Exhibit 99.1 Five9 Reports Record Revenue of $286 Million for the Third Quarter Q3 Enterprise AI Revenue Growth of 41$59 Million Announces $150 Million Share Repurchase Program SAN RAMON, Calif. - November 6, 2025 - Five9, Inc. (NASDAQ:FIVN), the Intelligent CX Platform provider, today reported results for the third quarter ended September 30, 2025. Third Quarter 2025 Financial Results "We're pleased with our third quarter results with Enterprise AI revenue growing 41% YoY ...