Plain-AyI
← All projects
Developer building blocks

Haystack

A Python framework for building AI apps that search documents, answer questions and run agents.

What it does

Haystack lets programmers build AI apps out of connected steps, called pipelines. A pipeline might find the right documents, pass them to an AI model, and return an answer.

It's used for search, question answering, chatbots and AI agents. Its makers focus on giving developers clear control over each step.

Who it's for

Python developers building document search and AI assistants.

Can I use it without coding?

Developers only. A Python library that needs programming. New to this? Start here.

Can I run it?

Cost
Free, with optional paid extrasThe open-source version is free; the makers also sell a hosted or pro version.
Privacy
Your choice: run it on your device or use an online service
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it