Jean-Aniel Eclesiaste Assi (born August 12, 2004) is a professional soccer player who plays as a winger for Atlético Ottawa in the Canadian Premier League. Born in the Ivory Coast, he represented Canada at youth level.

Born in Adzopé, Ivory Coast, in 2004, Assi moved to Canada at age 10. He began playing youth soccer in Canada with ASM LaSalle, before joining Royal-Sélect de Beauport. In 2017, he joined the Montreal Impact Academy. In 2020, he took part in the pre-season training camp with the first team, when he was only fifteen.

In December 2020, Assi signed his first homegrown contract with Montreal Impact (later renamed CF Montréal for the 2021 season). Assi made his professional debut with Montreal Impact in a 1-0 CONCACAF Champions League win over C.D. Olimpia on December 15, 2020, becoming the youngest ever player to play for the club at the age of 16 years and 125 days.

In March 2022, Assi went on a one-year loan with Canadian Premier League side Cavalry FC. In February 2023, he went on loan with Atlético Ottawa. On July 12, 2023, he scored his first professional goal in a 2-0 victory for Atlético Ottawa over his former side Cavalry FC. Upon completion of the 2023 season, CF Montréal would announce that they would not pick up Assi's contract for 2024, ending his time with the club.

In January 2024, Assi joined Crown Legacy FC, the MLS Next Pro affiliate of Charlotte FC.

In October 2024, Assi signed with Marbella in the Spanish third tier Primera Federación until June 2026.

In February 2025, he moved to Alcorcón B in the Spanish fifth tier Tercera Federación.

In September 2025, he signed with Atlético Ottawa in the Canadian Premier League, whom he had previously played on loan with, through the 2027 season, with an option for 2028.