B12

The easiest AI website builder for sites, stores and web apps

About B12

B12 is an AI builder and vibe-coding platform for websites, online stores and web apps. Describe what you want and its AI agent builds it with you, from the pages people see to the logins, payments and bookings behind them, running backends on Supabase. You can connect tools like Google Drive, Notion, Figma, Calendly and Zapier and have the agent work in them from chat, edit visually or by chat, and launch on a free subdomain or your own domain.

B12 website preview

Live preview of b12.io via the WordPress mShots service — it can take a few seconds to generate on a first visit.

B12: strengths & things to check

Strengths

Free tier available — you can start without paying (freemium model).
Covers website builder, ai agent, ecommerce, vibe coding — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

The full feature set sits behind a paid plan — check which limits the free tier carries on the official site before committing.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 1164 tools in the Developer Tools category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

B12 pricing

Pricing model	Freemium — a free tier lets you start, and paid plans are available if you need more.
Free access	Yes — free tier, paid upgrades available
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	b12.io

B12 key facts

Category: Developer Tools
Pricing: Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas: website builder, ai agent, ecommerce, vibe coding
Official site: b12.io

B12 FAQ

How much does B12 cost?

Freemium — a free tier lets you start, and paid plans are available if you need more. Current plans and prices are listed on the official site (b12.io).

What is B12 used for?

The easiest AI website builder for sites, stores and web apps Its focus areas in the Developer Tools category: website builder, ai agent, ecommerce, vibe coding.

Where can I try B12?

On its official site, b12.io — the Visit Official Site button above goes straight there.

B12 vs alternatives

	B12	10Web	Flexbe	Loopple
Pricing	Freemium — a free tier lets you start, and paid plans are available if you need more.	Paid — this directory does not list a free tier for it.	Paid — this directory does not list a free tier for it.	Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas	website builder, ai agent, ecommerce, vibe coding	website builder, wordpress, ecommerce, app builder	website builder, ecommerce, editor, hosting	website builder, ai agent, free domain, seo
Official site	b12.io	10web.io	flexbe.ai	loopple.com
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Developer Tools category

Editors, platforms, and services developers rely on to build and ship software. The Developer Tools category on Tools Hub currently lists 1164 tools. Alongside B12, it includes GetSite, Pineapple Builder, Websites.ly, Mediaweb.

FreemiumDeveloper Toolswebsite-builderai-agentecommercevibe-coding

Alternatives to B12

Tools in the same Developer Tools category that share focus areas with B12 — worth comparing before you commit:

Developer Tools

10Web

Turn what you have into a website, store or app with one prompt

Paidwebsite-builderwordpressecommerceapp-builder

Developer Tools

Flexbe

AI website builder on a professional cloud platform

Paidwebsite-builderecommerceeditorhosting

Developer Tools

Loopple

AI website builder - create and publish a website for free

Freemiumwebsite-builderai-agentfree-domainseo

Developer Tools

Pagesmith

AI website builder with SEO and AI editing

Freemiumwebsite-builderseoastroai-agent

Developer Tools

Readdy

AI website builder to create and publish functional websites

Freemiumwebsite-builderno-codetemplatesecommerce

Developer Tools

Agentprobe

Free readiness scorer for agentic commerce storefronts

Freeai-agentsecommerceaudit

More in Developer Tools

Comparing tools in the Developer Tools category? These related listings are worth a look: GetSite — AI website builder - build and launch in 60 seconds; Pineapple Builder — AI website builder that grows your business like an agency; Websites.ly — Build stunning websites without code using AI chat.