Haystack

Haystack is an open-source AI framework for building production-ready agents.

Pricing: open_source — Free and open source · Visit website

Haystack is a modular and customizable open-source AI framework designed for creating agentic, context-engineered systems. It supports real-world applications through its integration with various tools like OpenAI, Anthropic, Weaviate, and Elasticsearch. With Haystack, teams can build transparent, context-engineered AI agents that are easily integrated into existing workflows.

Pros

Modular framework
Open architecture
Vendor-agnostic

Cons

Steep learning curve
Requires technical expertise

FAQ

Is Haystack open source?

Yes, it is available on GitHub.

What languages does Haystack support?

Haystack supports Python.

Can I use Haystack for commercial projects?

Yes, it's free and open to commercial use.

Last updated: 2026-06-21