Langflow
FreeLangflow is a powerful tool for building and deploying AI-powered agents and workflows.
FreeFree tier
About Langflow
Langflow is an open-source, low-code visual builder for creating and deploying AI agents and Retrieval-Augmented Generation (RAG) applications. It comes with batteries included, supporting all major LLMs, vector databases, and a growing library of AI tools. Users can visually design state flows, reuse components, and iterate rapidly without writing boilerplate code. For advanced control, Python customization is available. Langflow enables running single or fleet agents, exposing flows as APIs, and deploying on a free enterprise-grade cloud platform. With hundreds of pre-built flows and components, it accelerates the journey from notebook to production.
Key Features
Low-code visual builder for agentic and RAG applications
Supports all major LLMs, vector databases, and a growing library of AI tools
Visual state flows and reusable components
Python customization for limitless control
Deploy as API or on enterprise-grade cloud
Hundreds of pre-built flows and components
Fleet of agents with access to all components as tools
Drag, drop, and deploy workflow
Pros & Cons
Pros
- Open-source with MIT license, free to use
- Low-code visual interface reduces development time
- Supports a wide range of integrations: LLMs, vector stores, tools
- Allows Python customization for advanced users
- Provides pre-built components and flows for quick start
- Offers free cloud deployment option
Best For
Building AI agents and agentic workflowsDeveloping RAG (Retrieval-Augmented Generation) applicationsCreating MCP (Model Context Protocol) serversVisual prototyping and rapid iteration of AI workflowsDeploying AI applications to production with API or cloud