Ons Jabeur signed a sponsorship deal with Kayanee in January 2024, becoming the first professional tennis player to be outfitted by a Saudi brand. Kayanee designed an exclusive tennis line for Ons Jabeur, which she debuted at the Australian Open that month.

Ons Jabeur was sponsored by Lotto Sport Italia from 2016 until early 2024, during which she wore their apparel and represented the brand in various tournaments. WHP Global and Lotto Sport Italia congratulated her on her impressive run to the Women's Singles Final at the 2022 US Open.

Ons Jabeur signed a sponsorship agreement with Qatar Airways in December 2020, which features the airline's logo on her clothing during major tennis tournaments in 2021.

Ons Jabeur joined ASICS' global roster of tennis athletes in May 2024, and she proudly represents the brand's values on and off the court.

Ons Jabeur was appointed as a Global Goodwill Ambassador for World Food Programme (WFP) in February 2024 to raise awareness about global food insecurity and support WFP's mission to end hunger.