In 2025, the proliferation of agentic workflows and large language models (LLMs) has transformed various industries, necessitating advanced tools for prompt testing and optimization. The text outlines several platforms developed to enhance the performance and management of AI agents, including Arize AX, Arize Phoenix, DSPy, Fiddler AI, Helicone, PromptLayer, Prompthub, and Promptmetheus. These tools offer features such as observability, versioning, testing, and scalability, catering to the needs of AI-first engineers and product managers. The platforms vary in their focus, with some prioritizing enterprise-grade governance, while others emphasize community-driven collaboration or modular prompt composition. As the AI landscape continues to evolve, selecting the right tool depends on the specific requirements of the user, such as deployment needs, integration capabilities, and the level of automation desired.