S&t Slovenija is Grs Door & Window Ubc's biggest rival. S&t Slovenija was founded in 1991, and is headquartered in , . S&t Slovenija competes in the industry. S&t Slovenija generates $ less revenue vs. Grs Door & Window Ubc.

Src, SI is one of Grs Door & Window Ubc's top competitors. Src, SI's headquarters is in Ljubljana, Ljubljana, and was founded in null. Src, SI operates in the industry. Src, SI generates NaN% of Grs Door & Window Ubc's revenue.

Adacta is seen as one of Grs Door & Window Ubc's top competitors. Adacta is a Private company that was founded in 1989 in Ljubljana, Other. Adacta is in the Application Software field. Compared to Grs Door & Window Ubc, Adacta has 800 more employees.