.io
The domain of the tech scene. Popular with startups, developers, and SaaS products due to its Input/Output association.
Enter a name — the extension .io is added automatically. Or enter a complete domain with a different extension.
Bring your domain to us — including an additional year of registration, DNS management and Auto-TLS. For .
You get the AuthCode from your current registrar — depending on the extension it is also called AuthInfo, EPP code or authorization code.
The domain of the tech scene
.io is the country code for the British Indian Ocean Territory, but has long since detached from this geographic meaning. Through its association with "Input/Output", it became the preferred domain of the tech industry.
Startups, SaaS products, developer tools, and API services use .io to signal their technical focus. The extension conveys innovation, modernity, and technical competence.
Well-known examples like GitHub.io, Socket.io, or Figma.io show that .io has become mainstream and is perceived by users as a credible tech domain.
At a Glance
- Registry
- Identity Digital
- Introduced
- 1997
- Origin
- British Indian Ocean Territory
- Minimum length
- 2 characters
- IDN (special chars)
- No
- Restrictions
- None
Who is .io intended for?
Tech startups, SaaS products, APIs, developer tools, open-source projects, developer portfolios. Anyone in the tech industry will find that .io immediately appeals to the right audience.
Input/Output – the association that made .io the tech domain.
Popular tech domains.
- Tech signal to audience
- Short names available
- Modern image
- Popular with startups
- More neutral
- Almost everything taken
- Better known
- Broader audience
No restrictions
Anyone can register a .io domain. There are no residency or company requirements.
Typical use case
A startup is developing a new developer tool. Under devtool.io it's immediately clear: This is about technology. The domain fits the target audience perfectly and conveys the right image from the start.
Many successful tech projects use .io as their primary domain.
Premium character
The higher price filters spam and signals credibility. Those who use .io mean business.
- Global anycast DNS
- SSL certificate included
- No setup fee
Frequently Asked Questions
Everything you need to know about .io registration
-
A .io domain costs €76.03 per year. The price applies to both new registrations and transfers. There is no additional setup fee.
-
.io is a premium domain with high demand in the tech industry. The higher price reflects market value and helps ensure fewer spam domains are registered.
-
.io is ideal for tech startups, SaaS products, APIs, developer tools, and anyone working in the tech industry. The extension signals technical competence and innovation.
-
Registration happens in real time. Once the domain is confirmed, you can create DNS records and use the domain immediately.
-
Yes, .io is the ccTLD of the British Indian Ocean Territory. However, it has long since detached from this geographic meaning and is used worldwide as a tech domain.
-
Request an auth code from your current provider and enter it during ordering. The transfer takes a few days and costs the regular annual price of €76.03.
More domain extensions
Complementary or alternative to .io