Caeleb Dressel became an official ambassador for GMX7 in 2021, endorsing their X1-PRO training device used during his Olympic preparations.

Caeleb Dressel joined Speedo USA in July 2018 as a professional swimmer, competing in their Fastskin line and training in the Turnz line. This partnership marked his first endorsement after becoming a professional that year.

Caeleb Dressel earned an endorsement deal with Toyota, which designed a vehicle inspired by his tattoos leading up to the 2020 Summer Olympics.

Caeleb Dressel has signed on to serve with SPIRE Institute & Academy as an International Swim Ambassador since October 2020, where he mentors student athletes and assists in program development.

Caeleb Dressel partnered with deboer in March 2025 to develop premium performance gear for competitive swimming. This partnership aims to leverage his expertise, and deboer expressed excitement about collaborating with the nine-time Olympic gold medalist.