Open Source AI Website Builders in 2026
Open source AI website builders let you run the tool yourself, inspect the code, and avoid vendor lock-in entirely. While most popular AI builders are closed-source SaaS products, a small number have released their source under permissive licences — or are built on open-source infrastructure you control.
What open source means here
In the context of AI website builders, 'open source' can mean: (1) the builder itself is open-source and self-hostable, (2) the generated code is open-source and fully yours, or (3) the tool is built on open-source infrastructure. Bolt.new's codebase is open-sourced under the MIT licence on GitHub. n8n is an open-source workflow automation tool with AI features you can self-host.
The open-source options
- 1
Bolt.new
Prompt, run, edit and deploy full-stack web apps
MIT-licensed — you can fork and self-host the entire AI web builder. The generated code is always yours.
- Best for:
- Self-hosted AI web builder
- Pricing:
- MIT, free to self-host
- 2
n8n
Workflow automation for technical teams
Open-source automation platform with AI agent nodes — build AI-powered workflows you self-host completely.
- Best for:
- Self-hosted AI workflows
- Pricing:
- Open-source core
- 3
Replit
Build software collaboratively in the browser
Not open-source itself, but all code you write belongs to you and can be exported at any time.
- Best for:
- Portable code in a hosted IDE
- Pricing:
- Free plan available
- 4
Webflow
Build production websites without writing code
Closed-source SaaS, but exports clean HTML/CSS/JS you can host anywhere — partial portability.
- Best for:
- Exportable marketing sites
- Pricing:
- Free plan available
Buying guide
Self-hosting matters if you have strict data privacy requirements, operate in a regulated industry, or simply want to avoid SaaS pricing forever. For most founders, the ease of Lovable or Bolt.new's hosted version outweighs the overhead of self-hosting.
Verdict
Bolt.new is the strongest true open-source AI website builder thanks to its MIT-licensed repo. n8n covers AI-assisted automation. Replit and Webflow are closed-source but give you portable code or markup.
Frequently asked questions
Is Bolt.new open source?
Yes. Bolt.new (StackBlitz) has open-sourced its codebase on GitHub under the MIT licence. You can fork it, self-host it, and build your own version.
What is the best open-source AI website builder?
Bolt.new is the strongest open-source AI website builder. The hosted version at bolt.new is the easiest entry point; the MIT-licensed source is available on GitHub for self-hosting.
Can I self-host an AI website builder?
Yes, with Bolt.new (via its open-source repo). You will need a server with Node.js and your own LLM API keys. n8n is also fully self-hostable if you want AI-assisted workflow automation.