.si vs .ai: Which Domain Extension Makes More Sense?
.si vs .ai, compared: $12/yr vs $171 minimum, Google's generic-ccTLD list, and real adoption evidence. Which extension makes more sense for you in 2026?
Choosing between .si and .ai? Here is the honest version: .ai is the proven extension — on Google's generic country-code list, a decade of startup adoption behind it, and a deep aftermarket. .si is the cheap challenger — roughly $12 a year against .ai's $171 minimum, riding a two-week-old political catalyst with zero startup launches to show for it. Price is the only round .si clearly wins. Everything else depends on what job the domain has to do.
.si vs .ai: the side-by-side
| .si | .ai | |
|---|---|---|
| Country / registry | Slovenia (ARNES, register.si) | Anguilla |
| Retail cost | ~$11–12/year, 1-year terms | ~$85–90/year, 2-year minimum (~$171–180) |
| Wholesale | €10/year | $160 / 2-year minimum |
| Google's treatment | Not on generic-ccTLD list → geotargeted to Slovenia | On Google's generic-ccTLD list → treated as generic |
| Registrar availability | 91–92 accredited; GoDaddy does not offer .si | Widely available |
| WHOIS privacy | Not offered — holder email stays public | Available |
| Scale | ~254,000+ total (Oct 2, 2026) | 1M+ active (start of 2026) |
| Startup launches, last 30 days | 0 (ProductHunt tracker via DNW) | 50 |
| Aftermarket depth | Largest post-wave sale: $18,888 (otherwise.si); thin | Deep; routine five-figure sales |
| Brand association | Slovenia / Super Intelligence / systems integration | Artificial Intelligence |
| China tonal note | sǐ = "death" — no help | ài = "love" — helped |
The cost math deserves a straight look. As NotRenewing's Sully framed it: "A .SI registration runs about twelve dollars a year. A .AI is roughly $85 a year with a two-year minimum, which puts you at $171 before you own anything. Fourteen swings versus one." Fourteen lottery tickets are still lottery tickets — but the arithmetic is real, and it's the entire bull case for .si in one sentence.
One more precedent worth knowing: a country code turning into a commercial label is nothing new. Tuvalu's .tv has lived off video platforms for years, and Anguilla's .ai went from ~140,000 domains in 2022 to over a million by the start of 2026, earning the island roughly $7M a year pre-ChatGPT (Neowin, Oct 2). The question isn't whether a ccTLD can be repurposed — it's whether this one has the adoption to follow the same path. So far, it doesn't: new .si registrations overtook .ai within 25 hours of the UN speech (Netcraft), but registrations are not adoption.
For the full story of the .si wave behind this comparison, see our .si market analysis.
When .si makes more sense
- Defensive brand registration. At ~$12 a year, it's cheap insurance — register.si itself advised trademark holders to claim their names on September 30. If you're still deciding whether buying a .si domain makes sense for you, this is the strongest case for "yes."
- A Slovenian audience. It's Slovenia's national extension. The SI thesis is a bonus on top of a legitimate local signal.
- A campaign or product redirect. Buy it, 301 it to your main site, done — no ranking needed, no geotargeting problem.
- A true phonetic hack. Names that genuinely end in "si" (analy.si-style) read naturally and don't depend on the political thesis at all.
- A budget experiment. When the domain is disposable and the downside is twelve dollars, .si is the rational sandbox.
When .ai makes more sense
- A primary site for a global or US audience. Google treats .ai as generic; it treats .si as Slovenian. For anything SEO-sensitive, that single row of the table decides it.
- An AI startup brand. The extension is the message — fifty startups launched on .ai in the last 30 days, zero on .si. Founders vote with their homepages.
- Resale liquidity. The .ai aftermarket is deep and a decade old; the .si aftermarket is five confirmed post-wave sales deep, the largest at $18,888.
- An investor-grade holding. If you're paying for scarcity and proven demand rather than a thesis, .ai is where the evidence lives.
The investor's lens: why cheap is not better economics
This is the part the price comparison hides. The $12 registration fee is why the .si market is flooded: 52% of first-wave Dynadot registrations were immediately listed for resale (Netcraft), and 46,066 September registrations produced five confirmed post-wave sales. Cheap doesn't create demand — it manufactures supply.
.ai's premium pays for proven adoption: a decade of growth, a million-plus names, fifty startup launches a month. .si's discount prices in exactly what the evidence shows: zero adoption so far. Only 3% of new .si registrations are even AI-related by activity type (Hostinger via TechCrunch/aroged) — most buyers aren't playing the SI thesis at all.
Chris Boundikas, who bought .ai domains in 2017, framed the real decision well: consider a hypothetical Caribbean.ai with a $1 million asking price against a Caribbean.si you can register for $20. Those are illustrative prices, not verified listings — but his point stands: "A founder does not have to believe .si is better. They only have to decide that the premium for .ai would be better spent building the business." The threat to .ai isn't that .si is better; it's that .si is good enough for founders who'd rather spend the difference on product.
And the verdict date is already set. As Sully put it: "I'll be watching next year's renewal numbers." September 2027 tells you whether .si was a market or a moment — evaluate any domain before you buy on that basis, not on the registration counter. Note that automated appraisals differ across extensions for exactly these reasons — comparables, liquidity, and search treatment don't transfer one-to-one.
The bottom line
Buy .ai when the domain has to carry the business. Buy .si when the domain has to cost $12. Don't confuse the two jobs — and don't let a two-week-old political catalyst rewrite a decade of adoption evidence.