MeloTTS

MeloTTS, developed by MyShell.ai, is a high-performance, open-weights text-to-speech library designed to overcome the latency and hardware bottlenecks of traditional transformer-based TTS models. Built on an optimized end-to-end VITS (Variational Inference with adversarial learning) architecture, MeloTTS is uniquely engineered for high-speed CPU inference without sacrificing phonetic accuracy or prosody. As of 2026, it is recognized for its exceptional real-time factor (RTF), making it the preferred choice for developers building interactive applications that require localized, low-latency speech synthesis. The library natively supports a wide array of languages including English, Spanish, French, Chinese, Japanese, and Korean, each with high-quality, natural-sounding base voices. Its architectural efficiency allows it to run on consumer-grade hardware and edge devices, providing a privacy-focused alternative to cloud-based TTS providers like ElevenLabs or Google Cloud TTS. By open-sourcing the model under the MIT license, MyShell has enabled a robust ecosystem of self-hosted integrations, ranging from real-time translation tools to accessibility-focused screen readers, positioning MeloTTS as a critical component in the 2026 decentralized AI stack.