10 Open-Source No-Code AI Platforms for Building LLM Apps, RAG Systems, and AI Agents

Introduction

Building an LLM application no longer requires wiring orchestration code by hand. A class of open-source platforms now exposes retrieval, agents, and workflows through visual canvases, web UIs, and plain-English prompts. These tools let developers prototype in minutes and self-host for data control.

This article reviews ten open-source projects across three jobs: building LLM apps, building RAG systems, and building AI agents. Each entry covers what the tool does, its core capabilities, who it suits, and its verified license and repository.

HKUDS AutoAgent

Repository: github.com/HKUDS/AutoAgent · License: MIT · Paper: arXiv:2502.05957