Startup Develops Solutions to Deter Drone Attacks Through Costly Countermeasures

California Start-Up Develops Innovative Air Defense System

By DRONELIFE Features Editor Jim Magill

A California-based start-up, led by a 22-year-old Ukrainian software engineer, is working to introduce a tube-launched, foldable quadcopter counter-UAS system to the U.S. military. The aim is to make future attacks by large drones and missiles economically unfeasible for adversaries.

Yehor Balytskyi, co-founder and CEO of Thermopylae Aerospace, expressed his vision for the technology, stating, “If we can develop an air defense system that is both cost-effective and efficient, then any attack will become obsolete, as it would be economically irrational to spend so much for little gain.”

Company Overview and Product Features

Founded last year and named after the historic Battle of Thermopylae in 480 BC, the company aims to demonstrate how small innovations can lead to significant changes in warfare. Operating from a research and development facility in Hawthorne, California, near SpaceX’s headquarters, Thermopylae has a team of five and focuses on developing its principal product, the SPART.

The SPART system is part of a multi-layered air defense strategy and launches from a pneumatic tube, similar to a recreational potato gun. Balytskyi explained, “It deploys into the air very quickly and goes towards the target. You can take this tube in any vehicle, like a boat, an aircraft, or an unmanned system on the ground.”

Designed for affordability, the system costs approximately $10,000 per launch. The electric-powered interceptor vehicle utilizes thermal guidance to locate its target, achieving speeds of up to 220 mph with a flight duration of up to 20 minutes. If the interceptor fails to reach its target, it is designed for reuse in subsequent launches.

Thermopylae is also developing a comprehensive end-to-end system that will integrate the interceptor, launcher, RF communication, and a command-and-control system compatible with existing radar systems.

While initially intended for military air defense missions, the SPART platform can also serve as a counter-UAS tool to protect critical infrastructure, ensuring the safety of important facilities.

Testing and Future Prospects

Thermopylae is currently undergoing an evaluation process with the U.S. Air Force, expected to last three to four months. This evaluation aims to validate the technology and test its effectiveness. At the conclusion of this period, the company hopes to secure a contract with the Pentagon for the procurement of SPART for use in conflict zones, including the Middle East.

Background of the Founder

Yehor Balytskyi’s journey into the defense industry began in Ukraine, where he developed an interest in software engineering and counter-drone technology, particularly after the Russian annexation of Crimea in 2014. This event significantly influenced his career path.

“I was not a fan of war. I actually opposed it,” Balytskyi noted, reflecting on his desire to find ways to empower smaller nations against larger aggressors. After leaving Ukraine at 17, he spent time in London and worked with various European technology companies before immigrating to the United States in 2025 on a refugee visa.

In the U.S., he co-founded Thermopylae with a team of engineers to create a low-cost, transportable counter-UAS solution capable of neutralizing Group 2 drones, such as the Iranian-produced Shahed, which have been used in conflicts in Ukraine and the Middle East.

Funding and Future Plans

Thermopylae has raised $2.5 million in pre-seed funding, with contributions from notable investors, including Silicon Valley’s Naval Ravikant. Following this funding, the company relocated from a small hardware lab in San Francisco to its current facility in the Los Angeles area.

While the core research and development team will likely remain in Los Angeles, Balytskyi indicated plans to establish a manufacturing base in the U.S., with some supply chain aspects potentially outsourced to allied countries. He expressed pride in contributing to the defense of his adopted country, stating, “The U.S. has provided me the opportunity to grow as an engineer and entrepreneur, and I want to return the effort.”