SEO people use “cannibalization” when two URLs on one site fight for the same query. Google’s notes on canonical URLs exist because search engines hate that fight. Domain investors create a dumber version: they register three names for one idea, split type-in, split inbound mail, and then wonder why none of them looks like the real company.
This URL is unchanged. I’m Mostapha; I buy and sell domains from Morocco. I used to “cover” a keyword with a .com, a hyphen, and a .net. I paid three renewals and could not tell a buyer which name was the asset. Score each string separately in the Domain Value Checker — the extra names usually fail on their own. FAQ.
One company, one public name
Buyers of a real brand do not want a kit. They want the name they will print. If you are holding brand.com and brand.net and get-brand-online.com, you do not have a strategy. You have a small cannibalization problem at the registrar. The .net rarely sells for a premium because of the .com; it sells as a defensive leftover, if at all. Comps live on NameBio. You will not find a line that says “sold higher because the seller also owned four variants.”
If the checker already says the hyphenated variant is leftover inventory, do not keep it “to protect the main name” unless you have a documented trademark fight. Protection without a mark is usually just another renewal. See UDRP if the conflict is actually legal.
When extra names are not a portfolio
A portfolio is a set of names that can each find a different buyer. That is how a list grows, not a pile of spellings of the same word. If two names would sell to the same shop, you will only sell one. The other is a yearly fee. That pattern is in why most investments fail.
History makes it worse. If variant B was a doorway in Wayback, pointing it at the same lander as variant A can smear both. Audit each host: history steps. Do not 301 a spam name onto a clean one “for the link juice.” That is the old SEO move this URL used to teach, and it is how you import a problem.
If you actually run a site
Then classic cannibalization is real: two articles, one intent, and both rank for nothing. Fix it on the site with a single URL and a canonical, as in Google’s duplicate URL guidance. That does not require buying a second domain. If Search Console shows the wrong host (www vs apex, http vs https), that is DNS hygiene; treat nameservers as part of the asset, not a reason to register more names.
What to drop
- Run every variant through the checker.
- Keep the one a stranger would type. Drop or cheap-sell the rest unless a lawyer told you to hold them.
- Do not 301 garbage onto the keeper. Let junk expire on its own host.
If you are about to register “just one more spelling,” stop: before you buy. Extra names that fight the main one are not coverage. They are cannibalization you pay for every year.