Rebellion Defense

Rebellion Defense

AI-powered defense software for national security

About Rebellion Defense

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

Industries

Government & Public Sector

Cybersecurity

AI & Machine Learning

Defense

Company Size

11-50

Company Stage

Series B

Total Funding

$221.3M

Headquarters

Washington DC, District of Columbia

Founded

2019

Overview

Rebellion Defense creates software for defense and national security, using AI-powered tools to help U.S. and allied agencies make better, quicker decisions in critical missions. The products ingest data from multiple sources, analyze it, and present actionable intelligence to support military and security personnel. Its team blends private-sector technologists with veterans and national security experts, prioritizing transparency, empathy, and ethical AI in its practices. The goal is to become the go-to AI suite for national defense and security, delivering practical tools that protect nations and their allies.

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Simplify's Take

What believers are saying

  • U.S. defense AI funding surged 20% to $5.2B in 2025.
  • GSA MAS contract awarded in 41 days accelerates AI procurement.
  • JADC2 awards $2.8B for agile software in FY2026 multi-domain ops.

What critics are saying

  • Founder departures shuttered UK arm, eroding expertise.
  • Samsung $124M Rebel chip faces delays and overruns in 12-24 months.
  • Palantir displaces Rebellion via deeper DoD ties in 12-24 months.

What makes Rebellion Defense unique

  • Iris software enhances Navy target recognition in Red Sea operations.
  • Nova provides IL5-authorized automated testing for Air Force Cloud One.
  • SensorOS fuses 40+ feeds into authoritative tracks for defense infrastructure.

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Funding

Total Funding

$221.3M

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
Linktree
$65M
Substack
$100M
ClickUp
$150M
Rebellion Defense

Growth & Insights and Company News

Headcount

6 month growth

2%

1 year growth

2%

2 year growth

-12%
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

Defense and Munitions
Feb 2nd, 2024
Rebellion Nova earns Impact Level 5 Provisional Authorization to test Department of Defense networks

Rebellion Defense, a leading U.S. defense software and services company, received an Impact Level 5 (IL5) Provisional Authorization (PA) from the United States Department of Defense (DoD) for Rebellion Nova, enabling the DoD and defense-affiliated agencies to deploy the threat emulation software faster.

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