Haystack

What it is good for

• Building question answering over company documents
• Searching large collections of text by meaning
• Connecting AI models to tools and retrieved information
• Deploying AI pipelines as web APIs for other apps

At a glance

Who it is for

• Developers
• Automation and no-code builders
• Researchers and analysts

Setup

Requires programming

Level 5 of 5. You need to write code to use it.

Cost

Free and open source

Type

Framework or SDK

Tasks

• Summarize and question documents and PDFs
• Research a topic across the web
• Connect apps and automate repetitive work

Works with

OpenAI, Mistral, Anthropic, Cohere, Hugging Face, Google

Momentum

Rank this week

Not ranked yet

Best rank

None yet

GitHub stars

26,907

GitHub numbers as of Nov 2, 2026. Updated weekly.

Official links

Setup steps are on the official pages. We do not repeat them here, since they change.

• Official website
• Source code on GitHub
• PyPI package

Questions

Is Haystack free?

Yes. It is free and open source (Apache-2.0 license).

Do I need to know how to code to use Haystack?

Yes. You need to write code to use it.

What does Haystack work with?

According to its own documentation, it works with OpenAI, Mistral, Anthropic, Cohere, Hugging Face, and Google.

What is Haystack good for?

Building question answering over company documents, searching large collections of text by meaning, connecting AI models to tools and retrieved information, and deploying AI pipelines as web APIs for other apps.

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