Finnish microreactor startup SEATOM joins NATO accelerator program
Finnish deep-tech startup SEATOM Technologies, specializing in modular micro-nuclear reactors for maritime and extreme environments, has been selected for the DIANA 2026 challenge program—the NATO innovation accelerator for alliance countries.
SEATOM is among approximately 150 companies from 24 countries that will participate in the Defence Innovation Accelerator for the North Atlantic (DIANA), working on dual-use technologies capable of addressing critical defense and security challenges, including energy systems, autonomous platforms, and resilient infrastructure in harsh conditions.

As part of DIANA, the startup will take part in a six-month core program together with the DualTech accelerator in Turin (Italy), gain access to a network of experts, mentors, and testing facilities across NATO countries, and receive initial contract funding of €100,000, with the possibility of additional financing for testing, evaluation, and validation.
Beyond financial support, SEATOM will gain a unique opportunity to conduct trials and operational experiments alongside allied armed forces, significantly accelerating the technological readiness of its solutions and expanding contacts with potential government customers.
According to co-founder and co-chairman Ruoppe Marttila, nuclear energy is now coming to the forefront precisely as a strategic technology for maritime autonomy and operations in extreme environments, as government regulation and public perception shift toward supporting such solutions.
The DIANA program will begin on January 19, 2026, with aninternational demonstration day for participants scheduled in Paris inJune 2026, where SEATOM will present the progress of its developments to key players in the defense market. World Nuclear News
Official company website: seatomtech.com

