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B12

AI website builder for professional services, with client intake, scheduling and email tools.

Free plan + paidAI app builders
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About B12

B12 generates a website, store or simple web app from a description and pairs it with tools for winning and serving clients: intake forms, scheduling, contracts and e-signatures, invoicing, a contact manager and email marketing. It targets accountants, lawyers, consultants and other professional service firms rather than designers, and it offers help from human experts on top of the AI if you want it. A visual editor with AI chat handles changes after the first draft. The free plan publishes a site on a B12 subdomain; paid plans add a custom domain, more AI credits and launched projects, and the client-engagement features. It runs in the browser and hosts your site.

Best for: Professional service firms that want a site plus client intake and scheduling tools.

Pros and cons

What works

  • Client intake, scheduling and e-signatures in one place
  • Free plan to start on a subdomain
  • Option to get help from human experts

Why people leave

  • Design options are fairly conservative
  • Client tools sit on the more expensive plan
  • Less suited to custom app logic

Top B12 alternatives

See all 5
  1. 1Durable logo
    Durable

    Similar small-business focus with bookings, CRM and invoicing at a lower entry price.

    66.5
  2. 210Web logo
    10Web

    AI builder on WordPress hosting, for those who want a standard CMS.

    62.6
  3. 3Macaly logo
    Macaly

    Prompt-based builder with forms, database and SEO audits.

    55.3
  4. 4Squarespace logo
    Squarespace

    Polished, design-led site builder with scheduling add-ons.

    50.3
  5. 5Wix logo
    Wix

    Broad website builder with AI tools and a large app market.

    48.9

Why people left B12

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

No switching stories yet. If you moved away from B12, review the app you switched to and tell us why.

Reviews

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B12: common questions

Is B12 free?

B12 has a free plan and paid plans. Free plan: $0 on a B12 subdomain (checked on B12's own site).

Is B12 open source?

No, B12 is not open source.

What platforms does B12 run on?

B12 is available for Web.

What are the best alternatives to B12?

The highest-ranked B12 alternatives right now are Durable, 10Web and Macaly. See the full ranked list for pricing, platforms and verified facts.

See all 5 B12 alternatives