Humanloop is a collaborative platform for building and monitoring production-grade applications based on large language models. It offers a comprehensive suite of tools to help developers quickly transition AI from prototype to production, ensuring system reliability. Key features include: Prompt Engineering for iterative and versioned prompts to enhance hit rate; Model Management with support for various models and tracking capabilities; Content Evaluation for collecting feedback and quantitative analysis; and a Collaborative Platform that allows non-technical personnel to participate in AI application development. Typical application scenarios include constructing chatbots, automating customer support, and generating marketing content. Humanloop has been favored by thousands of developers and is used by numerous well-known enterprises.