Haystack is a Python-based AI orchestration framework that structures AI workloads as directed pipelines of composable components (retrievers, generators, rankers, routers, etc.). Pipelines are serializable (YAML/JSON), cloud-agnostic, and Kubernetes-ready, supporting complex patterns like branching, looping, and self-correction for agentic workflows. It integrates natively with leading LLM providers (OpenAI, Anthropic, Mistral, Hugging Face) and vector stores (Weaviate, Pinecone, Elasticsearch) via a standardized interface, and supports Jinja-2 templating for prompt engineering. An enterprise platform layer adds a visual pipeline designer, secure access controls, auditability, and on-prem or cloud deployment options.