OpenThorn
Open-source AI website builder. Bring your own API key.
OpenThorn launched on June 16, 2026 with 4 votes, #3,322 of 22,647 launches that month and more than 75% of that year's launches.
What it does
OpenThorn is a free, open-source AI website builder. Connect your own API key from a variety of providers — OpenAI, Anthropic, Gemini, Ollama, and more — and an AI agent plans, builds, and verifies a complete website. Everything compiles and previews instantly in your browser, then deploys with one click. No subscription, no markup on tokens, no lock-in: you pay your provider directly and keep full ownership of the code. An open alternative to Lovable, Bolt, and Base44.
OpenThorn is the BYOK AI website builder — describe what you want, get a complete, deployable website. No subscription, no lock-in.
Describe what you want to build — OpenThorn generates the code, wires up a database and auth, and deploys it anywhere. Frontend or full-stack. Tell OpenThorn what you're building — a storefront, a dashboard, a blog. Plain English is all it takes. Most AI website builders bundle the AI cost and mark it up behind a subscription you can't escape. OpenThorn is different. You bring your own AI keys, pay providers directly, and keep every line of code. Build anything from a landing page to a full-stack app with a database and user auth — no vendor lock-in, no recurring tax. Hook up OpenAI, Anthropic, Gemini - whatever you use. OpenThorn uses your keys only for requests you make. No subscription,…from openthorn.app
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