AI Search Open Source Tools

InAI & Machine Learning

Multi-agent simulation engine that predicts real-world outcomes

• 80,960 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toChatGPT

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

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

Alternative toAmazon Kendra

AI-powered document understanding with explainable retrieval

• 39,352 GitHub stars
• MITLicence MIT
• #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 toPerplexity AI

AI-powered answering engine for private, cited web searches

• 37,553 GitHub stars
• MITLicence MIT

Alternative toPinecone

Self-hosted vector database for AI similarity search and RAG

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

Alternative toAlgolia

Fast typo-tolerant search engine with instant results

• 27,014 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toPinecone

Rust vector index with TurboQuant compression, no managed service

• 17,408 GitHub stars
• MITLicence MIT
• #RAG

Alternative toPinecone

AI-native vector database for semantic search and AI apps

• 16,894 GitHub stars
• BSD-3-ClauseLicence BSD-3-Clause
• #Database

Alternative toPlex

Open source web UI for media streaming, powered by community addons.

• 14,704 GitHub stars
• GPL-2.0Licence GPL-2.0
• #Video