Secure and real-time communication has become essential for both personal and professional interactions. This project aims to develop a modern messaging application using Next.js for a responsive front-end framework, Socket.io for real-time bidirectional communication, and ZEGOCLOUD to enable high-quality voice and video calling capabilities. The app will be designed to provide seamless text, audio, and video communication while maintaining a focus on user experience and cross-platform compatibility. To ensure real-time messaging, Socket.io will be used to implement low-latency and event-driven communication between users. This enables features such as instant message delivery, typing indicators, online/offline presence, and delivery receipts. The voice and video calling functionality will be integrated using ZEGOCLOUD’s SDK, allowing peer-to-peer connections with minimal delay and support for multiple participants. All communications will be encrypted in transit using secure protocols like HTTPS and WebRTC encryption to protect user data. Security is at the core of this project. The app will implement end-to-end encryption (E2EE) for messages, user authentication via JWT (JSON Web Tokens), and role-based access controls to guard against unauthorized access. Additional features like two-factor authentication (2FA), data sanitization, and protection from common attacks (such as XSS, CSRF, and SQL injection) will be incorporated. By leveraging modern frameworks and best practices in both frontend and backend development, this app will provide users with a highly secure, scalable, and feature-rich messaging platform.