.io · Technology & specialist
Open registration route
Launch a concise domain for a technical product.
Use .io for a developer tool, SaaS platform, API or technology startup with an international audience.
Check here, then carry the exact name into tracked registrar checkout. We may earn a commission if you register.
Why choose .io
It is the country-code domain for the British Indian Ocean Territory but is commonly interpreted in technology as input/output.
.io is popular with software companies, developer products, data tools and startups that value a short technical identity.
Keep ownership
Use your own registrant, billing and recovery details at checkout.
Clear checkout handoff
Confirm the current currency, taxes and total before completing registration.
Control DNS
Connect your website and business email from the registrar account.
Ready for a wider market
Use a recognisable extension for customers beyond one local market.
Best-fit uses
What belongs on .io?
The ending should reinforce the promise in the name—not force a brand into a category it may outgrow.
Developer tools
SaaS platforms
Technology startups
Check the registration rules.
Check current registry policy, geopolitical or policy changes, renewal pricing and rights to the name before committing a core brand.
Compare before you commit.
Choose .dev for developer-specific work, .tech for broader technology positioning or .com for long-term familiarity.
Compare all domain endingsFrom search to ownership
Three clear steps to your .io.
Enter one name
Search the brand you want with .io.
Confirm the signal
Review the availability result, current price and any eligibility requirements.
Register in your name
Continue with the exact domain, complete checkout and retain control of the account.
- Use your own email address and phone number for registration and recovery.
- Check the normal renewal price—not only the first-year promotion.
- Turn on auto-renew and keep the invoice and registration confirmation.
- Record nameservers and business-email DNS before changing providers.
Need to know
.io questions, answered.
What is a .io domain best used for?
.io is popular with software companies, developer products, data tools and startups that value a short technical identity.
Are there special requirements for .io?
Check current registry policy, geopolitical or policy changes, renewal pricing and rights to the name before committing a core brand.
How much does a .io domain cost?
Registration, renewal, transfer and recovery prices can differ. Use the live registrar checkout as the current quote and check the normal renewal price before buying.
Can I transfer a .io domain later?
Usually, yes. Transfer timing, authorisation, locks and any added registration term depend on current registry and registrar rules. Preserve your DNS records and confirm the process before moving it.
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