Langflow
Open-source visual builder for AI agents, RAG apps and MCP servers, with Python customization and API deployment
Langflow is an open-source, low-code tool for building and deploying AI agents, RAG applications and MCP servers. Developers assemble flows by dragging components onto a visual editor, then serve each flow as an API.
Key features:
- Build flows with drag-and-drop components and visual state.
- Customize any component in Python.
- Swap and compare models inside a flow.
- Run a single agent or a fleet of agents that use components as tools.
- Start from hundreds of pre-built flows and components.
- Connect to OpenAI, Anthropic, Amazon Bedrock, Ollama, Pinecone, Qdrant, MongoDB, Notion, Slack, GitHub and more.
Langflow is open source under the MIT license, installs with pip and can be self-hosted, or run on a free cloud account with the same Langflow in both. An enterprise-grade cloud is offered for production deployments.