18.4
Dify is an open-source platform for building AI applications with workflows, knowledge retrieval, model management, observability, and tools.
Free planOpen sourceWebAPIExtension
Best Retrieval-Augmented Generation Tools in 2026
If you are building a retrieval-augmented generation workflow, compare how tools connect sources, search information and present results. Compared on source connectors, hybrid search, result reranking and source citations, the entries also differ in deployment options, maximum file size and RAG workflow builders. Free-plan availability and paid-from pricing can help you weigh cost alongside those capabilities.…
28.0
RAGFlow is an open-source retrieval-augmented generation engine and agent platform for building a context layer for AI agents.
Free planOpen sourceWebAPILinux
37.9
AnythingLLM is a private AI assistant available as desktop software, a mobile app, and self-hosted or cloud deployments.
Free planAndroidWebAPI
- 4
Flowise
Flowise is an open-source platform for building generative AI agents and workflows based on large language models.
Free planWebAPILinuxmacOS7.2From $35 a month - 5
LlamaIndex
LlamaIndex helps developers and enterprises process documents and build AI workflows around them.
Free planWebAPILinuxSelf-hosted7.1From $50 a month - 6
PrivateGPT
PrivateGPT is a free, open-source API layer for building private AI applications on your own infrastructure.
Free planWebAPILinuxmacOS6.9Free plan - 7
LangChain
LangChain is a free, open-source framework for building agents that connect models with tools.
Free planAPISelf-hosted6.8$39 usage-based - 8
Azure AI Speech
Free planWebAPISelf-hosted6.7Free plan - 9
OpenRAG
OpenRAG is a free, AGPL-3.0 modular framework for building document-grounded retrieval-augmented generation systems.
Free planWebAPISelf-hosted6.7Free plan - 10
txtai
txtai is an open-source framework for semantic search, language-model orchestration, and language-model workflows.
Free planAPILinuxmacOSSelf-hosted6.7Free plan - 116.6From €150 a month
- 12
Haystack
Haystack is an open-source AI orchestration framework for developers building agents, multimodal applications, advanced retrieval-augmented…
Free planAPISelf-hosted6.4Free plan - 13
I3K RAG Enterprise
I3K RAG Enterprise lets users ask questions about uploaded documents and receive answers grounded in those files, with cited sources.
Free planWebAPILinuxSelf-hosted6.4Free plan - 14
Graphiti
Graphiti is an open-source framework for building and querying temporal context graphs for AI agents.
Free planAPISelf-hosted6.3Free plan - 15
Langflow
Langflow is a free, open-source Python framework for building customizable AI applications, including agent and MCP applications.
WebAPILinuxmacOS6.2 - 16
Progress Agentic RAG
Progress Agentic RAG provides a centralized knowledge layer connecting enterprise content to AI experiences.
WebAPISelf-hosted6.2From $700 a month - 17
Haystack Enterprise Platform
Haystack Enterprise Platform is an operational layer for teams building, evaluating, deploying, and governing production AI agents and applications.
Free planWebAPISelf-hosted6.1Free plan - 18
Pathway Live Data Framework
Pathway Live Data Framework is a Python framework for building analytics and AI data pipelines over stored data and live streams.
Free planAPISelf-hosted6.1Free plan - 19
Ragen
Ragen is a company knowledge assistant that answers questions from documents and tools with citations to the source.
Free planWebAPISelf-hosted6.1Free plan - 20
RAGStack
RAGStack is a curated collection of open-source software for building retrieval-augmented generation applications.
Free planLinuxmacOSSelf-hostedWindows6.1Free plan - 21
ServerBackup
ServerBackup is a free plugin for protecting Minecraft server files and worlds from data loss, griefing, and chunk failures.
Free planLinuxSelf-hosted5.9Free plan - 22
Kapa.ai
Kapa.ai connects unstructured knowledge to AI agents, providing grounded context or prebuilt agents for customer self-service, internal teams, and technical developers.
WebAPISelf-hosted5.8 - 23
Vectara
Vectara is a paid enterprise AI agent platform for building governed, grounded, and auditable agents.
WebAPISelf-hosted5.8 - 244.9
- 25
4.6