Langflow

Langflow is a visual builder for AI agents and workflows that lets you drag components together into powerful pipelines, then publish them as APIs in one click.

Overview

Langflow provides a canvas where models, prompts, vector stores, tools and logic nodes snap together into a runnable graph. Each component is inspectable and testable in isolation, which makes iteration fast and debugging far less painful than editing prompts blindly in code.

Underneath the visual layer runs a Python runtime with typed components, so anything you build can be extended with custom code. Langflow supports retrieval flows, multi-agent orchestration, MCP integration and popular model providers, and its one-click API publishing turns a prototype into a backend service instantly. Every component exposes its inputs and outputs visually, so teams can debug where a pipeline goes wrong instead of guessing from final output. Flows can also be version-controlled and shared across projects like ordinary source code.

Key Features

• Drag-and-drop canvas for composing agents and pipelines
• One-click API publishing for every flow you build
• Playground for testing components and whole flows interactively
• Custom Python components for anything the palette lacks
• Retrieval flows with embeddings, vector stores and reranking
• MCP and external tool integration
• Self-hostable via Docker or use the managed cloud

Pricing

Langflow is open source and free to self-host. DataStax-backed cloud options and enterprise plans provide managed hosting, SSO, observability and support, with pricing aligned to usage and team size. Local development is completely free, and cloud options keep costs proportional to how much you actually run.

Who Is It For

Langflow is for builders who think visually: prototypers, solution architects and low-code teams assembling AI workflows, plus developers who want a fast canvas before hardening the logic in code. Educators also favor it, since the canvas makes abstract concepts like retrieval and tool calling immediately concrete for students.

FAQ

Is Langflow free to use?

Yes, Langflow is free and open source, and you can run it locally with no account at all. Enterprise and managed offerings add support and administration features on top.

Does Langflow offer an API?

Yes, each flow becomes an API endpoint with built-in documentation, plus embeddable chat widgets for customer-facing surfaces. Authentication and rate limiting are configurable.

How does Langflow compare to alternatives?

Langflow is more developer-friendly than purely no-code tools because anything can drop into Python, while remaining faster to iterate with than pure code frameworks. Dify offers more built-in production operations; Langflow offers a more flexible canvas. When a visual prototype proves itself, teams often keep the flow as the production definition rather than rewriting it, which is where Langflow earns its place.