What is the best free alternative to Windmill?
Langflow is the closest free alternative to Windmill: same Workflow Automation sub-category, and it is free. Open source with 138k GitHub stars, free desktop app and free cloud account
Best free Windmill alternatives
Looking for a free alternative to Windmill? Here are 9 workflow automation worth trying — 9 with a free tier. Windmill itself is free.
| Tool | Windmill (you searched) | Langflow | Google Opal | Flowise |
|---|---|---|---|---|
| Pricing | free | free | free | free |
| Best for | Open-source, self-hostable with unlimited executions on the free tier | Open source with 138k GitHub stars, free desktop app and free cloud account | Describe an app in plain language and Opal builds a shareable multi-step AI workflow | Drag-and-drop builder for chatbots, agents and RAG flows |
| Visit | Open ↗ | Open ↗ | Open ↗ | Open ↗ |
Windmill alternatives — straight answers
Are there free Windmill alternatives?
Yes — 9 of the 9 alternatives listed here are free or freemium: Langflow, Google Opal, Flowise, Sim, LangBot. None of them are paid-only.
Is Windmill free?
Windmill is free. There is no paid plan attached to it in the catalog.
How were these Windmill alternatives chosen?
They are the other tools in Workflow Automation, then the rest of AI Agents & Automation, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.
All Windmill alternatives
Browse Workflow Automation →Langflow
Workflow Automation
✦ WhyA Windmill alternative — Open source with 138k GitHub stars, free desktop app and free cloud account.
- Open source with 138k GitHub stars, free desktop app and free cloud account
- Drag-and-drop visual builder for agents and RAG pipelines on top of LangChain primitives
- Deep integrations across major LLMs, vector DBs and Google Cloud/Slack/MongoDB
✦ WhyA Windmill alternative — Describe an app in plain language and Opal builds a shareable multi-step AI workflow.
- Describe an app in plain language and Opal builds a shareable multi-step AI workflow
- Agent step for autonomous multi-step workflows and automated runs
- Chains prompts, Gemini/Veo/Imagen models and tools visually
- Available in 160+ countries, also inside the Gemini app as Gems
✦ WhyA Windmill alternative — Drag-and-drop builder for chatbots, agents and RAG flows.
- Drag-and-drop builder for chatbots, agents and RAG flows
- Self-host free with Docker or npm, with many model and vector store integrations
- Agentflow for multi-agent orchestration
- Embeddable chat widget and API output
✦ WhyA Windmill alternative — Visual canvas for building, deploying and monitoring AI agents and workflows.
- Visual canvas for building, deploying and monitoring AI agents and workflows
- Open source and self-hostable
- Copilot that helps assemble workflows from natural language
- Integrations with common tools and knowledge bases
✦ WhyA Windmill alternative — Builds AI bots for WeChat, QQ, Discord, Slack, Telegram and other chat platforms.
- Builds AI bots for WeChat, QQ, Discord, Slack, Telegram and other chat platforms
- Plugs into Dify, n8n, Coze and other workflow back ends
- Plugin system and web admin panel
- Free and open source, self-hosted
Zapier
Workflow Automation
✦ WhyA Windmill alternative — Connect 8,000+ apps with AI agents.
- Connect 8,000+ apps with AI agents
- Natural-language automation builder
- AI steps, chatbots and tables
- Free tier for basic Zaps
n8n
Workflow Automation
✦ WhyA Windmill alternative — Open-source, self-hostable automation.
- Open-source, self-hostable automation
- Visual AI-agent and LLM nodes
- Full code when you need it
- Free to run yourself
Make
Workflow Automation
✦ WhyA Windmill alternative — Visual drag-and-drop automation.
- Visual drag-and-drop automation
- AI modules and agent scenarios
- 1,000+ app integrations
- Generous free tier
Gumloop
Workflow Automation
✦ WhyA Windmill alternative — No-code canvas for AI workflows.
- No-code canvas for AI workflows
- Web scraping, extraction and enrichment
- Shareable automation templates
- Free plan to start