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TLD guide

.io domain guide

.io works well for technical, product-forward names and is common in startup naming.

Price snapshot

First year
$28.12
Renewal
$51.80
Renewal multiple
1.84×
5-year total
$235.32

No renewal trap: the renewal price is close to the first-year price, so the cost stays predictable.

Prices in USD from the Porkbun snapshot dated October 12, 2026. Other registrars may differ.

Search .io names

Good fit when

  • Product launches, AI tools, developer utilities, and startup naming rounds.
  • Run the full domain through live availability before committing brand work.
  • Short roots often work better because the suffix already carries meaning.

Watchouts

  • Country-code TLDs can carry local expectations even when globally reused in technology branding.
  • Check registrar support first because not every suffix is sold everywhere.
  • Use live registry data for the final decision, not cached marketplace assumptions.

Example combinations

modelgrid.iopromptflow.ioshipfast.io

Use these as naming references, then check your real root before deciding.

Porkbun

Register from $28.12

Snapshot: Oct 12, 2026

Open registrar

Cloudflare Registrar

Open the registrar for the live price

Snapshot: Apr 8, 2026

Open registrar

Spaceship

Open the registrar for the live price

Snapshot: Apr 8, 2026

Open registrar

Next steps

Check .io namesCompare in bulkMore TLD guides

Suffix coverage catalog snapshot: October 12, 2026.