AI tools for memory for agents: RAG and documents
Retrieval tools that let agents search documents, PDFs and knowledge bases and answer from them (RAG). Of the 72 tools on our memory for agents page, 19 fit this narrower job. By pricing: 15 open source, 4 pricing on the maker's site. The most-starred open repos here are MarkItDown (190,824 stars), RAGFlow (92,335 stars), PageIndex (39,186 stars). Most come from the memory & RAG (17), frameworks (2) categories.
MarkItDown
Microsoft's Python tool and MCP server that converts PDFs, Office documents, images, audio and web pages to Markdown for LLM and agent pipelines.
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RAGFlow
Open-source RAG engine with deep document parsing and agent features for building grounded question-answering over your files.
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PageIndex
Document index for reasoning-based, vectorless RAG that lets agents navigate long documents like a table of contents.
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Chroma
Open-source search and vector database widely used for agent memory and RAG.
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llmware
Framework for building private, local RAG and agent applications with small specialized models on AI PCs, edge and self-hosted setups.
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txtai
All-in-one Python framework for semantic search, LLM orchestration and agents built on an embeddings database of vector, graph and relational indexes.
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MemOS
Memory operating system for LLMs and agents with persistent memory and retrieval.
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LanceDB
Open-source multimodal vector database for search, RAG and agent memory.
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Activeloop
Deep Lake, a multimodal database for AI that stores vectors, images, text and video so agents and RAG apps can search and retrieve them.
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SimpleMem
Research-backed lifelong memory library for LLM agents that stores, compresses and retrieves text and multimodal memories, usable over MCP.
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Knowhere
Document parsing and retrieval system that turns messy files into structured, navigable memory for AI agents and RAG.
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seekdb
AI-native search database for agent storage combining vector, text and structured data.
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Neuron AI
PHP framework for creating and orchestrating AI agents with LLMs, tools, vector stores and memory.
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Qdrant MCP Server
Official Qdrant MCP server that lets agents store and retrieve memories and documents in the Qdrant vector database.
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Agentset
Open-source RAG platform for building agents and apps that answer accurately from your documents.
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BaseAI
Web AI framework from Langbase for building AI agents with memory (RAG) and deploying them serverless.
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Extend MCP
Extend's MCP server for turning documents into structured data: parse, extract, classify, split and fill PDF forms.
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LlamaParse
LlamaIndex's document processing platform that parses PDFs, scans and Office files into markdown or JSON and extracts, classifies and indexes them for agents.
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Zep
Context layer that unifies business data, documents and conversations into memory so agents complete tasks correctly.
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GitHub repos (14)
| Repo | GitHub stars | Licence | Last push |
|---|---|---|---|
| MarkItDown ↗ | 190,824 | MIT | 2026-10-04 |
| RAGFlow ↗ | 92,335 | Apache License 2.0 | 2026-10-17 |
| PageIndex ↗ | 39,186 | MIT | 2026-10-16 |
| Chroma ↗ | 29,512 | Apache License 2.0 | 2026-10-17 |
| llmware ↗ | 14,814 | — | 2026-10-01 |
| txtai ↗ | 13,024 | — | 2026-10-16 |
| MemOS ↗ | 11,892 | Apache License 2.0 | 2026-09-22 |
| LanceDB ↗ | 11,684 | Apache License 2.0 | 2026-10-16 |
| Activeloop ↗ | 9,252 | Apache License 2.0 | 2026-05-21 |
| SimpleMem ↗ | 3,836 | — | 2026-07-24 |
| Knowhere ↗ | 3,775 | — | 2026-10-16 |
| seekdb ↗ | 3,157 | Apache License 2.0 | 2026-10-16 |
| Neuron AI ↗ | 2,146 | — | 2026-10-16 |
| Qdrant MCP Server ↗ | 1,551 | — | 2026-08-11 |
14 repos. Stars and licence come from each repo, checked when the listing was last verified.
FAQ
What are the best AI tools for memory for agents focused on RAG and documents?
We list 19. The first three by GitHub stars and featured status are MarkItDown: Microsoft's Python tool and MCP server that converts PDFs, Office documents, images, audio and web pages to Markdown for LLM and agent pipelines.; RAGFlow: Open-source RAG engine with deep document parsing and agent features for building grounded question-answering over your files.; PageIndex: Document index for reasoning-based, vectorless RAG that lets agents navigate long documents like a table of contents.
Are there free or open-source options?
Yes: 15 open source, 4 pricing on the maker's site. Pricing is as each maker states it.
More from memory for agents
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