Key features
Core capabilities each platform advertises.
- Scalable knowledge search
- Agent-optimized retrieval
- Production-grade infrastructure
- Accuracy-focused
R2R- RAG engine
- End-to-end
- Deployable
- Open source
Updated March 27, 2026
Accurate knowledge search that scales for AI agents — production-grade retrieval infrastructure.
End-to-end open-source RAG engine with server, API, and pipeline pre-built. RAG to Riches.
Core capabilities each platform advertises.
R2RWhat each tool does well, and the limitations to keep in mind.
Pros
Cons
R2RPros
Cons
Choose Captain if you wantChoose if you want
Choose R2R if you wantChoose if you want
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