ElevenLabs
State-of-the-art TTS API with voice cloning, multilingual support, and low-latency streaming. Used in podcasts, audiobooks, conversational AI agents, and game NPCs.
LiveKit Agents
Real-time voice agent framework built on LiveKit's WebRTC infrastructure. Handles low-latency audio streaming, voice activity detection, and multi-participant sessions. Strong for production deployments where latency and scalability are critical. 9K+ GitHub stars.