Langflow
Visual builder for AI agents and RAG pipelines — LangChain-powered.
MIT-licensed alternative to Flowise with Python code nodes, multi-agent orchestration, and vector store integration. pip install or Docker.
Haystack, built by deepset, is itself an open-source Python framework for building RAG pipelines and LLM-powered search and agent applications. Someone comparing alternatives here is likely weighing it against other open-source orchestration frameworks rather than looking for an open-source option in general.
Langflow is the main comparison point — it gives you a visual, drag-and-drop builder for RAG pipelines and agents, whereas Haystack is a code-first Python framework with more granular control over each pipeline component.
FAQ
Is there a free, open-source alternative to Haystack?
Yes. Langflow is MIT licensed and free to self-host, similar to Haystack's own open-source license.
What's the best open-source alternative to Haystack?
Langflow is the better pick if you want a visual builder for RAG and agent pipelines; Haystack remains the stronger choice if you prefer building pipelines directly in Python code.
What are the top open-source alternatives to Haystack?
Browse all open-source alternatives to Haystack above, or explore the full AI & LLM category for more options.