8 open-source prompt-to-app builders you can use instead of Lovable, Bolt.new and v0. Self-described alternatives are labelled separately from our own picks.
These projects describe themselves as an open-source alternative in their own README or GitHub description.
onlook-dev/onlook
Visual, AI-first editor for React/Next.js + Tailwind apps: design in the browser and edit the real code.
Says it is an open-source alternative to Bolt.new, Lovable, V0, Replit Agent, Figma (from its README)
Install: Hosted at onlook.com; local dev setup in docs.
Nutlope/llamacoder
Open-source "generate a small app from one prompt" tool (artifacts-style) built on Together AI-hosted open models.
Says it is an open-source alternative to Claude Artifacts (from its README)
Install: git clone, then npm install && npm run dev (needs Together AI key).
e2b-dev/fragments
Next.js template for apps fully generated by AI, executing generated code safely in E2B sandboxes.
Says it is an open-source alternative to Claude Artifacts, v0, GPT Engineer (from its README)
git clone https://github.com/e2b-dev/fragments.gitEditorial picks: open-source projects that do a similar job to Lovable, Bolt.new and v0.
stackblitz-labs/bolt.diy
Community open-source version of Bolt: prompt, run, edit and deploy full-stack web apps in the browser with any LLM you choose.
git clone https://github.com/stackblitz-labs/bolt.diy.git
firecrawl/open-lovable
Clone and recreate any website as a React app from a URL or prompt, using Firecrawl for scraping and your choice of LLM.
git clone https://github.com/firecrawl/open-lovable.git
wandb/openui
Describe a UI in plain language and see it rendered live as HTML, with export to React/Svelte; works with OpenAI, Groq, Ollama and LiteLLM models.
docker run --rm --name openui -p 7878:7878 -e OPENAI_API_KEY -e ANTHROPIC_API_KEY -e OLLAMA_HOST=http://host.docker.internal:11434 ghcr.io/wandb/openui
abi/screenshot-to-code
Drop in a screenshot or mockup and get HTML/Tailwind/React/Vue code generated by GPT, Claude or Gemini models.
Install: Run backend (Poetry) + frontend (yarn) or docker compose per README; hosted version at screenshottocode.com.
Stars, licences and last-commit dates come from the GitHub REST API, fetched 17 Oct 2026. Archived repos, repos with no commit in 12 months and non-open licences are excluded. Install commands are copied from each README.
Our picks: Onlook, LlamaCoder, Fragments by E2B, bolt.diy, Open Lovable, OpenUI, screenshot-to-code, Dyad. Each one is open source; check the licence before commercial use.
Onlook, LlamaCoder, Fragments by E2B describe themselves as an open-source alternative in their own README or repo description.
The software is free to use under its licence. You still pay for your own hosting and for any model API you connect, unless you run a local model.
Cursor · GitHub Copilot · Claude Code · ChatGPT · Perplexity · Notion · NotebookLM · Vercel, Netlify and Heroku