Rebellion Defense vs Maximus
Side-by-side comparison of AI visibility scores, market position, and capabilities
AI-native defense software startup building autonomous mission platforms for the U.S. military and allies. Raised $224M+ total; $1B valuation at Series B in 2021.
About
Rebellion Defense is a Washington, D.C.-based AI and machine learning software company founded in 2019 by former U.S. government officials and defense tech engineers. The company builds mission-focused AI products for national security customers, with a product suite spanning Iris (predictive threat analytics), SECURE (cyber vulnerability assessment), Dispatch (autonomous mission planning), and Nova (defense analysis and decision support).\n\nRebellion's SensorOS platform provides defense customers with a fused operational picture of the threat environment, automated orchestration across distributed hardware and software, and AI-driven decision support for warfighters. Iris is designated an awardable vendor on the DoD's Tradewinds Solutions Marketplace, enabling streamlined government acquisition. In April 2025 the company expanded a U.S. Navy contract for target recognition enhancement.\n\nWith 200–500 employees across offices in Washington D.C., Seattle, and London, Rebellion represents a generation of defense tech startups aiming to bring Silicon Valley engineering velocity to national security missions. The company is positioned as a software-first counterpart to hardware-focused peers such as Anduril, targeting command, control, and intelligence automation at every echelon.
Leading government BPO and program administration firm. $5.43B FY2025 revenue. Runs Medicaid, Medicare, unemployment, and social-program eligibility for federal and state agencies globally.
About
Maximus is a global government services company founded in 1975 and headquartered in Tysons, Virginia. Trading on the NYSE (ticker: MMS), Maximus reported fiscal year 2025 revenue of $5.43 billion, up 2.4% year-over-year, providing outsourced business process management, program administration, and digital services to federal, state, and local government agencies across health, employment, student loans, and social assistance programs.\n\nThe company's services include eligibility determinations for Medicare, Medicaid, CHIP, and marketplace health insurance, unemployment insurance program administration, workforce development, tax credits processing, and benefits enrollment. Maximus operates in the United States, Australia, Canada, and the United Kingdom, processing millions of citizen interactions annually. Key technology capabilities include AI-powered contact center solutions, robotic process automation for claims adjudication, and digital intake platforms.\n\nMaximus has been expanding its digital technology portfolio to automate manual workflows in government programs, reduce fraud and improper payments, and improve citizen experience through omnichannel service delivery. The company plays a critical role administering large-scale healthcare and benefit programs, including the federal Marketplace enrollment support contract and state Medicaid eligibility operations. FY2026 revenue guidance is $5.225–$5.425 billion.
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