Agenta is a comprehensive open-source LLMOps platform that provides developers with a complete toolkit for building, managing, and optimizing LLM applications. The platform combines essential LLM development tools including a customizable playground, prompt management system, evaluation framework, and observability features all in one unified interface. The platform's core strength lies in its ability to transform existing code into interactive playgrounds where developers can experiment with different prompts, parameters, and configurations. This approach enables rapid iteration and testing without requiring code changes, making it ideal for prompt engineering and application refinement. Agenta empowers both technical and non-technical team members through its web-based interface that allows domain experts to engineer and deploy prompts without needing to write code. The platform includes robust version control for prompts and their outputs, enabling teams to track changes, compare performance, and maintain consistency across different iterations. The evaluation and observability features provide comprehensive insights into LLM application performance, helping teams identify bottlenecks, monitor quality metrics, and ensure reliable operation in production environments. As an open-source solution, Agenta offers transparency, customization flexibility, and community-driven development while avoiding vendor lock-in concerns.