Free · No credit card · Runs in your browser
Build websites, apps and tools with AI, free in your browser.
Describe a website, web app or tool, and Capybuild builds it in a sandbox. Bring your own files. Download your project anytime.
Sign up to be alerted See how it works
Free to use, supported by ads. Web first. Android app coming soon.
Not launched yet. Details may change before launch.
Why you'll want it
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Free to use
No credit card and no subscription. The free tier is supported by unobtrusive ads.
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Pick your AI model
Choose from several AI models. Cheap, fast ones are on the free tier. Optional low-cost credit packs give you more usage.
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Sandboxed projects
Each project is sandboxed and can hold several chats that share the same files.
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Bring your files
Upload images, assets or an existing project to Uploads and use them in any project.
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Take it with you
Every project exports as a standard .zip you can open anywhere.
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Websites, apps and tools
Build websites, web apps, internal tools and other software, right in your browser tab.
How it works
Launch the app
Open Capybuild in your browser, no install or credit card needed.
Pick a model
Start with a fast model on the free tier.
Describe what you're building
A website, a web app, a tool or something else. The agent builds it in a sandbox.
Sign up to be alerted when we launch.
Just your email, nothing else required. We'll alert you when the web app and Android app launch.
Questions
How is it free?
The free tier is supported by unobtrusive ads. If you want more usage, optional low-cost credit packs will be available. There's no subscription, and you don't need a credit card to start. Pricing and limits aren't final yet.
Which AI models can I use?
You'll be able to pick from several models. Cheap, fast ones are on the free tier. The exact lineup isn't final yet, so we're not listing specific models.
Can I use my own files and take my code with me?
Yes. Upload files, folders or a .zip to your Uploads area, and the agent in any of your projects can pull them into its workspace. You can download any project as a .zip at any time. Storage limits aren't final yet.
What about privacy?
Your projects and chats are sandboxed. This sign-up page stores only your email (and your optional answer to "what will you build?"), uses no tracking cookies, and has no third-party analytics. We use your email only to tell you about the launch, and we never sell or share it. See the privacy page.
Will there be an Android app?
An Android app is planned and coming soon, after the web app. We don't have a date or details to share yet.
When does it launch?
We haven't set a date. Sign up and we'll alert you when we launch.