Open Source #chatbot Projects

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.

Flowise is an open-source, visual, low-code/no-code tool designed to help users build AI agents and sophisticated LLM-powered workflows through a drag-and-drop interface. It features a Node.js backend and a React frontend, along with modular components for integrations and API documentation—making it accessible to both developers and non-technical users.

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.

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