B12 is an AI website builder that creates websites, online stores, and web apps from plain-language descriptions, with logins, payments, and bookings added by chatting with AI.

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Last Updated Nov 10, 2026
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About

B12 is an AI website builder that lets people create websites, online stores, and web applications by describing what they want in plain language. It addresses the gap between do-it-yourself template builders, which can feel rigid, and hiring a development team, which is often too expensive for small businesses and solo professionals.

The workflow has three steps: describe the project in a prompt, review and refine the AI-generated draft through conversation, and publish when ready. B12's AI Agent can add backends such as user logins, databases, payments, and bookings, which the company says run on Supabase. More than 4 million sites have been created with B12, and the platform also includes tools for SEO, blogging, email marketing, scheduling, contracts, and eSignatures. Users can start from a free plan or, on the paid tiers, work with B12's design and content experts.

Key Features

AI Agent builder: A conversational agent generates a first draft in about two minutes and then edits the design, rewrites sections, or adds backend features based on follow-up messages.
Backends and app logic: User accounts, databases, payments, and booking functionality can be added to a site by asking, without writing code.
Client engagement tools: Intake forms, a contact manager, email marketing and automation, invoicing, and contracts with eSignatures help service businesses attract and manage clients.
Templates and remixable examples: Ready-to-edit layouts cover business sites, portfolios, e-commerce, blogs, and apps, and AI-generated examples can be remixed as starting points.
On-page SEO and conversion tools: Built-in features handle basic search optimization and lead capture on published sites.
Third-party integrations: The platform connects with external tools, including Stripe for payments and a website generator that works from ChatGPT and Slack.
Expert help: Beyond self-service building, customers can hire B12's team for design and content work or get support from its Customer Success staff via chat, email, or scheduled calls.

Pricing & Fees

  • Pricing: A Free plan costs $0 on a b12sites.com subdomain; the Website plan is $24/month (100 AI credits, up to 10 launched projects, free custom domain for the first year); Website + Client Engagement is $78/month (300 AI credits, up to 30 launched projects). New users can try paid plans for $1 for the first 7 days.
  • Free tier limits: The Free plan includes 5 daily AI credits with a maximum of 30 per month, a visual editor with AI chat, and team invitations.
  • Generation speed: B12 states that a complete first draft takes about two minutes from prompt to preview.

Who It's For

B12 is aimed at non-technical builders who want a working online presence without hiring developers. Typical users include solo consultants, law and insurance firms, home service providers, coaches, photographers, and boutique retailers setting up stores or portfolios. It also suits founders and hobbyists who want lightweight web apps, such as expense trackers or task managers, with logins and payments included. Businesses that need intake forms, contracts, and email marketing alongside their site get those in the higher-tier plan rather than stitching together separate services.

FAQ

What is B12?B12 is an AI website builder that creates websites, online stores, and web apps from a text description, with backend features like logins, payments, and databases added through conversation.

Does B12 have a free plan?Yes, the Free plan publishes on a b12sites.com subdomain with 5 daily AI credits (30 per month), and no credit card is required to start.

How much do B12's paid plans cost?The Website plan is $24/month and Website + Client Engagement is $78/month, and new users can start either for $1 for the first 7 days.

How long does it take to generate a site with B12?The company says a complete first draft is generated in about two minutes from the initial prompt.

What integrations does B12 support?B12 connects with tools such as Stripe for payments and offers website generators that work from ChatGPT and Slack.