RAG Open Source Tools

Alternative toVectara

Open-source RAG engine with document parsing and agent orchestration

• 92,544 GitHub stars
• Apache-2.0Licence Apache-2.0
• #LLM

Alternative toLlamaParse

Document parsing for LLM workflows, OCR, and agent reading.

• 82,142 GitHub stars
• CustomLicence Apache-2.0 with commercial threshold and attribution terms
• #LLM

Alternative toChatGPT

Chat with your documents using any LLM, private and self-hosted

• 67,351 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toOpenAI API

Self-hosted AI runtime: any model, any modality, any hardware.

• 49,798 GitHub stars
• MITLicence MIT
• #LLM

Alternative toUnstructured.io

Convert documents to clean markdown and JSON with open source AI.

• 40,566 GitHub stars
• Apache-2.0Licence Apache-2.0
• #LLM

Alternative toMicrosoft Copilot

Self-hosted AI assistant that searches your notes and web

• 37,768 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #AI Agents

Alternative toPinecone

Self-hosted vector database for AI similarity search and RAG

• 35,154 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Database

Alternative toGlean

Self-hosted knowledge base with RAG search, AI agent, and wiki

• 34,874 GitHub stars
• MITLicence MIT
• #LLM

Alternative toMem0

Add persistent user memory to any LLM app via API, Apache 2.0

• 31,339 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toRagie AI

Comprehensive multimodal document processing framework

• 23,910 GitHub stars
• MITLicence MIT
• #RAG