Ukrainian drone autonomy startup The Fourth Law secures strategic investment from US corporation Axon Enterprise

Ukrainian defence tech startup The Fourth Law (TFL), founded by Yaroslav Azhnyuk, has secured a strategic investment from US corporation Axon Enterprise. The amount was not disclosed. The funding will accelerate the development of AI-powered drone autonomy in Ukraine, the company said in a press release.

Defender Media looks at what is known about the deal and what TFL is building.

About the deal

Axon Enterprise is a US public safety technology group headquartered in Scottsdale, Arizona. The company develops hardware and software solutions for law enforcement and public safety agencies. Axon is listed on NASDAQ, with a market capitalisation of $33.9 billion as of 13 February.

Azhnyuk assumes Axon is the most prominent investor to back a Ukrainian defence tech company to date. “The funding will go toward R&D on new autonomy capabilities required to protect cities and critical infrastructure from Shahed-type attacks,” he said.

Axon Founder and CEO Rick Smith noted that Ukraine is innovating drone technology at a pace most of the world isn’t built to match. “Teams like The Fourth Law are developing autonomy under real battlefield constraints, where systems are built, tested, and improved in real time,” he said, adding that such work will generate more world-class solutions in drone development and deployment.

TFL is Axon’s second investment in Ukraine. Last week, Defender Media reported that Axon led the seed round of Farsight Vision.

Azhniuk said he first connected with Axon through the state defence tech cluster Brave1.

“After Rick Smith met Mykhailo Fedorov, Brave1 introduced our teams and supported the process that led to this investment. It’s a good example of how the defence innovation ecosystem BRAVE1 has built in Ukraine is designed to work,” he said.

Fedorov commented that autonomy technologies increase precision, accelerate decision-making and save soldiers’ lives. He described the partnership between The Fourth Law and Axon as proof that Ukrainian defence tech companies are becoming global players shaping the future of security.

What The Fourth Law is building

The Fourth Law is an AI and robotics company developing solutions for defence and public safety. Its flagship products — the Lupynis-10-TFL-1 UAV and the TFL-1 autonomy module — are used by more than 50 Ukrainian military units across different sectors of the front.

The company says its solutions increase FPV drone mission success rates two to four times, while raising unit cost by only around 10%.

Its latest product, TFL-AntiShahed, is an interceptor drone module that uses on-the-edge AI to detect and illuminate Shahed-type attack drones significantly faster than the human eye. The system autonomously identifies drones in thermal imagery by analysing motion patterns, heat signatures and other parameters using AI, the company says.

TFL’s autonomy technology is designed for cross-platform integration. In addition to its own Lupynis-10 UAV, the company’s AI modules have been integrated by dozens of other drone manufacturers. The modules can be installed on third-party platforms, work with different ground control stations and operate across various communications systems.

Last week, Defender Media reported that around 200 vacancies are currently open at Yaroslav Azhnyuk’s companies, The Fourth Law and Odd Systems.