Langflow
Open-source Python-based visual builder for AI agents, RAG pipelines and MCP servers.
Updated · AppBreakup editorial · Web, Windows, macOS, Linux, Self-hosted
Is Langflow free?
Yes, free and open source
- License:
- MIT
Checked on Langflow's site Nov 8, 2026
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- Alternatives ranked
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About Langflow
Langflow is a low-code tool for building AI agents and retrieval-augmented apps on a visual canvas. Each block is a Python component: models, prompts, vector stores, document loaders, tools and agents. You connect them, test the flow in a built-in playground, then serve it as an API endpoint or expose it as an MCP server that other AI clients can call. It isn't tied to one model vendor and works with OpenAI, Anthropic, Ollama, Mistral, Bedrock and many vector databases. Developers can open any component and edit its Python code, which gives more control than closed no-code builders. Langflow is MIT licensed and free to self-host. It installs with pip or uv, runs in Docker, and there's a Langflow Desktop app. The project also points to a free hosted cloud for deployment. It suits developers and technical teams who want to prototype agents visually but keep the option to drop into code. Non-technical users may find it less approachable than hosted chatbot builders.
Best for: Developers prototyping AI agents and RAG flows visually who want Python-level control.
Pros and cons
What works
- MIT licensed and free to self-host
- Every component is editable Python code
- Can expose flows as MCP servers and connect to external MCP tools
- Works with many LLM providers and vector stores
Why people leave
- Assumes some understanding of LLM concepts like embeddings and vector stores
- Self-hosted production setups need your own scaling and monitoring
- No built-in channel integrations like WhatsApp or live-agent handoff
Langflow vs n8n, Botpress and Voiceflow
From each app's listing and the prices verified on its own site. A dash means we haven't verified it yet.
| Attribute | Langflow | n8n | Botpress | Voiceflow |
|---|---|---|---|---|
| Pricing | Open source | Free plan + paid | Free plan + paid | Paid |
| Verified price | — | €20/month (annual), 2.5K executions | $150/month billed annually (Plus) | — |
| Free plan | Free app | Yes | Yes, $0 with 100 conversations | No |
| Open source | Yes | No | No | No |
| Self-hostable | Yes | Yes | No | No |
| Platforms | Web, Windows, macOS, Linux, Self-hosted | Web, Self-hosted | Web | Web |
Top Langflow alternatives
See all 5- 1
n8n71.8Better if your AI flows are part of wider business automations, with hundreds of app connectors built in.
- 2
Botpress64.8Hosted bot platform with channels, human handoff and analytics, so less infrastructure to run.
- 3
Voiceflow61.8Friendlier for non-developers and product teams designing customer-facing chat and voice agents.
- 4
MindStudio59.4No-code agent builder with 200+ models included, no API keys or servers needed.
- 5
StackAI57.5Managed enterprise agent builder with SSO, audit controls and VPC or on-prem deployment.
Why people left Langflow
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Langflow: common questions
What is Langflow?
Langflow: Open-source Python-based visual builder for AI agents, RAG pipelines and MCP servers. Best for developers prototyping AI agents and RAG flows visually who want Python-level control. Available for Web, Windows, macOS and Linux, and you can host it yourself.
Is Langflow free?
Yes. Langflow is free, open-source software that you can host yourself.
Is Langflow open source?
Yes. The source code is on GitHub at langflow-ai/langflow. You can also run it on your own server.
What platforms does Langflow run on?
Langflow is available for Web, Windows, macOS, Linux and Self-hosted.
What are the best alternatives to Langflow?
The highest-ranked Langflow alternatives right now are n8n, Botpress and Voiceflow. See the full ranked list for pricing, platforms and verified facts.
Langflow vs n8n: what's the difference?
Langflow is free and open source; n8n is free with paid plans. Langflow is open source and n8n is not. Only Langflow runs on Windows, macOS and Linux.