.io domain search

Find a .io name that feels native to software

Generate ideas, check an exact name or research a shortlist—all scoped to .io.

Compare other extensions

About this extension

What is .io?

.io is the country-code top-level domain for the British Indian Ocean Territory. Its short spelling and long use by software companies have made it a recognisable technology signal, but it remains a ccTLD rather than a generic technology category.

Type
Country-code TLD

The ccTLD for the British Indian Ocean Territory is widely used by technology companies; check current local policy at the registrar.

IANA type
Country-code TLD

Current classification in the IANA Root Zone Database.

Sponsoring organisation
Internet Computer Bureau Limited

IANA records the sponsoring organisation; retail registration is handled by registrars.

The short answer

Is .io a good domain extension?

Choose .io when a technical audience is central and the shorter name is worth the extension premium. Keep a backup plan for renewal and policy changes because the registry is a territory-based ccTLD.

Choose .io when

  • APIs and developer platforms
  • Open-source projects
  • Technical startups
  • Infrastructure products

Consider another extension when

  • Your audience expects a mainstream consumer address
  • The price is materially higher than a relevant alternative
  • You need a country-specific trust signal elsewhere

Research brief

The .io facts that change the decision

This page separates registry policy, public market evidence and registrar pricing. A sample is labeled as a sample; a rule is labeled as a rule; and a checkout quote is never presented as a registry statistic.

Sponsoring organisation

Internet Computer Bureau Limited

IANA records the sponsoring organisation; retail registration is handled by registrars.

IANA .io delegation record

Public market series

Not comparable

No public, current series was found that can be compared with registry totals; FlashDomains does not manufacture a number.

IANA Root Zone Database

Registration model

First come, first served

NIC.IO says applicants may reside in any legal jurisdiction; the extension remains the ccTLD for the British Indian Ocean Territory.

NIC.IO domain rules

DNS at registration

Two working nameservers

NIC.IO requires at least two nameservers when a second-level domain request is submitted.

NIC.IO domain rules

Launch path

.io → certificate → product

Security ready
.io → certificate → productUse .io as a clear product signal, then verify certificates, redirects and every hostname before launch.name.iocertificateproduct

Use .io as a clear product signal, then verify certificates, redirects and every hostname before launch.

Registry context

Registration context for .io

This registry does not publish a comparable public registration series in the cited record. The page shows the verified registration context instead of estimating a total.

Registry signal

Policy checked

Delegation and registration context verified · Current IANA delegation record

Registration terms

See policy

The ccTLD for the British Indian Ocean Territory is widely used by technology companies; check current local policy at the registrar.

Verified .io registration context

Registry policy

Delegation and live-search facts

This extension has no comparable public registration series in the cited record. The page shows its current registration policy instead of estimating a number.

IANA .io delegation record

Familiar in the wild

Who uses .io?

These are recognizable examples, not endorsements or traffic rankings. The useful pattern is how broadly the extension works across industries.

itch.io

itch.io

Indie game marketplace

Sentry

sentry.io

Developer monitoring

Socket

socket.io

Realtime developer library

Availability without guesswork

How to find a strong available .io

Treat availability as the start of the decision, not the finish. A usable name also needs to be easy to communicate, defensible and fairly priced.

  1. 01

    Start with a name that earns .io

    Short .io names are heavily searched by technical teams. Test a clear verb-plus-noun compound and say it aloud so listeners do not confuse the ending with .com.

  2. 02

    Search the exact label first

    Keep the search scoped to this extension, then compare the exact label with closely related endings before accepting a spelling compromise.

  3. 03

    Check rights and pronunciation

    An available result is not trademark clearance. Say the name aloud, check local implications and review the registrar’s final eligibility rules.

Pricing explained

What does a .io domain cost?

The useful number is the full cost of ownership, not the largest promotional figure on a registrar banner.

Lowest verified row: $33.99 for year one

Renews from $69.99

This is the lowest verified provider row, not a recommendation. Compare every available registrar below; a provider gets a price row after its current quote is collected or approved in admin.

NameSiloSource price table
Register$33.99Renew$69.99Transfer$53.49

Standard names only. Prices were source-checked on August 15, 2026; promotional rates, taxes, ICANN fees and premium-name pricing can change at checkout.

Compare the full .io ownership cost

Compare first-year, renewal and transfer prices: .io promotions vary widely and some registrars price it above common gTLDs. Check the exact label for premium status.

Registration options

Where to register a .io

Compare the final registration, renewal and transfer terms. We prioritize the partner best aligned with this market, but the choice remains yours.

Bluehost is our preferred global partner; Namecheap and HostGator remain available as additional checkouts. Prices are shown only when the provider's current quote is verified, so a missing row never becomes a made-up number.

Some outbound links are affiliate links. FlashDomains may earn a commission without changing your price.

NameSilo

Register $33.99 · renew $69.99

Visit registrar

Bluehost

Affiliate

Our primary global registration partner for generic extensions.

Visit registrar

Namecheap

Affiliate

A second checkout option for comparing registration and renewal terms.

Visit registrar

HostGator

A domain and hosting option; confirm the current renewal price at checkout.

Visit registrar

Domain.com

Search and register on Domain.com's official domain page; confirm current availability and terms there.

Visit registrar

Make the tradeoff visible

.io compared with common alternatives

Comparison of .io with alternative domain extensions
ExtensionRecognitionAvailabilityStrongest fitWatch for
.ioStrong with developersCategory-dependentSoftware and APIsccTLD policy and renewal pricing
.comVery highCrowdedBroad commercial and global brandsPremium or awkward remaining names
.orgHighOften betterMission-led and community workMay imply a public-interest purpose
AI naming tools

Use AI for ideas—not fake availability

Copy a focused prompt into your preferred AI assistant, then paste the names it finds into FlashDomains Bulk Search. Test the whole shortlist together—AI can explore language, but live registry and registrar signals confirm domains.

Test names in bulk

Generate .io name ideas

Create 30 short .io names for a developer product that [does X]. Prioritise pronounceable compounds, avoid forced spellings and explain why each ending reinforces a technical audience.

Score a shortlist for clarity

Score these possible .io names: [paste shortlist]. Assess pronunciation, spelling, category fit, unintended meanings and sentence flow. Do not claim availability, trademark clearance or monetary value. Return the strongest three with risks.

Create clean variations

The preferred label [name] is unavailable as a .io. Suggest concise variations that preserve its meaning and suit developer tools, apis and technical products. Reject forced spellings, hyphens and numbers. Do not claim availability.

These prompts help generate and evaluate .io ideas. They do not confirm domain availability, trademark status or price.

Direct answers

.io questions

Updated August 15, 2026. Time-sensitive prices and availability must be rechecked at the registrar.

What is a .io domain?

.io is the country-code top-level domain for the British Indian Ocean Territory. Its short spelling and long use by software companies have made it a recognisable technology signal, but it remains a ccTLD rather than a generic technology category.

How much does a .io domain cost?

There is no universal retail price. Registrars set registration, renewal and transfer pricing, and some names are premium. Compare current rows for the exact name before checkout.

Is FlashDomains the .io registrar?

No. FlashDomains compares availability signals and routes registration actions to a registrar with the searched name filled in. The registrar confirms availability, price and eligibility at checkout.

Is .io a technology TLD?

It is a country-code TLD for the British Indian Ocean Territory that became popular in technology. IANA classifies it as a ccTLD, not a generic technology TLD.

Continue exploring

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