15.ai is described as 'Or 15.dev, is a free non-commercial web application and research project that uses artificial intelligence to generate text-to-speech voices of fictional characters from popular media' and is a Text to Speech service in the ai tools & services category. There are more than 25 alternatives to 15.ai, not only websites but also apps for a variety of platforms, including Windows, Android, Linux and Mac apps. The best 15.ai alternative is ElevenLabs, which is free. Other great sites and apps similar to 15.ai are SherpaTTS , Balabolka, NaturalReader and Kokoro.