Haystack vs Semantic Kernel(2026)
Haystack is better for teams that need production-grade reliability. Semantic Kernel is the stronger choice if best .net support. Haystack is open-source (from $0) and Semantic Kernel is open-source (from $0).
Full feature breakdown, pricing details, and pros & cons below.
By Bikram Nath
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Haystack
Haystack by deepset is an open-source LLM framework for building production-ready search and question-answering pipelines with modular components and enterprise reliability.
Starting at $0
Visit HaystackSemantic Kernel
Semantic Kernel is Microsoft's open-source AI SDK that enables developers to integrate LLMs into .NET, Python, and Java applications with plugins, memory, and multi-agent orchestration.
Starting at $0
Visit Semantic KernelHow Do Haystack and Semantic Kernel Compare on Features?
| Feature | Haystack | Semantic Kernel |
|---|---|---|
| Pricing model | open-source | open-source |
| Starting price | $0 | $0 |
| Modular pipeline architecture | ✓ | — |
| Document stores | ✓ | — |
| Retrieval pipelines | ✓ | — |
| Prompt builder | ✓ | — |
| Evaluation tools | ✓ | — |
| REST API deployment | ✓ | — |
| Enterprise support | ✓ | — |
| Plugin architecture | — | ✓ |
| Memory management | — | ✓ |
| Multi-agent orchestration | — | ✓ |
| .NET/Python/Java | — | ✓ |
| Azure OpenAI integration | — | ✓ |
| Process framework | — | ✓ |
| Planners | — | ✓ |
Haystack Pros and Cons vs Semantic Kernel
Haystack
Semantic Kernel
Should You Use Haystack or Semantic Kernel?
For most teams, Haystack is the better default: it offers production-grade reliability and is open-source (from $0). Choose Semantic Kernel instead if best .net support matters more than smaller community than langchain. There is no universal winner — the right pick depends on your budget, team size, and whether you value production-grade reliability or best .net support more.
Choose Haystack if…
- •Production-grade reliability
- •Modular architecture
- •Strong evaluation tools
Choose Semantic Kernel if…
- •Best .NET support
- •Enterprise-grade (Microsoft)
- •Strong Azure integration