Chatterbox is a family of state-of-the-art open-source TTS models by Resemble AI in 2026, featuring zero-shot voice cloning, expressive emotion control, paralinguistic tags, and multilingual support (23+ languages). With ultra-low latency (sub-200ms in Turbo), built-in PerTh watermarking for responsible AI, and MIT license, it outperforms many closed-source alternatives like ElevenLabs in blind tests—ideal for developers, voice agents, games, audiobooks, and creative applications.