Haystack
Open-source framework for building LLM-powered search pipelines
- Pricing
- Paid
- Platform
- Web
- Open source
- Yes
About Haystack
Haystack is an open-source Python framework by deepset for building production-ready NLP applications, including RAG pipelines, semantic search, and question-answering systems. It supports a wide range of LLMs and document stores, giving ML engineers and developers the composable building blocks to ship robust AI applications.
Specifications
Everything we hold on this listing.
- Category
- Coding & Dev Tools
- Pricing
- Paid
- Platforms
- Web
- Website
- haystack.deepset.ai
- Open source
- Yes
- Added
- Apr 23, 2026
- Source
- awesome
opensource, platform, tags were inferred from this tool's own description, not confirmed by its maker. Claim this listing to correct it.
How Haystack compares
The closest tools in the directory, matched on shared capability rather than category alone.
| Tool | Pricing | API | Open source |
|---|---|---|---|
| Haystack | Paid | Not stated | Yes |
| LangChain | Paid | Not stated | Yes |
| LlamaIndex | Paid | Not stated | Yes |
| Mastra | Paid | Yes | Yes |
| co:here | Paid | Not stated | Not stated |
Frequently asked
What is Haystack used for?
Haystack is an open-source Python framework by deepset for building production-ready NLP applications, including RAG pipelines, semantic search, and question-answering systems. It supports a wide range of LLMs and document stores, giving ML engineers and developers the composable building blocks to ship robust AI applications.
Is Haystack free?
Haystack is Paid. Paid tool. Visit the site to view current pricing plans.
What platforms does Haystack run on?
Haystack runs on Web. Whether it offers a public API isn't stated, check the vendor's docs before planning an integration.
Is Haystack open source?
Yes, Haystack publishes its source, so you can self-host it, audit what it does with your data, and avoid per-seat pricing. Browse more open-source options at brofindai.com/tags/open-source.
What are the best alternatives to Haystack?
The closest alternatives are LangChain, LlamaIndex, Mastra, co:here, all coding & dev tools tools that overlap with Haystack on coding, developer, llm. See the full list at brofindai.com/alternatives/haystack.
