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.io vs .ai

Which domain extension should you choose? Here's how the two compare — and when each one is the better pick.

.io The ccTLD of the British Indian Ocean Territory, adopted by startups and developers because "I/O" means input/output. .ai Anguilla's country code, now the most-wanted domain ending of the AI boom.

Side by side

.io.ai
What it isBritish Indian Ocean Territory's ccTLDAnguilla's ccTLD
Runs the registryInternet Computer Bureau LimitedGovernment of Anguilla
In the root zone sinceEarly ccTLD (date not recorded)Early ccTLD (date not recorded)
Popular meaninginput/output — the startup and developer favoriteartificial intelligence
Search geotargetingccTLD that Google treats as genericSignals Anguilla to search engines
DNSSEC-signedYesYes
Name servers (IPv6)4 (4)6 (6)

Choose .io if…

  • Developer tools, APIs and SaaS products
  • Short, available names that are long gone on .com
  • Tech audiences who read ".io" as a signal, not a red flag

Watch out for

  • Renewal prices are noticeably higher than .com at most registrars
  • The territory's sovereignty is moving to Mauritius, which raises long-term questions about the ccTLD
  • Non-technical customers may still type .com by habit

Still a solid choice for developer tools and tech brands, but know that it rests on a territory whose status is changing. For a company meant to last decades, also hold the .com.

Everything about .io → Register a .io domain (British Indian Ocean Territory) ↗.io WHOIS lookup ↗Sell .io domains via API ↗

Choose .ai if…

  • AI products, agents, model labs and data companies
  • Short brandable names with an obvious "AI" story
  • Product sub-brands (yourbrand.ai alongside yourbrand.com)

Watch out for

  • Prices are higher than .com, and premium names are common
  • The registry has historically required multi-year registrations
  • Hype cycles move — make sure the name still works if "AI" stops being the headline

Worth it if you're building in AI and the name is clean — but expect to pay more than for a .com, and buy for multiple years.

Everything about .ai → Register a .ai domain (Anguilla) ↗.ai WHOIS lookup ↗Sell .ai domains via API ↗

Check one name on both endings

Type a name and see whether it's free as .io, .ai and other endings.

Atak Domain is our sister registrar.

.io vs .ai FAQ

Is .io better than .ai?

Neither is better across the board. Still a solid choice for developer tools and tech brands, but know that it rests on a territory whose status is changing. For a company meant to last decades, also hold the .com. Worth it if you're building in AI and the name is clean — but expect to pay more than for a .com, and buy for multiple years.

Does .io or .ai rank better on Google?

Google doesn't give either ending a ranking bonus. What differs is geotargeting: .io is cctld that google treats as generic, and .ai is signals anguilla to search engines. Content and links matter far more than the TLD.

Can I use both .io and .ai?

Yes, and many brands do: register both, pick one as the main site, and redirect the other to it so links and email never go astray.