Pyyan / Compare / Cognee vs LangChain & LangGraph vs Haystack
Cognee vs LangChain & LangGraph vs Haystack
3 of 5RAG & Knowledge Graphs · verified 13 Aug 2026
| Specification | Cognee | LangChain & LangGraph | Haystack |
|---|---|---|---|
| Summary | Graph and vector together, with a pipeline that improves itself. | Orchestration, with retrieval as one piece. | A strict pipeline abstraction, built for regulated work. |
| Kind | Framework | Framework | Framework |
| Graph | Yes, core | Via integrations | Via integrations |
| Language | Python | Python, TypeScript | Python |
| Licence | Apache 2.0 | MIT | Apache 2.0 |
| GitHub stars | ~7k | ~120k | ~20k |
| Category | RAG & Knowledge Graphs | RAG & Knowledge Graphs | RAG & Knowledge Graphs |
| Official | Cognee ↗ | LangChain ↗ | deepset ↗ |
Highlighted rows are where these differ.
Cognee
- Many retrieval modes over one memory layer
- Re-weights the graph from feedback
Best for deep knowledge retrieval.
LangChain & LangGraph
- LangGraph adds durable state and checkpointing
- Widely used, and widely argued about
Best for agents that retrieve as one step among many.
Haystack
- Every step is declared, which is what audits need
- Cleanest option where a wrong answer has consequences
Best for finance, health, legal and government.