Best Retrieval-Augmented Generation Tools in 2026
Updated
RAG tools bring external material into language-model workflows, so the right fit depends on your sources, retrieval needs, and deployment approach. Compare source connectors, hybrid search, result reranking, and source citations, along with maximum file size and deployment options. A workflow builder may be useful if you want to assemble the process within the tool. AnythingLLM, OpenRAG, and Dify are among the entries to assess. Check free plans and paid-from pricing, then weigh the listed capabilities against the systems and content your team needs to work with.
Retrieval-Augmented Generation Tools, one module each.A lit port is something its maker publishes; 22 of 22 with a known API signal have a public API.
- 01 AnythingLLM API yesFREE yesDOCS 7.4Free
- 02 Graphiti API yesFREE yesDOCS 7.4Free
- 03 OpenRAG API yesFREE yesDOCS 7.4Free
- 04 Dify API yesFREE yesDOCS 7.3$49.17/mo
- 05 Haystack API yesFREE yesDOCS 7.3Free
- 06 Haystack Enterprise Platform API yesFREE yesDOCS 7.3Free
- 07 I3K RAG Enterprise API yesFREE yesDOCS 7.3Free
- 08 LangChain API yesFREE yesDOCS 7.3$39/mo
- 09 LlamaIndex API yesFREE yesDOCS 7.3$50/mo
- 10 PrivateGPT API yesFREE yesDOCS 7.3Free
- 11 Quivr API yesFREE yesDOCS 7.3€150/mo
- 12 Ragen API yesFREE yesDOCS 7.3Free
- 13 RAGFlow API yesFREE yesDOCS 7.3$29/mo
- 14 txtai API yesFREE yesDOCS 7.3Free
- 15 Flowise API yesFREE yesDOCS 7.2$35/mo
- 16 Google Cloud Agent Evaluation API yesFREE yesDOCS 7.2
- 17 Pathway Live Data Framework API yesFREE yesDOCS 7.2Free
- 18 Langflow API yesDOCS 6.9
- 19 Amazon Nova ReelAmazon Web Services API yesDOCS 6.8
- 20 Kapa.ai API yesFREE noDOCS 6.7
- 21 Progress Agentic RAG API yesFREE noDOCS 6.7$700/mo
- 22 Vectara API yesFREE noDOCS 6.7$8333.33/mo
- 23 RAGStack FREE yesDOCS 5.8Free
- 24 ServerBackup FREE yesDOCS 5.8Free
- 25 Amazon Bedrock Knowledge Bases DOCS 5.1
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Source citations | Hybrid search |
|---|---|---|---|---|---|---|---|---|
| 1 | AnythingLLM | 7.4 | Free plan | Yes | 50 /mo | |||
| 2 | Graphiti | 7.4 | Free plan | Free | Yes | |||
| 3 | OpenRAG | 7.4 | Free plan | Free | Yes | Yes | Yes | |
| 4 | Dify | 7.3 | Free plan | $49.17/mo | Yes | 59 /mo | ||
| 5 | Haystack | 7.3 | Free plan | Free | Yes | Yes | ||
| 6 | Haystack Enterprise Platform | 7.3 | Free plan | Free | Yes | Yes | Yes | |
| 7 | I3K RAG Enterprise | 7.3 | Free plan | Free | Yes | Yes | Yes | |
| 8 | LangChain | 7.3 | Free plan | $39/mo | Yes | Yes | Yes | |
| 9 | LlamaIndex | 7.3 | Free plan | $50/mo | Yes | 50 /mo | ||
| 10 | PrivateGPT | 7.3 | Free plan | Free | Yes | |||
| 11 | Quivr | 7.3 | Free plan | €150/mo | No | No | ||
| 12 | Ragen | 7.3 | Free plan | Free | Yes | Yes | Yes | |
| 13 | RAGFlow | 7.3 | Free plan | $29/mo | Yes | 29 /mo | Yes | Yes |
| 14 | txtai | 7.3 | Free plan | Free | Yes | Yes | ||
| 15 | Flowise | 7.2 | Free plan | $35/mo | Yes | 35 /mo | ||
| 16 | Google Cloud Agent Evaluation | 7.2 | ||||||
| 17 | Pathway Live Data Framework | 7.2 | Free plan | Free | Yes | |||
| 18 | Langflow | 6.9 | Yes | |||||
| 19 | Amazon Nova Reel | 6.8 | Yes | Yes | ||||
| 20 | Kapa.ai | 6.7 | No | No | Yes | Yes | ||
| 21 | Progress Agentic RAG | 6.7 | No | $700/mo | No | 700 /mo | Yes | Yes |
| 22 | Vectara | 6.7 | No | $8333.33/mo | No | Yes | Yes | |
| 23 | RAGStack | 5.8 | Free plan | Free | Yes | |||
| 24 | ServerBackup | 5.8 | Free plan | Free | Yes | |||
| 25 | Amazon Bedrock Knowledge Bases | 5.1 | Yes | Yes |
Is your platform on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.