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.
TL;DR — Top pick
Bolt.new — MIT-licensed — you can fork and self-host the entire AI web builder. The generated code is always yours.
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
- 1Bolt.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
- 2n8n
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
- 3Replit
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
- 4Webflow
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.