Pricing
Every site starts free, with no subscription.
Buy AI credits whenever you need them, or choose Pro from $15 a month for forms and your own domain.
Two plans
The free plan publishes the site. Pro adds forms, your domain and higher limits.
Free publishes the site on a MightyBuilder address without requiring a card. Pro adds forms, your own domain, higher limits and the monthly AI allowance you choose.
Free
Every site starts here.
$0
You get:
- 150 credits to build your first site
- Published at yourname.mightybuilder.site, with HTTPS
- A small MightyBuilder badge, lower right
- 100 MB of storage, files up to 10 MB each
- 20,000 page views and 5 GB served a month
- Top up with credits whenever you like
Pro
No monthly limits, forms and your own domain. Pick how many AI credits it tops you back up to each month.
A plan is for one site, and each site is free or Pro on its own. A free site that passes a monthly limit shows visitors a short notice until the month turns over or it moves to Pro; its content stays saved.
Top-up
Top up any site without a subscription.
Buy exactly as many as you need, on a free site or a Pro one, and they never expire. What you do not spend is still yours next year.
Side by side
Exactly what each plan includes.
Compare the allowances and extras in one place. Every AI tool, every page type and the visitor numbers are included on both.
| Free | Pro | |
|---|---|---|
| Price | $0 | from $15 a month |
| AI credits | 150 to start, then top up when you like | Your chosen allowance every month, plus top-ups |
| Address | yourname.mightybuilder.site | Your own domain, or ours |
| Forms | Yes | |
| Largest single file | 10 MB | 25 MB |
| Storage | 100 MB | No limit |
| Page views a month | 20,000 | No limit |
| Data served a month | 5 GB | No limit |
What a credit buys
Credits pay for the AI’s work.
- Asking the AI to build or change your site
- Pictures the AI makes for you
- Web searches the AI runs while it works
Uploading your own files and keeping the site online use no credits, on Free or Pro. Every charge is itemised in your dashboard, with a link to the conversation it came from.
Pricing questions
Is it really free?
Yes. Every site starts on the free plan and is published on its own address at mightybuilder.site. You can start without a card. Your first site also comes with 150 credits, once per person, to build it. The Free allowances are listed in the comparison above.
Do I need a subscription?
No. The free plan publishes the site without a subscription. Buy credits outright at 3¢ each, from 200 credits ($6), when you want more AI work. Purchased credits remain available until you use them. Pro bundles forms, your own domain and a better-value monthly allowance.
What happens when a free site passes a monthly limit?
Visitors see a short notice in place of the site until the start of the next month or until you move it to Pro. The site content stays saved and you can continue editing. The dashboard shows how close the site is to each limit.
What is a credit?
The unit used to price the AI's work. Keeping the site online costs no credits on either plan. A larger job uses more than a small edit, and every charge is itemised in the dashboard beside the request that caused it.
Does Pro roll credits over?
Pro refreshes your included allowance each month. Credits you bought in a top-up stay on top of that allowance, are used after the included credits, and remain until you spend them.
What if I stop paying for Pro?
The site returns to the free plan at its mightybuilder.site address and the free limits apply. Its custom domain and forms pause until you choose Pro again, while their settings stay saved.
Is a plan for one site or for my account?
One site. Each site has its own plan, balance and billing history, so you can choose Free or Pro independently for each one.
Do you charge for connecting a domain or for HTTPS?
Connecting your own domain and automatic HTTPS are included with Pro. Buy the domain from a registrar and keep it in your own account. Every site, free or Pro, also has an HTTPS address at mightybuilder.site.