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The Developer's Choice

.IO Domains
For Sale

The go-to extension for tech startups, SaaS platforms, and developer tools. Join companies like GitHub, Figma, and thousands of successful startups with a .IO domain.

Tech's Favorite

Why Buy a .IO Domain?

The .IO domain extension has become the gold standard for tech startups, developers, and SaaS companies. With over 1.7 million registrations worldwide, .IO represents innovation, technical expertise, and a forward-thinking approach to business.

Originally the country code for the British Indian Ocean Territory, .IO was adopted by the global tech community because "IO" stands for "input/output" in computing. This dual meaning makes it instantly recognizable and relevant for anyone in the tech space.

When a developer or tech-savvy user sees a .IO domain, they immediately understand: this is a technical product, built by people who understand their world.

Developer Recognition

"IO" means input/output in computing. Developers instantly understand the technical nature of your product.

Startup Credibility

YC companies, unicorns, and leading startups use .IO. It's a badge of honor in the tech ecosystem.

Short & Available

Many great .IO domains are still available that would be impossible to get in .COM.

Companies That Chose .IO

Some of the world's most successful tech companies built their brands on .IO domains.

Figma

Design collaboration platform valued at $20B

Socket.io

Real-time engine powering millions of apps

Codecov.io

Code coverage tool acquired by Sentry

Agar.io

Viral browser game with 100M+ players

Other notable .IO companies: Repl.it, Raindrop.io, Draw.io, Atom.io, and thousands of YC startups.

Use Cases

.IO is Perfect For

The .IO extension works exceptionally well for these types of businesses and products.

SaaS Platforms

Cloud-based software products, subscription services, and B2B tools. The .IO extension screams "modern software." See our SaaS domains.

Developer Tools

APIs, SDKs, libraries, and development platforms. Developers immediately trust .IO domains.

Browser Games

Agar.io started a trend—dozens of viral .io games followed. The extension became synonymous with casual web gaming.

Crypto & Web3

Blockchain projects, DAOs, and decentralized apps. The tech-forward nature of .IO fits perfectly.

Tech Startups

Early-stage companies building innovative products. Y Combinator startups frequently choose .IO over unavailable .COMs.

Data & Analytics

Data processing, analytics platforms, and business intelligence tools. "IO" literally means data input/output.

Comparison

.IO vs .COM: Which Should You Choose?

Choose .IO When:

  • Your target audience is developers, tech-savvy users, or startups
  • You're building a SaaS product, API, or developer tool
  • The .COM version is unavailable or prohibitively expensive
  • You want to signal innovation and technical sophistication

Choose .COM When:

  • Your target audience is mainstream consumers
  • You need maximum universal recognition and trust
  • Type-in traffic is important to your business model
  • You're building a consumer brand outside of tech

Frequently Asked Questions

What is a .IO domain?

.IO is the country code top-level domain for the British Indian Ocean Territory. It has become extremely popular among tech startups and developers because "IO" represents "input/output" in computing terminology.

Why do tech startups choose .IO domains?

.IO domains are favored by tech startups because they're short, memorable, and signal technical expertise. With over 1.7 million registrations, .IO is the #1 alternative to .COM for tech companies.

Are .IO domains good for SEO?

Yes, .IO domains perform well in search rankings. Google treats all TLDs equally for SEO purposes. Many successful companies like GitHub, Discord, and Figma have built strong brands on .IO domains.

How do I transfer a .IO domain?

After purchase, we provide you with the authorization code and assist with the transfer to your preferred registrar. Most .IO transfers complete within 24-48 hours.

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