Haystack
Haystack is an open source AI orchestration framework from deepset GmbH for building agents and applications on top of large language models. It covers retrieval, reasoning, memory and tool use, and installs with pip install haystack-ai. deepset also sells Haystack Enterprise products and support.
Facts checked on against the sources listed at the end of this page.
- Pricing
- Open sourceFree plan: Yes: the framework is free and open source
- Open source
- YesApache-2.0
A good fit for
- RAG applications over your own documents
- Teams that want explicit, inspectable pipelines instead of hidden prompts
- Projects that need to switch between model providers and vector stores
- Companies that may want a vendor behind the framework
Not a good fit for
- Non-Python stacks: the framework is installed with pip
- Small one-off scripts that only need a single model call
- Teams that want published enterprise pricing up front
Haystack pricing
The framework is free under an open source license. deepset sells Haystack Enterprise products and support, but the project site does not list prices.
Prices in USD, checked on 14 October 2026. Current prices on haystack.deepset.ai.
Main features
- Pipelines
- Compose retrieval, reasoning, memory and tool use into one workflow.
- Provider integrations
- OpenAI, Anthropic, Mistral, Hugging Face and others.
- Vector store integrations
- Weaviate, Pinecone, Elasticsearch and others.
- Serializable pipelines
- Save and move pipelines, with Kubernetes-ready deployment.
- Logging and monitoring
- Support for observing pipelines in production.
- Haystack Enterprise
- Paid products and support from deepset.
About Haystack
Haystack lets you build LLM applications from composable parts. Pipelines connect components for retrieval, generation, memory and tools, and you can look inside them to debug what the model saw.
It integrates with model providers and vector stores including OpenAI, Anthropic, Mistral, Hugging Face, Weaviate, Pinecone and Elasticsearch. Pipelines are serializable, cloud-agnostic and Kubernetes-ready.
Typical uses on the project site are RAG, AI agents, multimodal AI, conversational AI and content generation.
- Made by
- deepset GmbH
- Based in
- Berlin, Germany
- Free plan
- Yes: the framework is free and open source
- Available on
- Python
Haystack alternatives
Getting started
Install Haystack.
pip install haystack-ai
Questions about Haystack
Is Haystack free?
Yes. The framework is open source and free. deepset also sells Haystack Enterprise products and support.
Who makes Haystack?
deepset GmbH.
How do I install Haystack?
Run pip install haystack-ai.
What is Haystack used for?
The project site lists RAG, AI agents, multimodal AI, conversational AI and content generation.
Sources and links
Work on Haystack? Claim this listing. Something wrong or out of date? Suggest a correction. Stats come from the public GitHub and npm APIs and update every day.