Mezher cofounded financial advisory platform Sarwa with Mark Chahwan and Jad Sayegh. The company serves more than 80,000 users. Sarwa Trade was released in March 2021 as a zero commission, zero transfer fee, trade podium. In the same year, it raised $15 million in funding from the Mubadala Investment Company, along with contributions by Hambro Perks Oryx Fund, HALA Ventures, and Middle East Venture Partners. The company has raised $25 million in total funding from investors such as KIPCO and California-based 500 Startups.