Conversational AI is transforming how humans interact with technology. From virtual assistants and AI-powered contact centers to real-time translation and accessibility tools, voice-first interfaces are rapidly becoming the default mode of interaction for millions of users worldwide.
Yet delivering a truly natural voice experience remains one of the hardest challenges in AI infrastructure. Users expect human-like responsiveness. Excess latency can break conversational flow and erode trust. To feel natural, AI-generated speech must arrive within the same temporal window as human turn-taking.
This post introduces how Cartesia, an AWS Partner specializing in real-time voice AI, uses purpose-built State Space Models (SSMs) and AWS infrastructure to deliver sub-100ms text-to-speech and speech-to-text at global scale. Developers can build voice experiences that feel indistinguishable from human conversation.
