OpenStar
| Industry | Energy | 
|---|---|
| Founded | 2021 | 
| Founder | Ratu Mataira | 
| Headquarters | , New Zealand | 
| Number of employees | 55 (2025) | 
| Website | openstar | 
OpenStar Technologies is a company based in Wellington, New Zealand, that is developing a nuclear fusion reactor. It aims to develop a reactor capable of supplying electricity to the grid by the 2030s. While research has been conducted on fusion power for decades, no company has ever made one capable of supplying electricity on a commercial scale. Worldwide, there are about 45 companies developing nuclear fusion reactors.