Haystack Review 2026
The Open Source AI Framework for Production Ready Agents, RAG & Context Engineering
What is Haystack?
Haystack is an open-source AI framework by deepset for building production-ready agents, RAG, and context engineering. It offers a modular architecture with no vendor lock-in.
Best for
Mixed
Use cases
- Advanced RAG
- AI agents
- Conversational AI
- Content generation
Key features
Modular AI framework
RAG pipelines
AI agents
Multimodal AI
Serializable pipelines
Kubernetes-ready
Pricing
Model
freemium
Price range
Open source free; Enterprise support and platform with flexible pricing
Free tier
Yes
Integrations
Haystack integrates with 7 tools including:
OpenAIAnthropicMistralHugging FaceWeaviatePineconeElasticsearch
Haystack alternatives
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