15.ai, an AI text-to-speech platform, gained popularity for creating realistic voice clones of various characters using advanced technologies like deep learning and sentiment analysis. Developed by an anonymous MIT researcher and launched in 2020, it quickly became a go-to tool for generating natural-sounding AI voices. Despite its success, 15.ai was taken offline in September 2022, with no indication of returning, due to issues like copyright and competition. As a result, several alternatives have emerged, with ElevenLabs standing out due to its sophisticated AI voice cloning capabilities, allowing users to create high-quality, expressive voices for diverse applications. These alternatives offer features such as multilingual support, customizable voice settings, and easy integration into various projects, making them valuable tools for creators seeking to enhance their content with AI-generated voices.