Langflow

!Langflow logo

[!CAUTION] Users must update to Langflow >= 1.3 to protect against CVE-2025-3248.

Langflow is a powerful tool for building and deploying AI-powered agents and workflows. It provides developers with both a visual authoring experience and built-in API and MCP servers that turn every workflow into a tool that can be integrated into applications built on any framework or stack. Langflow comes with batteries included and supports all major LLMs, vector databases and a growing library of AI tools.

✨ Highlight features

• Visual builder interface to quickly get started and iterate .
• Source code access lets you customize any component using Python.
• Interactive playground to immediately test and refine your flows with step-by-step control.
• Multi-agent orchestration with conversation management and retrieval.
• Deploy as an API or export as JSON for Python apps.
• Deploy as an MCP server and turn your flows into tools for MCP clients.
• Observability with LangSmith, LangFuse and other integrations.
• Enterprise-ready security and scalability.

⚡️ Quickstart

Langflow requires Python 3.10 to 3.13 and uv.

1. To install Langflow, run:

uv pip install langflow -U

2. To run Langflow, run:

uv run langflow run

3. Go to the default Langflow URL at http://127.0.0.1:7860.

For more information about installing Langflow, including Docker and Desktop options, see Install Langflow.

📦 Deployment

Langflow is completely open source and you can deploy it to all major deployment clouds. To learn how to use Docker to deploy Langflow, see the Docker deployment guide.

⭐ Stay up-to-date

Star Langflow on GitHub to be instantly notified of new releases.

👋 Contribute

We welcome contributions from developers of all levels. If you'd like to contribute, please check our contributing guidelines and help make Langflow more accessible.

❤️ Contributors