https://codecanyon.net/item/grupo-pro-chat-room-script/25263116

Group Chat is a Chatroom System for Group Chat & One to One Chat with a world of features designed to boost user engagement on your website. Build Your Own Chat Website in Minutes with Grupo Chat. Grupo Chat supports both WebSocket and AJAX based real-time communication methods. If you’re on shared hosting or your server doesn’t support WebSockets, you can opt for the AJAX-based real-time approach. For WebSocket functionality, we utilize PHP Swoole extension.