Best tools to build AI chatbots and assistants
Combine an app framework, a RAG pipeline, and a model API or local runtime to ship a chatbot that answers from your knowledge base.
Recommended tools
Open SourceBeginner
4.7
NEWDify LLM App Development Platform
An open-source LLM application development platform offering visual orchestration, a RAG engine, and Agent capabilities for building AI apps quickly.
DifyLLMOpsApp Development
DifyUpdated 2026-07-09
Open SourceIntermediate
4.7
NEWOpen WebUI
A feature-rich, self-hosted AI chat interface that supports Ollama and OpenAI-compatible APIs and can run fully offline.
Open WebUIInterfaceSelf-hosted
Open WebUIUpdated 2026-06-28
GuideIntermediate
4.6
NEWLangChain Framework Tutorial
Dive into the LangChain framework and master the core concepts of LLM application development, including Chains, Agents, and Memory.
LangChainLLMFramework
AI Resource HubUpdated 2026-06-24
GuideIntermediate
4.5
NEWLlamaIndex Framework Tutorial
Learn to build RAG applications and knowledge base systems with LlamaIndex.
LlamaIndexRAGKnowledge Base
LlamaIndexUpdated 2026-06-26
Open SourceIntermediate
4.6
NEWDeploying Local LLMs with Ollama
Run large language models locally with Ollama, supporting open-source models such as Llama and Mistral.
Local DeploymentOpen SourceOllama
OllamaUpdated 2026-06-25