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Comment on: Lightning V3

by [REDACTED]
Posted: Mar 9, 2026
Hey Product Hunt! Lightning V3 delivers 100ms latency at 20 concurrent requests. That's real-time voice AI that actually scales. In blind listening tests, listeners preferred it over OpenAI's GPT-4o-mini-TTS 76.2% of the time, with a WVMOS score of 3.98.But speed means nothing if it sounds robotic. Lightning V3 scores 3.33/5 on intonation and 3.07/5 on prosody; meaning it doesn't just read text, it speaks with natural rhythm, pauses, and expression. The kind of voice your users won't realize is AI.It supports 15+ languages with more being added regularly (Indic & European languages included). It handles voice cloning from just 5-15 seconds of audio, and gives you flexible streaming via HTTP, SSE, or WebSocket. Whatever fits your stack.We built this for developers shipping voice assistants, conversational AI, IVR systems, customer support bots, and anything that needs immediate, human-sounding voice feedback. Whether you're a solo builder or an enterprise team, the API is simple and the docs are solid.We've been heads down on this for a while and we're genuinely proud of where V3 lands. Would love for you to try it and tell us what you think!
About this Product
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Text-to-Speech built for Voice Agents