B12

B12 is an AI website builder that generates a complete first draft site in about two minutes and adds client-facing business tools, for consultants, accountants, law firms, agencies and other professional service businesses. What separates it from design-led builders is everything around the site: intake forms, email marketing, contracts with eSignature and payments live in the same account. That makes it closer to a small practice's online front office than a pure page designer.

What is B12 used for?

B12 is used by service firms to get a credible website live quickly and to handle the steps that turn visitors into clients.

• Generating a full website, store, portfolio, blog or simple web app from a short description
• Editing pages in a visual editor and asking the AI chat for changes
• Collecting new client details with intake forms and tracking them in a contact manager
• Sending email marketing and automated follow-ups
• Sending contracts for eSignature and accepting payments
• Hiring vetted designers, copywriters or SEO specialists through the B12 expert marketplace

Who B12 is best for

B12 is best for solo professionals and small firms in fields like accounting, law, financial advice, coaching and consulting, where the website mainly needs to build trust and capture inquiries. Design-focused brands that want full creative control, or online stores with large catalogs, will find more flexibility elsewhere.

B12 pricing

As of October 2026, B12 has a free plan that publishes a mobile-responsive site on a b12sites.com subdomain, with 5 daily AI credits up to 30 per month, the visual editor and team invites. The Website plan costs $24 per month and adds a free custom domain for the first year, 100 AI credits per month, up to 10 launched projects, commerce, backends, analytics, integrations and removal of B12 ads. Website plus Client Engagement costs $78 per month and adds 300 AI credits, up to 30 projects, a custom email address, client intake, email marketing, a contact manager, contracts and eSignature and file uploads. New users can try paid plans for $1 for the first seven days, and yearly billing is also offered.

Limitations to keep in mind

• The most useful client tools are only on the higher $78 plan
• Free plan sites stay on a B12 subdomain with B12 branding
• The custom domain is free only for the first year
• Design flexibility is narrower than designer-focused tools

B12 vs alternatives

Durable is the closest competitor, also aimed at small businesses with a fast AI site plus invoicing and CRM features, and it is worth comparing on price. Framer AI is better for design-led brands that want more visual control and polished animations. Loki.Build is a lighter option for quick landing pages. B12 wins for professional service firms that want intake, contracts, payments and email marketing attached to their website.

Tips for getting started with B12

Describe your services, location and ideal client in the first prompt, since the draft copy is built from it. Use the $1 seven-day trial to test the custom domain and client tools before committing. Set up an intake form on your contact page early, so every inquiry lands in the contact manager. If writing is not your strength, consider a one-off copywriter from the expert marketplace for your home and services pages.

B12 FAQ

Is B12 free?

Yes, B12 has a free plan that hosts your site on a B12 subdomain with limited AI credits. Paid plans start at $24 per month.

How long does B12 take to build a website?

B12 generates a complete first draft website in about two minutes from your prompt, which you can then edit.

Does B12 include tools beyond the website?

Yes, the Website plus Client Engagement plan adds client intake, email marketing, a contact manager, contracts and eSignature.

What is the best alternative to B12?

Durable is the closest alternative for small businesses, while Framer AI suits brands that want more design control.