrained by red tape, we’re moving fast to equip service members with the best tech today.”Rebellion’s GSA MAS contract empowers government organizations to turn the administration’s recent executive order on artificial intelligence into actionable outcomes by facilitating the acquisition of AI products and services “faster, more cheaply, and more effectively through more rapid and efficient contracting.”“The GSA is working tirelessly to help agencies get fast and efficient access to emerging technologies from innovative small businesses,” said Karen D. Dacres, Chief Legal Officer at Rebellion Defense

Business Wire
Feb 12th, 2024
Rebellion Defense Awarded Contract To Support Us Navy Project Overmatch

WASHINGTON--(BUSINESS WIRE)--Rebellion Defense, a leading U.S. defense software and services company, today announced its partnership with U.S. Navy Project Overmatch. Rebellion Defense will deliver Project Overmatch cutting-edge technology and custom software solutions through its Mission Engineering service offering. With this new partnership, Rebellion Defense will support the U.S. Navy’s need for agile software by integrating its engineers and operators into the fabric of Project Overmatch

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