Line is a modern voice agent development platform designed to simplify the creation of advanced voice agents by using a code-first approach, enabling developers to address challenges such as maintaining natural conversations and managing infrastructure scalability. Line integrates with Cartesia's advanced speech models, Sonic and Ink, which offer ultra-low latency and high accuracy, ensuring seamless performance for millions of calls. The platform provides developers with tools like the Line SDK, CLI, and GitHub integrations to accelerate the iterative development process, allowing for rapid deployment and testing of voice agents. Line's infrastructure supports extensive customization, including on-premise deployments and model fine-tuning, making it suitable for both small developers and large enterprises. As part of its launch, Line offers prepaid subscription benefits to encourage widespread adoption, aiming to democratize access to cutting-edge voice AI technology and enhance the overall voice agent experience.