REBELLION DEFENSE

The founding story is very DC. Trae Stephens was a Partner at Founders Fund (Peter Thiel's venture firm) who had spent years as a defense contractor before turning VC.

Chris Lynch had just finished a stint running the Defense Digital Service — a team of Silicon Valley technologists embedded inside the Pentagon to modernize military software. Both had seen up close how far the US military's software capabilities lagged behind commercial technology and what was theoretically possible with modern machine learning.

They started Rebellion in 2019 with a thesis: national security doesn't need more hardware, it needs better software. They focused on decision support tools, data analysis, and AI systems that help human operators process information faster and make better decisions under pressure.

Rebellion Defense sold software to US government clients — primarily the Department of Defense, Air Force Research Laboratory, and intelligence community. The contracts were typically government procurement deals: fixed-price or cost-plus contracts for software development and deployment.

Unlike defense hardware businesses that depend on multi-decade platform programs, software contracts can move faster and iterate more quickly. Revenue came from both development contracts (building custom AI tools for specific military needs) and licensing (ongoing deployment of Rebellion's platforms).

The company never disclosed exact revenue figures, but the $150 million Series B raised in 2021 implied strong traction with government clients.

Rebellion's flagship product was a suite of AI-powered decision support and data analysis tools designed for defense operators. This included systems for intelligence analysis (processing large volumes of sensor and signals data faster than human analysts), targeting decision support, and operational planning assistance.

The company built custom AI tools for specific Air Force and DoD programs under contract. Post-merger with Shield AI, Rebellion's software capabilities have been integrated with Shield AI's Hivemind platform — an autonomous AI pilot system that flies unmanned aircraft without GPS or communications links.

The founders used their network deliberately. Trae Stephens had deep connections in the defense tech investor community through Founders Fund.

Chris Lynch had direct relationships at the DoD from his Defense Digital Service years. The company was able to move through government procurement faster than most defense startups because the founders knew exactly how the system worked and who the decision-makers were.

They also benefited from a broader shift in government policy: after years of watching commercial AI development outpace military AI, the Pentagon began actively funding startups through AFWERX, DIU (Defense Innovation Unit), and DARPA programs. Rebellion positioned itself as the serious software partner for that shift.

Government procurement is a notoriously slow and complex sales cycle — even for well-connected founders. Defense software companies also face a specific credibility challenge: military operators need to trust AI systems with high-stakes decisions, and building that trust requires patient, iterative deployment rather than the fast sales cycles of enterprise SaaS.

The merger with Shield AI was partly a response to these constraints: a larger, combined entity with both software and autonomous hardware capabilities is easier to sell into large defense programs than a pure-software startup. Competing with Anduril, Palantir, and the incumbents (Lockheed, Raytheon) required scale that was hard to achieve independently.

Rebellion raised a $15 million Series A led by Founders Fund in 2019. The $150 million Series B in 2021 was led by NEA, with participation from Founders Fund and other investors.

In-Q-Tel (the CIA's strategic investment arm) was also a reported investor, which is significant — it indicates the intelligence community saw strategic value in Rebellion's capabilities. In September 2023, Rebellion merged with Shield AI.

The deal was structured as a stock-for-stock merger, creating a combined defense AI company backed by Andreessen Horowitz, Snowflake's Frank Slootman, and other prominent investors in Shield AI's cap table.