Bolt.diy
Open-source alternative to Bolt.new — build apps from natural language, bring your own model.
Visit Bolt.diy Open source (BYO API key)
What is Bolt.diy?
Bolt.diy is an open-source fork of StackBlitz's Bolt.new that runs locally and lets you use any LLM — Claude, GPT, Gemini, DeepSeek, or local Ollama models. Same idea: describe an app, get working code and a live preview. No subscription, no token fees beyond what you pay your model provider.
Key features
- Open source (MIT)
- Multi-model support (Anthropic, OpenAI, Google, OpenRouter, Ollama)
- WebContainer in-browser dev environment
- Live preview
- Self-hostable
Pros
- Open source — fully auditable
- BYO model — no markup on tokens
- Works with local models for privacy
Cons
- Less polished than hosted Bolt.new
- You handle hosting and API keys
- Smaller community than commercial alternatives
Best for
Developers who want full controlAnyone with their own API budgetSelf-hosting / privacy-conscious teamsEducators teaching AI-assisted development
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