The U.S. open-source intelligence market size is projected to reach USD 3,149.0 million in 2025 and is expected to grow to USD 18,127.5 million by 2034, registering a CAGR of 21.5%. Growth is driven by increasing cybersecurity threats, rising demand for real-time threat intelligence, expanding use of social media and data analytics, and strong government and defense investments in intelligence and surveillance technologies.