Is triple sec and cointreau the same thing?

Triple sec is a category—liqueur made by triple-distilling orange peels and alcohol. Cointreau is a brand in the triple sec category, and a premium one at that. Triple sec tends to be more syrupy and sweet, while cointreau is a bit more balanced.

An alternative to orange liqueur is St-Germain Elderflower Liqueur, which is made using fresh elderflowers. While it won’t imitate the delicious orange flavour, its sweetly delicate, floral notes can add an elegant twist to your cocktails. Pair it with PATRÓN Reposado, cranberry juice and fresh lemon juice to make a PATRÓN Santa Maria.

Is triple sec and cointreau the same thing?