Star Division
| Company type | Gesellschaft mit beschränkter Haftung | 
|---|---|
| Industry | Computer software | 
| Founded | 1985 in Lüneburg, Germany | 
| Founder | Marco Börries | 
| Defunct | August 5, 2000 | 
| Fate | Acquired by Sun Microsystems | 
| Headquarters | , Germany | 
| Products | StarOffice | 
| Number of employees | 170 (1997) | 
Star Division was a German software company best known for developing StarOffice, a proprietary office suite. The company was founded in 1985 by 16-year-old Marco Börries in Lüneburg, and initially operated as a small startup. Its first product was StarWriter, a word processor that later evolved into the StarOffice suite.
Positioned as a lower-cost alternative to Microsoft Office, StarOffice achieved over 25 million sales worldwide and held an estimated 25% share of the office suite market in Germany by the late 1990s. In 1998, Star Division made the software freely available for private use. The following year, on 5 August 1999, the company was acquired by Sun Microsystems for US$59.5 million, reportedly because acquiring the company was more cost-effective than licensing Microsoft Office for its employees.
Sun subsequently released StarOffice 5.1a free for commercial use and later open-sourced the software as OpenOffice.org, which served as the basis for related projects such as LibreOffice. Sun was acquired by Oracle Corporation in 2010.