Exhibit 99.1 ON24 Announces First Quarter 2024 Financial Results • Achieved Total Revenue of $37.7 million and exceeded profitability targets for 4th consecutive quarter • Continued signs of stabilization in customer base driven by positive trends in gross retention • Strong enterprise business performance metrics; including record percentage of ARR in multiyear agreements and highest ARR per customer • Growth ARR uplift from momentum of early adopters of the ON24 next gen platform and AI-powered offerings ...