Dopplio is a tool for creating automated, AI-personalized videos at scale. It is designed for various professionals such as recruiters, coaches and those aiming to generate leads. The primary function of Dopplio is to allow customization of videos by personalizing spoken words and backgrounds to reach more prospects more effectively. Users begin by recording a base video which serves as a template. They can then specify particular background images and input desired greetings. Dopplio employs artificial intelligence to simulate the user's voice delivering these personalized greetings. The tool then generates individualized videos using the originally recorded template, the specified backgrounds, and AI-generated personal greetings. This results in improved reach and enhanced audience engagement, making the experience personalised for each user or prospect. Dopplio is suitable for operations of any scale, from small businesses to large enterprises, catering to different levels of video generation capacity, user numbers, and template volumes. The creation of videos can be delegated to team members, optimizing the use of resources and time. Clients' feedback suggests that Dopplio's personalization through automation helps increase response rates compared to traditional text outreach.