Best Retrieval-Augmented Generation Tools in 2026
Updated
In short: AnythingLLM is ranked #1 of 26 as of 7 October 2026, ahead of Flowise and txtai. The best-ranked option with a free plan is Flowise. The lowest first paid tier on this page is RAGFlow at $29/mo.
When a language-model workflow needs information beyond its prompt, retrieval-augmented generation tools offer ways to connect and work with external sources. Compared on source connectors, hybrid search, result reranking and source citations, they also differ in deployment options, maximum file size and whether a RAG workflow builder is available. Free plans and paid-from prices add cost details to weigh alongside those capabilities. You can compare AnythingLLM, Flowise and I3K RAG Enterprise on the criteria shown, as well as RAGFlow and Haystack Enterprise Platform. Consider which sources your workflow must use, how you plan to assemble it and what deployment fits your needs.
26 retrieval-augmented generation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
26ranked
13free plans on this page
$29/molowest paid tier
7 Oct 2026last checked
Input list Retrieval-Augmented Generation Tools 25 channels on this page · 94 of 200 spec lines stated by the makers
Ch Tool Free planPaid fromSource citationsHybrid searchResult rerankingSource connectorsDeploymentRAG workflow builder Spec sheet Score
01 AnythingLLM Free planYesPaid from$50/moSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 2/8spec lines stated 7.8
02 Flowise Free planYesPaid from$35/moSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 2/8spec lines stated 7.7
03 txtai Free plannot statedPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow builderYes 5/8spec lines stated 7.4
04 I3K RAG Enterprise Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow buildernot stated 5/8spec lines stated 7.3
05 RAGFlow Free planYesPaid from$29/moSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow builderYes 7/8spec lines stated 7.3
06 Haystack Enterprise Platform Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow builderYes 6/8spec lines stated 7.2
07 Google Cloud Agent Evaluation Free plannot statedPaid fromnot statedSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 0/8spec lines stated 7.1
08 OpenRAG Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow buildernot stated 5/8spec lines stated 7.1
09 Dify Free planYesPaid from$59/moSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 2/8spec lines stated 7.0
10 Langflow Free planYesPaid fromnot statedSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 1/8spec lines stated 7.0
11 Ragen Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentself hostedRAG workflow buildernot stated 5/8spec lines stated 6.9
12 LangChain Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingnot statedSource connectorsnot statedDeploymentself hostedRAG workflow buildernot stated 4/8spec lines stated 6.8
13 PrivateGPT Free plannot statedPaid fromnot statedSource citationsYesHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentself hostedRAG workflow buildernot stated 2/8spec lines stated 6.8
14 Kapa.ai Free planNoPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentcloudRAG workflow buildernot stated 5/8spec lines stated 6.7
15 Pathway Live Data Framework Free planYesPaid fromnot statedSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 1/8spec lines stated 6.7
16 Progress Agentic RAG Free planNoPaid from$700/moSource citationsYesHybrid searchYesResult rerankingnot statedSource connectorsnot statedDeploymentbothRAG workflow builderYes 6/8spec lines stated 6.7
17 Vectara Free planNoPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow builderYes 6/8spec lines stated 6.7
18 Haystack Free plannot statedPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentself hostedRAG workflow builderYes 5/8spec lines stated 6.5
19 Graphiti Free plannot statedPaid fromnot statedSource citationsnot statedHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentself hostedRAG workflow buildernot stated 3/8spec lines stated 6.1
20 RAGStack Free plannot statedPaid fromnot statedSource citationsYesHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentbothRAG workflow builderNo 3/8spec lines stated 6.1
21 Amazon Bedrock Knowledge Bases Free plannot statedPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentcloudRAG workflow buildernot stated 4/8spec lines stated 5.8
22 Amazon Nova ReelAmazon Web Services Free plannot statedPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingYesSource connectorsnot statedDeploymentcloudRAG workflow buildernot stated 4/8spec lines stated 5.7
23 Quivr Free planNoPaid fromnot statedSource citationsNoHybrid searchnot statedResult rerankingYesSource connectorsnot statedDeploymentbothRAG workflow builderYes 5/8spec lines stated 5.6
24 R2R Free planYesPaid fromnot statedSource citationsYesHybrid searchYesResult rerankingnot statedSource connectorsnot statedDeploymentself hostedRAG workflow buildernot stated 4/8spec lines stated 5.5
25 LlamaIndex Free planYesPaid from$50/moSource citationsnot statedHybrid searchnot statedResult rerankingnot statedSource connectorsnot statedDeploymentnot statedRAG workflow buildernot stated 2/8spec lines stated 5.2
Compare all 25 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Source citations | Hybrid search |
|---|---|---|---|---|---|---|---|---|
| 1 | AnythingLLM | 7.8 | Free plan | — | Yes | 50 /mo | — | — |
| 2 | Flowise | 7.7 | Free plan | $35/mo | Yes | 35 /mo | — | — |
| 3 | txtai | 7.4 | Free plan | Free | — | — | Yes | Yes |
| 4 | I3K RAG Enterprise | 7.3 | Free plan | Free | Yes | — | Yes | Yes |
| 5 | RAGFlow | 7.3 | Free plan | $29/mo | Yes | 29 /mo | Yes | Yes |
| 6 | Haystack Enterprise Platform | 7.2 | Free plan | Free | Yes | — | Yes | Yes |
| 7 | Google Cloud Agent Evaluation | 7.1 | No | — | — | — | — | — |
| 8 | OpenRAG | 7.1 | Free plan | Free | Yes | — | Yes | Yes |
| 9 | Dify | 7.0 | Free plan | $49.17/mo | Yes | 59 /mo | — | — |
| 10 | Langflow | 7.0 | No | — | Yes | — | — | — |
| 11 | Ragen | 6.9 | Free plan | Free | Yes | — | Yes | Yes |
| 12 | LangChain | 6.8 | Free plan | $39/mo | Yes | — | Yes | Yes |
| 13 | PrivateGPT | 6.8 | No | — | — | — | Yes | — |
| 14 | Kapa.ai | 6.7 | No | — | No | — | Yes | Yes |
| 15 | Pathway Live Data Framework | 6.7 | Free plan | Free | Yes | — | — | — |
| 16 | Progress Agentic RAG | 6.7 | No | $700/mo | No | 700 /mo | Yes | Yes |
| 17 | Vectara | 6.7 | No | $8333.33/mo | No | — | Yes | Yes |
| 18 | Haystack | 6.5 | Free plan | Free | — | — | Yes | Yes |
| 19 | Graphiti | 6.1 | No | — | — | — | — | Yes |
| 20 | RAGStack | 6.1 | No | — | — | — | Yes | — |
| 21 | Amazon Bedrock Knowledge Bases | 5.8 | No | — | — | — | Yes | Yes |
| 22 | Amazon Nova Reel | 5.7 | No | — | — | — | Yes | Yes |
| 23 | Quivr | 5.6 | No | — | No | — | No | — |
| 24 | R2R | 5.5 | No | — | Yes | — | Yes | Yes |
| 25 | LlamaIndex | 5.2 | Free plan | $50/mo | Yes | 50 /mo | — | — |
Is your tool on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which retrieval-augmented generation tool is ranked first on Specifiction?
AnythingLLM is ranked #1 of 26 with a score of 7.8. Flowise is second and txtai third.
How many of these have a free plan?
13 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, RAGFlow has the lowest first paid tier we found: $29/mo.
How is this list ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.
More in Developer Tools
All developer tools listsAccessibility Testing Software 168Log Management Software 107AI Coding Assistants 103Package Managers 93AI Agent Platforms 73Reverse Engineering Tools 73Software Composition Analysis Software 65Browser Automation Tools 63Integrated Development Environments 62Artifact repository software 60Code Playground Software 58Network Monitoring 56