BrightonSEO is marketed as the world's largest conference, drawing over 5000 attendees. Thousands of people will flock to the seaside location. The conference has been such a hit that the "BrightonSEO" brand has branched out to the United States, with the San Diego edition held from September 23-24, 2025. The main event in Brighton will be the second flagship conference of the year, with the first held in April.