#rag

NestedRAG

An open-source RAG library that organizes documents into a nested tree instead of flat chunks, so an AI assistant retrieves one relevant piece per branch instead of repeating itself.

PageIndex

A document search engine for AI that reads and reasons through a document's structure like a human would, instead of chopping it into pieces and matching by similarity like traditional RAG.

DeepMem

Claude Code plugin that gives sessions persistent, semantically searchable memory across conversations

Context Engine

Single-tenant company memory system that pulls data from your existing tools and feeds it to AI agents

GitNexus

Runs entirely in your browser and turns any git repo into an interactive knowledge graph with a built-in AI agent for exploring the code.

EBM Lens

An open-source agentic RAG system that searches 12 biomedical databases and produces a source-cited synthesis of the evidence.

Dify

An open-source platform for building AI chatbots and automated workflows by connecting blocks on a canvas, instead of writing code from scratch.

Haystack

An open-source toolkit for building AI systems that answer questions using your own documents — feeding an AI model your company's PDFs, wikis, or support tickets so it answers from real content instead of guessing.

Ontheia

A free, open-source, self-hosted AI agent platform built for organizations that can't send data to a third-party cloud — think law firms, clinics or banks — with role-based access, memory, and support for every major AI model.

WeKnora

An open-source, self-hosted platform from Tencent that turns a pile of company documents into a searchable knowledge base with AI Q&A — built to plug into a very wide range of AI models and vector databases.

turbovec

A free, open-source vector search library that finds similar items (for AI search, recommendations, RAG) faster and using far less memory than the previous standard, FAISS.

OpenKB

A free, open-source command-line tool that reads your documents (PDFs, Word files, spreadsheets...) and turns them into a linked wiki you can browse in Obsidian, using AI instead of manual note-taking.

Leni

An AI analyst for real estate and private-equity investment teams that reads messy deal documents and produces underwriting, valuation and reporting outputs with source citations you can actually check.

Polygres

Turns a Postgres database into working memory for AI agents, with hybrid search across relational, graph, and vector queries in one call.

MemoryPlugin

Cross-platform long-term memory system that maintains shared context across 21+ AI tools without requiring repetition.

Mem0

Gives AI chatbots and agents a real memory — so they remember what you told them last week — instead of forgetting everything the moment a conversation ends, the way most AI apps do by default.

Zep

Builds a living map of everything a user has told an AI agent over time — and how those facts connect and change — so the agent can pull up exactly the right context in under 200 milliseconds instead of re-reading an entire chat history.

Firecrawl

Web scraping and crawling API that turns entire websites into clean, structured data ready for AI models to read.

turbopuffer

Vector + full-text search database built on object storage: cheap at scale, sub-10ms latency, used by Cursor, Notion and Linear.

Mastra

TypeScript framework for AI agents and workflows: typed tools, graph orchestration, memory, RAG and 90+ model providers.