Lightning.ai is a platform that enables users to quickly train, deploy and build AI applications with PyTorch. According to the website, the platform provides a comprehensive suite of tools to help users create AI models quickly and efficiently. It offers users the ability to customize their AI models with ease. The platform also claims to provide a fast and efficient way to develop AI applications. Lightning.ai sets itself apart from other competitors by providing a streamlined way to build AI models with PyTorch Lightning. It is suitable for data scientists, developers and researchers who are looking for an efficient way to train and deploy AI models.