Knowledge Base & RAG
Enterprise search and RAG platforms — alternatives to Glean and Notion AI.
156 projects
See methodology for ranking rules; order uses public GitHub metrics within this scenario.
| Rank | Project | Stars | Forks | Updated | License |
|---|---|---|---|---|---|
| 41 |
morphic
An AI-powered search engine with a generative UI |
9.1K | 2.4K | 08/29/26 | Apache-2.0 |
| 42 |
azure-search-openai-demo
A sample app for the Retrieval-Augmented Generation pattern running in Azure, using Azure AI Search for retrieval and Azure OpenAI large language models to power ChatGPT-style and Q&A experiences. |
7.7K | 5.5K | 08/27/26 | MIT |
| 43 |
KAG
Logical form-guided reasoning and retrieval framework built on OpenSPG and LLMs for professional knowledge bases, overcoming RAG vector similarity limitations. |
9.0K | 712 | 01/28/26 | Apache-2.0 |
| 44 |
airweave
Open-source context retrieval layer for AI agents |
6.6K | 816 | 06/05/26 | MIT |
| 45 |
R2R
SoTA production-ready AI retrieval system. Agentic Retrieval-Augmented Generation (RAG) with a RESTful API. |
8.0K | 646 | 11/07/25 | MIT |
| 46 |
paperless-ai
An automated document analyzer for Paperless-ngx using OpenAI API, Ollama, Deepseek-r1, Azure and all OpenAI API compatible Services to automatically analyze and tag your documents. |
5.9K | 329 | 08/22/26 | MIT |
| 47 |
deep-searcher
Open Source Deep Research Alternative to Reason and Search on Private Data. Written in Python. |
8.2K | 797 | 11/19/25 | Apache-2.0 |
| 48 |
zotero-mcp
Zotero MCP: Connects your Zotero research library with Claude and other AI assistants via the Model Context Protocol to discuss papers, get summaries, analyze citations, and more. |
4.8K | 383 | 08/25/26 | MIT |
| 49 |
UltraRAG
A Low-Code MCP Framework for Building Complex and Innovative RAG Pipelines |
5.7K | 444 | 08/29/26 | Apache-2.0 |
| 50 |
genai-stack
Langchain + Docker + Neo4j + Ollama |
5.4K | 1.2K | 08/10/26 | Other |
| 51 |
AutoRAG
AutoRAG: Now your agent can find anything in your computer. It gets smarter if you are using it frequently. |
5.1K | 433 | 08/29/26 | Other |
| 52 |
obsidian-smart-connections
Find related notes and excerpts while writing. Your link building copilot displays relevant content in graph + list view. A local embedding model powers semantic search. Zero setup. No API key. |
5.4K | 340 | 08/26/26 | Other |
| 53 |
chonkie
🦛 CHONK docs with Chonkie ✨ — The lightweight ingestion library for fast, efficient and robust RAG pipelines |
4.7K | 352 | 08/26/26 | MIT |
| 54 |
marqo
Ecommerce Search and Discovery - marqo.ai |
5.0K | 239 | 08/08/26 | Apache-2.0 |
| 55 |
notebooklm-skill
Enable Claude Code to query your NotebookLM notebooks for source-grounded, citation-backed answers from your own documents. |
7.7K | 872 | 11/21/25 | MIT |
| 56 |
OB1
Open Brain — The infrastructure layer for your thinking. One database, one AI gateway, one chat channel — any AI plugs in. No middleware, no SaaS. |
4.5K | 871 | 08/29/26 | Other |
| 57 |
sourcebot
Sourcebot is a self-hosted tool that helps humans and agents understand your codebase. |
3.9K | 361 | 08/28/26 | Other |
| 58 |
telegram-search
Export and fuzzy search your Telegram chat history |
4.1K | 273 | 08/26/26 | AGPL-3.0 |
| 59 |
pipeshub-ai
PipesHub is an open-source fully extensible AI context layer that unifies your business data for explainable enterprise search and agentic workflow automation. |
3.7K | 554 | 08/29/26 | Apache-2.0 |
| 60 |
basic-memory
AI conversations that actually remember. Never re-explain your project to your AI again. Join our Discord: https://discord.gg/tyvKNccgqN |
3.8K | 267 | 08/29/26 | AGPL-3.0 |