B12 combines a website with client intake and front-office tools. Carcin is a workspace for reviewing growth-related work across your existing systems. The products solve different parts of a small business's day.
Start freeFree workspace with starter credits. Paid plans from $19.99/mo; no card to start.
Competitor figures are B12's own listed plan prices. Both companies change plans over time, so check theirs before you buy.
| B12 | Carcin | |
|---|---|---|
| What it is | An AI site builder plus a client operations suite | A workspace for proposing, approving, and tracking bounded business jobs |
| Built for | Professional-services firms | Local and service businesses that need demand |
| Front office tools | Intake, scheduling, payments, invoicing, email marketing, contracts and eSignatures, tier-dependent | Not sold as a client operations suite |
| Marketing work | SEO analytics on Professional. You act on it. | Can propose site, listing, review, and content jobs for approval |
| Listed price | Free · Basic $49/mo · Basic + Client Engagement $78/mo · Professional $199/mo · Advanced $399/mo, listed 2026 | Fixed plans from $19.99/mo with included credits |
| AI metering | 300 AI messages per month on paid tiers | Plan includes credits for work; optional credits are separate |
| Human help | Design and copy update requests on Professional. Optional setup at a one-time $1,999. | Free workspace with starter credits; review each job and its cost |
| Ownership | Check B12's current terms | Keep domains and connected accounts in your name; review exports and provider rules |
B12 pricing and feature tiers as listed in 2026, from b12.io/pricing and independent review coverage. Plans and prices change, so treat this table as dated, not current.
If you are asking "is B12 worth it," the answer turns almost entirely on whether you need what it bundles.
B12 generates a draft site with AI and then wraps a client operations suite around it. Paid tiers bundle client intake, scheduling, payments, invoicing, email marketing, and contracts with eSignatures, tier-dependent, along with 300 AI messages per month on all paid tiers. It is positioned for professional-services firms, and that positioning is coherent: a law practice, an accounting office, a consultancy or a clinic all need a way to take on a client, book them, get a document signed and get paid.
The pricing reflects a bundle rather than a builder. B12 lists a Free plan on a b12sites.com subdomain, Basic at $49/mo, Basic plus Client Engagement at $78/mo, Professional at $199/mo and Advanced at $399/mo with 5 team members and extra seats at $29, as listed in 2026. There is an optional do-it-for-you setup listed at a one-time $1,999.
The Professional tier is the one worth understanding, because it is where B12 stops being pure software. At $199/mo it adds design and copy update requests, meaning people polish the site for you, plus SEO analytics. If your firm wants a human to change a headline without you learning an editor, that is a genuine service and most builders do not offer it.
Both are AI products. The difference is which end of the funnel each one lives at.
B12 is strongest after a customer already knows you exist. Intake, scheduling, contracts, invoicing: all of that is the front office, and the front office only matters once somebody walks in. It is a good front office. It does not go out and find people.
Carcin is a private workspace for inspecting the site and the business surfaces around it. It can propose a page, listing, review, or content job with its assumptions and required access visible. Your team decides what to approve; signup does not launch a campaign across channels.
B12 uses AI to generate a draft site and power an assistant. Carcin uses AI inside a workflow with business context, proposed jobs, approvals, and results. The distinction is not how many messages you send; it is whether a draft becomes authorized work.
Which means these two products sit next to each other more comfortably than most comparisons on this site. A firm running B12 for intake and Carcin for demand is not a contradiction.
B12 gives you site and SEO analytics on its listed Professional tier. Carcin can help inspect search-facing pages, listings, and reviews, then propose a bounded job for your approval. Reporting, drafting, and publishing are distinct states.
Search visibility can depend on a map listing, accurate directory records, reviews, and useful pages. Carcin can help inspect those surfaces and propose a bounded next job for review.
Carcin's paid plans have fixed monthly prices with included credits. Work uses credits; optional credit purchases and third-party spend are separate. Review the cost and scope of a proposed job before approval.
Keep domains and connected accounts under your control where possible. Check the current terms and export options before changing a paid plan or leaving.
A comparison page that only flatters its author is not worth reading. Here is where B12 wins.
Intake, scheduling, payments, invoicing, email marketing, contracts and eSignatures, all tier-dependent and all in one place. Carcin does not sell any of that. For a firm that would otherwise stitch together four subscriptions, B12's bundle is a straightforward win and Carcin has no answer to it.
The Professional tier at $199/mo includes design and copy update requests. If you want to email someone "change this paragraph" and have a person do it, B12 sells that and it is worth something.
B12 lists an optional one-time $1,999 setup for firms that want the whole thing handed over at the start. That is a real product for someone with budget and no time.
B12's Free plan publishes on a b12sites.com subdomain. Carcin starts free with starter credits and then has a paid floor from $19.99/mo. If your budget is zero today, that is not a close call.
You run a professional-services firm, your bottleneck is operations rather than demand, and the intake, scheduling, contracts and invoicing bundle would replace tools you already pay for. B12 is built for that firm and it is honest about it.
You want one workspace to inspect your site, listings, reviews, and content; request a specific job; then review its scope and result. Connected work still needs the right access and approval.
Name your bottleneck before you buy either one. If your calendar has gaps because your admin is a mess, buy the front office. If your calendar has gaps because the phone is quiet, no amount of intake software will fill it, and that is the job Carcin was built for.
Start in the free workspace. Review a proposed first job before anything changes.
Start freeFree workspace with starter credits · Fixed paid plans from $19.99/mo · No card to start
B12 lists a Free plan on a b12sites.com subdomain, Basic at $49/mo, Basic plus Client Engagement at $78/mo, Professional at $199/mo and Advanced at $399/mo with 5 team members and extra seats at $29, as listed in 2026.
An optional do-it-for-you setup is listed at a one-time $1,999.
It depends on whether you need the client tools. B12 bundles intake, scheduling, payments, invoicing, email marketing and contracts with eSignatures, tier-dependent, plus 300 AI messages per month on all paid tiers.
If a law firm or an accounting practice would otherwise buy those separately, the bundle is reasonable. If you only need marketing, you are paying for a client portal you will not use.
B12 combines a site and client operations tools. Carcin is a workspace for inspecting your site and other business surfaces, proposing a bounded next job, and showing its approval and completion state. A proposal is not a published campaign.
B12's Professional tier, listed at $199/mo, adds design and copy update requests, so people polish the site for you, along with SEO analytics. That is real, and it is the honest reason a firm might pick B12 over a pure self-serve builder.
Carcin has a free workspace with starter credits and fixed paid plans from $19.99/mo with included credits. B12's listed plans and services are a different purchase; check its current pricing and compare the specific tools you need. See Carcin pricing.
You can keep the B12 site while evaluating Carcin. A replacement or migration is a separate job requiring content access, parity review, and your approval before cutover. Plan separately for any B12 intake, scheduling, or invoicing tools you rely on.
For AI site builders, see Durable. For DIY editors, compare Squarespace and Wix. You can also compare ChatGPT or agencies, browse the comparison hub, or contact us.