Chatterbox-TTS-Server is a free, open-source alternative to Play.ht. It can be used without subscription fees — and its source code is open for anyone to inspect, modify and self-host.
Self-host the powerful Chatterbox TTS model. This server offers a user-friendly Web UI, flexible API endpoints (incl. OpenAI compatible), predefined voices, voice cloning, and large audiobook-scale text processing. Runs accelerated on NVIDIA (CUDA), AMD (ROCm) Its license (MIT) is permissive: free to use, modify and redistribute — including inside commercial and proprietary products.