tools
Flowise Review 2026 — Best Open-Source No-Code LLM App Builder
Flowise is a free open-source no-code builder for LangChain and LlamaIndex. Build RAG chatbots and AI agents visually. Deploy as API. 30K+ GitHub stars.
Flowise lets developers create assistants, chatflows, agentflows, multi-agent systems, retrieval workflows, and tool integrations through visual builders. It includes APIs, SDKs, a CLI, embedded chat, evaluations, tracing, and self-hosting options.
FlowiseAI announced a code freeze on July 29, 2026, repository archival on August 10, 2026, and end of life on August 31, 2026. The source remains available under Apache 2.0 for community forks, while hosting, infrastructure, and third-party model services may cost extra.
Features
- Visual builders for Assistant, Chatflow, and Agentflow applications
- Multi-agent workflow orchestration with branching, looping, and routing
- Retrieval-augmented generation using files, vector databases, and data sources
- Human-in-the-loop task review and approval flows
- Execution logs, visual debugging, tracing, and observability integrations
- API access, JavaScript and Python SDKs, and command-line interface
- Embedded and shareable chatbot widgets
- Apache 2.0-licensed open-source code for community forks
Use cases
- Build chat assistants that answer questions from uploaded documents
- Create multi-agent systems with coordinated workflow steps
- Connect language models to tools, APIs, vector databases, and data sources
- Embed an AI chatbot in a website or application
- Evaluate and trace agent or chatbot responses
- Fork and maintain the open-source code after the project sunset