Testcontainers is an open-source framework that streamlines the development of AI-powered applications by providing lightweight, modular instances of databases, browsers, message brokers, and other pre-configured dependencies that can run in a container. This reduces the operational cost of projects while encouraging experimentation and facilitating streamlined development. Testcontainers also enhances productivity by simplifying the integration of AI components within applications, allowing developers to easily make LLM calls from within the code and automating the deployment of AI models.