RAG Frameworks Rankings

Docling

RAG Frameworks· docling-project.github.io

Open source

IBM-backed document conversion toolkit for preparing PDFs and complex documents for generative AI and RAG pipelines.

Firecrawl

RAG Frameworks· firecrawl.dev

Freemium

Web data API and open-source crawling stack for turning sites into clean markdown, structured data, and agent-ready content for RAG and automation pipelines.

Microsoft MarkItDown

RAG Frameworks· github.com

Open source

Microsoft MarkItDown is an open-source document conversion tool that turns files and office documents into Markdown for LLM, RAG, and text-analysis pipelines.

Pathway

RAG Frameworks· pathway.com

Freemium

Python framework for streaming ETL, real-time analytics, LLM pipelines, and live RAG systems.

RAGFlow

RAG Frameworks· ragflow.io

Open source

RAGFlow is an open-source RAG engine with document understanding, hybrid search, and agent orchestration for building production retrieval workflows over complex files.

DSPy

RAG Frameworks· dspy.ai

Open source

Python framework for programming and optimizing LLM systems with structured signatures, modules, teleprompters, RAG pipelines, and agents.

Haystack

RAG Frameworks· haystack.deepset.ai

Open source

Open-source framework for production LLM applications, RAG pipelines, search, and agentic workflows.

Khoj

RAG Frameworks· khoj.dev

Freemium

Self-hostable AI second brain for answers over documents and the web, custom agents, automations, and deep research.

LightRAG

RAG Frameworks· lightrag.github.io

Open source

LightRAG is a graph-based retrieval framework and API server for building fast knowledge-graph RAG systems that combine vector and graph retrieval.

Cognee

RAG Frameworks· cognee.ai

Open source

Open-source AI memory and knowledge graph engine for persistent agent context.

Graphiti

RAG Frameworks· help.getzep.com

Open source

Temporal knowledge graph memory layer for AI agents that need evolving user, entity, and relationship context over time.

Crawl4AI

RAG Frameworks· crawl4ai.com

Open source

Open-source crawling and extraction framework for feeding RAG and agent pipelines with markdown, structured data, and browser-backed collection flows.

Kotaemon

RAG Frameworks· cinnamon.github.io

Open source

Open-source RAG application framework for building document chat and knowledge-base assistants over private files.

Onyx

RAG Frameworks· onyx.app

Open source

Open-source AI knowledge platform for enterprise search, chat, connectors, and RAG over internal data.

CocoIndex

RAG Frameworks· cocoindex.io

Open source

Incremental indexing engine for long-horizon agents and continuously updated RAG dataflows.

Supermemory

RAG Frameworks· supermemory.ai

Freemium

Memory and context API for adding long-term recall, RAG, and user profiles to AI agents.

LangChain

RAG Frameworks· langchain.com

Open source

Framework for composing agents, RAG workflows, retrieval, and tool calls.

Instructor

RAG Frameworks· python.useinstructor.com

Open source

Structured-output library that adds validation, retries, and typed extraction across LLM providers and multiple languages.

AnySearch

RAG Frameworks· anysearch.com

Freemium

Real-time structured search API and agent skill for web, code, academic, and multimodal retrieval.

LlamaIndex

RAG Frameworks· llamaindex.ai

Open source

Data framework for document ingestion, retrieval, and RAG over private data.

LangChain4j

RAG Frameworks· docs.langchain4j.dev

Open source

Java framework for integrating LLMs, RAG pipelines, tools, and agent workflows into JVM applications.

Biel.ai

RAG Frameworks· biel.ai

Freemium

Hosted RAG layer and MCP server that gives IDEs and AI assistants source-cited access to indexed product documentation.

DataChain

RAG Frameworks· datachain.ai

Open source

Versioned context layer for unstructured AI datasets across object storage, built for document and multimodal pipelines.

deja

RAG Frameworks· vshulcz.github.io

Open source

Local-first memory layer for coding agents that indexes existing session logs, redacts secrets, and exposes fast cross-harness recall through MCP.

Unstructured

RAG Frameworks· unstructured.io

Freemium

Document processing and ingestion platform for turning PDFs, HTML, Office files, and enterprise content into clean data for RAG pipelines.

txtai

RAG Frameworks· neuml.github.io

Open source

All-in-one framework for semantic search, embeddings, LLM orchestration, and language-model workflows.

Morphik

RAG Frameworks· morphik.ai

Freemium

AI-native multimodal document ingestion, retrieval, and search infrastructure for RAG applications.

Graphlit

RAG Frameworks· graphlit.com

Freemium

API-first RAG and knowledge-ingestion platform for connecting content sources, extracting entities, and building searchable AI memory.

Mirascope

RAG Frameworks· mirascope.com

Open source

Lightweight LLM development toolkit for prompt engineering, tool calling, evaluations, and provider-agnostic application code.

Unstract

RAG Frameworks· unstract.com

Open source

Open-source LLM platform for extracting structured data from unstructured documents into APIs and ETL workflows.

NoteBrain CLI

RAG Frameworks· github.com

Open source

Local-first CLI that turns Obsidian vaults into an offline semantic-search and knowledge-graph backend for AI coding agents.

Paxm

RAG Frameworks· github.com

Open source

Persistent provider-neutral memory for Codex, Claude Code, OpenCode, Pi, and MCP coding agents.

Tavily

RAG Frameworks· tavily.com

Freemium

Search and extraction API for AI agents that need live web context, retrieval, and structured research inputs.

DB-GPT

RAG Frameworks· dbgpt.site

Open source

Open-source AI-native data app framework for text-to-SQL, RAG over databases, and private data agents.

BaseThread

RAG Frameworks· basethread.ai

Freemium

Shared team context graph exposed over MCP so coding assistants can read decisions and write activity without repeated re-explanation.

Cap'n Hook

RAG Frameworks· github.com

Open source

Persistent, invalidation-aware memory for coding agents that recalls codebase discoveries and removes stale context when files change.

Scribe

RAG Frameworks· getscribe.dev

Open source

Self-hosted CLI that compiles repositories, coding sessions, and URLs into portable Git-backed memory for agents.

Exa

RAG Frameworks· exa.ai

Freemium

AI-native web search, crawling, and research API with MCP support for retrieval and grounding in production agent workflows.

Kit for AI

RAG Frameworks· kitforai.com

Freemium

Persistent memory, document conversion, retrieval, and structured extraction for AI agents through REST and MCP interfaces.