Head-to-head / .io vs .ai
.io vs .ai
For a startup, pick .ai if you're building anything AI-adjacent — it's the category's default extension now, and the premium buys instant positioning with investors and users. Choose .io for a general developer tool or infrastructure product where the AI label would mislead. When it's a toss-up, .ai has the momentum; .io has the lower price.
This is really a question about what your product is. If it's an AI product, .ai — the category signal is worth the premium and the argument ends there. If it's a developer tool or general tech product, .io still reads perfectly (at a lower price). The trend line matters too: .io is the 2010s incumbent drifting sideways with a geopolitical asterisk over the Chagos transfer; .ai is the ascendant category king. Tie goes to .ai.
When to pick which
Choose .io — Pick .io when your product is developer infrastructure, an API, or a dev tool with no real AI angle. It still reads as a serious technical product, availability for real words is good, and it costs a fraction of .ai.
Choose .ai — Pick .ai when your startup does anything with models, agents, or machine learning. The extension does your positioning for you, availability is far better than .com, and ~$80–160/yr is trivial against the branding win.
Side by side
| .io | .ai | |
|---|---|---|
| Typical price / yr | ~$30–60 | ~$80–160 (2-yr minimum) |
| Category signal | Generic dev / tech | AI-native, unambiguous |
| Registry operator | Internet Computer Bureau (BIOT) | Government of Anguilla |
| Authoritative RDAP data | No — .io is absent from the IANA RDAP bootstrap | Yes — .ai publishes RDAP |
| Long-term status note | Chagos/BIOT transfer to Mauritius is a real asterisk | Stable; renewals fund Anguilla's budget |
| Trend line | 2010s incumbent, drifting sideways | Ascendant category king |
| Our rating | 4/5 | 5/5 |
| Around since | 1997 | 1995 |
| Type | ccTLD (British Indian Ocean Territory) | ccTLD (Anguilla) |
| One-liner | The default startup TLD of the 2010s. Still credible for dev tools, but pricier and no longer novel — and its ccTLD status has a real geopolitical asterisk. | The hottest TLD on earth. If your product is AI, this is the .com of your category — pay up. |
Common questions
Is .ai better than .io for a startup in 2026?
For an AI product, yes — .ai is the category-default extension and the premium is worth the instant positioning. For a non-AI developer tool, .io is still perfectly credible and much cheaper. The deciding factor is what your product actually is, not which extension is 'better' in the abstract.
Is .io safe given the Chagos Islands transfer?
.io is the country-code TLD of the British Indian Ocean Territory, which the UK agreed to transfer to Mauritius. Precedent from retired ccTLDs like .cs and .yu suggests any wind-down would carry years of transition, and there is no active plan to remove .io. It's a real but long-tail risk that .com and generic gTLDs never carry.
How much more does .ai cost than .io?
.ai typically runs about $80–160/yr and requires a two-year minimum registration; .io is usually about $30–60/yr. Renewals for both run well above a .com, so budget for the ongoing cost, not just the first year.
Can I reliably check if a .io or .ai domain is taken?
Yes, but there's a catch worth knowing: .io is not in the RDAP directory, so naive checkers fall back to weaker signals (plain DNS or thin WHOIS) and sometimes show a false 'available'. .ai does publish RDAP. tld.expert resolves both conservatively and never shows a green 'available' unless a registrar confirms it.
Deeper dives: the full .io review and the full .ai review. Not sure a name is even free? Here’s how to check a domain the honest way.