Venture capital firm Angel One Fund has announced its 14th investment deal over the past two and a half years, backing Ukrainian defence tech startup Vigilant Works, a developer of counter-drone technologies. The transaction marks the fund’s fourth investment in the defence sector since the beginning of 2026.
The investment amount has not been disclosed. However, the fund stated that it falls within its standard investment ticket of up to USD 200,000. The company will use the funding to further develop autonomous control technologies, create proprietary radar solutions, and scale its operations.
Vigilant Works’ flagship product is an autonomous Counter-UAS system. The solution is built around the Algiz-1 interceptor drone, which has already undergone combat testing and demonstrated its effectiveness under real-world conditions.
The team is currently developing the next generation of the system, Algiz-2. The upgraded interceptor is expected to reach speeds exceeding 600 km/h, significantly expanding its ability to neutralise high-speed aerial targets. The development of Algiz-2 is also supported by grant funding.
Ivan Petrenko, CEO of Angel One Fund, said the fund is focused on technologies capable of addressing critical constraints in modern warfare. According to him, Vigilant Works’ solutions can transform counter-drone operations from a reactive response to a fully autonomous process, from target detection to neutralisation.
Angel One has not yet disclosed its previous investment transaction, which was completed in June 2026.
Angel One Fund was established in 2022 with the support of the Ukrainian Catholic University Foundation. The fund was launched with initial capital of USD 1.5 million and specialises in investing in Ukrainian technology startups and supporting the development of the national startup ecosystem. In spring 2026, the fund raised approximately USD 3 million in additional capital to expand its investment activities. According to managing partner Ivan Petrenko, Angel One has invested around USD 4 million in promising Ukrainian projects since its establishment.
By the end of 2026, the fund plans to finance another 12 startups while maintaining a maximum investment size of USD 200,000 per transaction.
Vigilant Works is also a member of the Brave1 cluster, a government-backed platform that brings together participants in Ukraine’s defence tech ecosystem and supports the development of innovative defence technologies. The company is developing proprietary solutions in autonomy and radar technologies and was previously selected for the joint Brave1 / Ministry of Defense EU4UA programme, implemented with the support of BRDO.
