How B12 uses AI to generate and launch complete websites—live in under 60 seconds
B12 co-founder Adam Marcus walks us through their powerful, flexible AI website builder.
Published 2025-04-04
Adam Marcus is reimagining website building.
The co-founder and CTO of B12 joined us recently show how his tool turns a simple business description into a polished, end-to-end site in under a minute.
And it doesn’t just generate static content—it builds a living, working website complete with features like scheduling, payments, blog posts, contact forms, and more.
B12 is overhauling the website building process for small businesses and solopreneurs. You don’t need to write a line of code either, or even have a clear vision for your site. B12’s platform lets you tweak as much as you want, using AI or manually.
Here’s a taster of what Adam demoed:
From prompt to publish: A website in 60 seconds
Adam opened the demo with a bold claim:
“Describe the business or website that you're working on … and with that in 60 seconds, as you'll see in a demo here, you'll get a ready-made end to end. You can click publish if you want to!”
To prove it, he created a fictional cleaning business—Sparkling Spaces Cleaning—and typed a brief description into the B12 interface:
“You can say some things that you want on the website, but it's not so strict that you have to get everything right here. Maybe you want to add a blog to share tips for cleaning and you have some sense of what you want it to look like, but you're not totally sure. Or you want the website to have an elegant look and blue accents. You don't have to get it perfect on the first shot.”
The AI tool created the brand new website in just a few seconds, incorporating the blog, styles, and appropriate pages and copy for a cleaning business’s site.
It wasn’t just a skeleton site either. It included features like a customer intake form with detailed, relevant questions for the cleaning business—like “What areas of your home require cleaning?” and “What kind of cleaning services do you require?”
As Adam put it, “In 60 seconds using a few sentences and we have an end-to-end, ready to launch website.”
Don’t like what the AI created? Just regenerate it
One of the coolest parts of the demo was how easy it was to change things—not just by editing text, but by telling the AI what you want instead.
“Maybe I wanna see something different here… I can click the button ‘Regenerate content’ and copy and imagery will just show up with a brand new version of it. There’s cases where you’ll know it when you see it, and you just want to be able to click a button and just page through and see different offerings here.”
You can also give the AI specific image prompts, like “an image of the sun shining through a freshly washed window,” and the system will generate images to match.
And if you change your mind about the entire aesthetic, you can change that too: perhaps an “elegant” look wasn’t for you, so you want to get the AI to give you a “modern” look instead … and regenerate the whole website.
Fully working functionality from day zero
It’s one thing to generate content. It’s another to make the site actually work. B12 makes sure you’re not left with placeholder buttons or broken forms.
“Anything that we place on your website should be working from day zero. You don't have to know how to set up Stripe to get payments working. You don't have to know how to set up calendar syncing in order to get scheduling working. It just works.”
Adam walked through some details on the backend, like connecting your Google Calendar. With payments, B12 handles the Stripe setup for you, creating an account and connecting it to your site—without ever storing any of your sensitive information.
Of course, you have full control over your site’s functionality. If you want to tweak the fields on your intake form, for instance, you can have the AI suggest those, or you can simply add them yourself.
A responsible approach to AI
Adam offered a refreshingly candid take on AI, explaining that part of B12’s mission is to communicate both AI’s benefits and its limitations, saying that with B12 or indeed any AI tool, it’s important to make sure you’re fully happy with the output.
“At the end of the day, this website is speaking to your brand. We're really proud of where we've gotten with these models—they save a ton of time—but at the end of the day, you have to look at the thing and say, ‘Hey, does this represent my brand? Is this how I want to speak to the world?’ And just make sure that you own it and that it's your own.”
To help customers understand the risks and limitations, B12 has published a public guide called How We AI, detailing their approach to transparency and model evaluation.
Want to watch the full recording?
You can see Adam’s demo when you watch the full session here (available to Pro Ben’s Bites members).
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