Open Source #chatbot Projects

Self-hosted RAG chatbot platform that answers visitor questions from your website and PDFs, with a two-line embeddable widget and citations.

Onyx is an open-source AI chat and enterprise search platform with RAG that works with every LLM. Bring your own model, connect your tools, and unify all your team's knowledge.

Sim is an open-source workspace to build, deploy, and orchestrate AI agents and agentic workflows. Visually connect LLMs, tools, and data sources without giving up control.

Open-source AI chat and agent platform with multi-provider support, RAG, plugins, and an agent marketplace — self-hostable ChatGPT alternative.

Open source, drag-and-drop builder for AI agents and LLM workflows. Now archived (EOL Aug 2026) — the Apache 2.0 code lives on for forks and self-hosters.