How-to

Buying extra domains (the £4/mo add-on)

How to add monitored domains beyond your plan's included count using the £4/mo per-domain add-on — available on any paid tier.

1 min readLast updated 14 June 2026
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Each plan includes a set number of domains (Free 1, Starter 5, Pro 25, Business 100). If you need to monitor a few more without jumping up a whole tier, use the Extra domains add-on.

What it costs

£4/mo per extra domain, charged on top of your plan. There is no feature difference for an add-on domain — it gets every feature, exactly like an included domain.

Availability

Extra domains are available on paid tiers only (Starter, Pro and Business). The Free plan does not support add-ons — upgrade to a paid tier first if you need more than one domain.

How to buy

  1. Open the DMARC app at https://dmarc.blankitt.com.
  2. Go to Settings.
  3. Find the Extra domains section.
  4. Add the number of extra domains you need. Your total allowance becomes your tier's included domains + extra domains.
  5. Then go to the Domains page to add the actual domain(s) you want to monitor.

When to use add-ons vs upgrading

  • A few domains over your tier (say, Starter + 3 extra)? Add-ons are usually cheaper.
  • Many more domains, or you also want longer retention? Upgrading to the next tier may be better value, since upgrading raises both the domain count and the retention ceiling. Compare the numbers in Plans and pricing.

Billing

The add-on is billed through your Blankitt Portal account alongside your plan. See invoices and payment method at https://portal.blankitt.com/billing.

See also: Plans and pricing and Upgrade, downgrade or cancel your plan.

Still stuck? Email support or open the support widget in the bottom-right.