By Holy Odom | Weakening.com
Every once in a while, something catches my attention in domain investing that makes me stop and think, what if we’re looking at something before the rest of the market really notices it?
That’s how I currently feel about .si.
If you’ve been investing in domains for a while, you’ve probably seen extensions get hot before. Sometimes the excitement turns into real demand. Sometimes it turns into nothing more than speculation and a lot of renewal bills.
But .si is interesting to me for a different reason.
Officially, .si is the country code domain extension for Slovenia. It wasn’t created for artificial intelligence, technology or anything connected to the current AI boom.
But those two letters now have another possible meaning.
SI. Superintelligence.
And that raises a question I think domain investors should at least be asking:
Could .si eventually become for Superintelligence what .ai became for Artificial Intelligence?
I’m not saying it will.
I’m saying it’s worth watching.
We’ve Already Seen This Happen With .AI
This isn’t some completely crazy idea when you consider what happened with .ai.
.ai is technically the country code extension for Anguilla.
But ask the average person in technology what AI means today and they’re probably not going to say Anguilla.
They’re going to say Artificial Intelligence.
That second meaning completely changed the identity of the extension.
As artificial intelligence exploded, startups and technology companies began using .ai as part of their branding. Instead of the extension simply being the end of the address, it became part of the message.
A company using a strong .ai domain could immediately tell you something about what it did.
That’s powerful branding.
And once businesses started wanting those domains, something else happened.
Demand increased.
Strong words combined with .ai became valuable digital assets because there were businesses that actually wanted to build on them.
That’s the part of the .si story I’m watching.
We’ve already seen a country code extension escape its geographic identity and develop an entirely different global meaning.
Could history repeat itself?
Maybe.
Why Superintelligence Changes the Conversation
Artificial intelligence isn’t standing still.
The conversation has already moved far beyond simple chatbots.
We’re talking about AI agents, reasoning systems, robotics, automation, autonomous software and increasingly capable models.
And as those systems become more advanced, one word continues to appear in discussions about where all of this could eventually lead:
Superintelligence.
If that term becomes mainstream, the abbreviation SI could become increasingly recognizable.
Think about how natural the letters AI feel today.
We see AI and immediately know what they mean.
There was a time when that wasn’t the case.
Technology changes language.
Language changes branding.
And branding can change the value of domain names.
That’s why .si deserves attention.
The extension already exists. It’s short. It’s clean. It’s established. And if SI develops a second global meaning connected to Superintelligence, suddenly the extension has an entirely different story.
But a good story doesn’t automatically make a good investment.
This Is Where Domain Investors Can Get Into Trouble
Whenever a new trend appears, domain investors want to be early.
I understand it because I’m the same way.
Nobody wants to discover an opportunity five years after all the great names are gone.
But fear of missing out can become expensive.
The first wave usually takes the great domains.
Then people start registering the decent ones.
Then the questionable ones.
Eventually you have investors convincing themselves that almost anything followed by .si is valuable because Superintelligence might become huge.
That’s where I would be careful.
A great trend doesn’t make a bad domain great.
If .si becomes a serious technology extension, I believe the same rules that apply to almost every other extension will still matter.
Quality matters.
Words matter.
Commercial usefulness matters.
Brandability matters.
And most importantly, buyers matter.
What Would I Actually Buy?
If I decided to build a .si portfolio, I wouldn’t want hundreds of names.
I’d rather own a few that I genuinely believed a company could use.
Strong one word domains would immediately get my attention, particularly words connected to intelligence, computing, robotics, automation, agents, reasoning, data, infrastructure, security, research and technology.
But even then, I wouldn’t buy a domain simply because the keyword is related to AI.
I’d look at the entire name.
Does it sound like a real company?
Could I imagine seeing it on an app?
Would it look good on a pitch deck?
Could an entrepreneur build a serious brand around it?
Would somebody remember it after hearing it once?
And here’s one of the biggest questions I ask myself when evaluating almost any domain:
Who would actually buy this?
If I can’t imagine the buyer, I have to question whether I’m investing or simply gambling on a trend.
The Market Will Tell Us Whether .SI Is Real
This is the part I think investors should pay the most attention to.
Domain investors can create hype.
We can buy names from one another. We can list domains for huge amounts of money. We can talk about an extension all day on social media.
But none of that proves real demand.
End users do.
I want to see startups building on .si.
I want to see AI companies choosing .si.
I want to see entrepreneurs putting .si domains on products.
I want to see funded companies using them.
I want to see meaningful reported aftermarket sales.
That’s when the conversation changes.
Because an investor registering a domain is speculation.
A business building its future on that domain is adoption.
And adoption is what can create sustainable value.
The Registration Numbers Make This More Interesting
There is another reason I’m paying attention.
According to official Register.si reports, the extension has been growing.
At the end of 2023, there were 154,630 registered .si domains.
By the end of 2024, that number had increased to 162,648.
At the end of 2025, Register.si reported 172,227 registered domains, representing approximately 6 percent annual growth.
More recently, the registry announced that .si had crossed the 200,000 registration milestone.
Now, let’s be careful with what that means.
.si is Slovenia’s country code extension. Naturally, a significant portion of registrations have nothing to do with Superintelligence.
We shouldn’t look at 200,000 registrations and automatically assume there’s an AI domain boom happening.
But the growth is still worth watching.
If future registrations increasingly come from technology companies and people using SI to represent Superintelligence, that could tell us something very different is developing.
Asking Prices Aren’t Sales
There’s another mistake I don’t want investors to make.
As attention increases, you’re probably going to see premium .si domains listed for big money.
Maybe five figures.
Maybe six figures.
Maybe more.
That’s interesting, but it doesn’t prove value.
An asking price isn’t a sale.
Anyone can list a domain for $100,000.
What matters is whether someone pays $100,000.
I’ve always believed actual sales tell us far more than marketplace asking prices.
So instead of getting excited because someone listed a great .si domain for a huge number, I’m watching for verified transactions.
What sold?
Who bought it?
Was the buyer another investor or an end user?
Did they develop it?
Those answers will tell us much more about the direction of the market.
I’d Rather Own Five Great Names Than 100 Bad Ones
This might be one of the biggest lessons I’ve learned in domain investing.
Registrations feel cheap when you’re buying them.
Renewals don’t feel cheap when you own hundreds.
One domain becomes five.
Five becomes twenty.
Twenty becomes fifty.
Then a year passes and suddenly you’re staring at a renewal bill for a portfolio that hasn’t produced a single serious inquiry.
That’s why I wouldn’t chase .si by registering everything available.
I’d rather own five excellent .si domains than one hundred average ones.
Sometimes the smartest domain investment is the domain you decide not to register.
You don’t have to participate in every trend.
And you definitely don’t have to own hundreds of domains to benefit if a trend becomes real.
One exceptional name can outperform an entire portfolio of mediocre ones.
So, Is .SI the Next .AI?
I don’t know.
And I don’t think anyone honestly knows yet.
That’s what makes this interesting.
There are reasons to pay attention.
The extension is short.
The letters SI can naturally represent Superintelligence.
Artificial intelligence continues advancing.
We’ve already seen .ai transform from a country code extension into a globally recognized technology brand.
And .si registrations themselves are growing.
Those are interesting signals.
But there are still things I need to see.
I want stronger end user adoption.
I want technology startups using .si.
I want meaningful aftermarket sales.
I want SI to become a more widely recognized abbreviation for Superintelligence.
If those things start happening together, then we may have something much bigger.
Until then, I’m watching.
Being Early Doesn’t Mean Buying Everything
One of the most important things domain investing has taught me is that being early doesn’t always mean buying immediately.
Sometimes being early simply means you’re paying attention before everyone else.
You watch.
You research.
You study what companies are doing.
You follow sales.
You look for patterns.
And when the evidence starts lining up, you act.
Maybe five years from now we’ll look back at .si and wonder how we didn’t see the opportunity.
Maybe we’ll look back and realize it was another short lived domain investing hype cycle.
That’s the risk.
That’s also what makes domain investing exciting.
We’re constantly trying to understand what businesses might need tomorrow.
Sometimes we get it right.
Sometimes we don’t.
The goal isn’t to chase every new idea.
The goal is to recognize the right opportunity before it becomes obvious.
For now, my position on .si is simple.
I’m interested.
I’m watching.
And if the right name comes along at the right price, I’d consider buying it.
But I’m not calling .si the next .ai yet.
The market has to earn that comparison.
If Superintelligence becomes one of the defining technology categories of the future, those two little letters could become much more important than they are today.
And if that happens, some of the best .si domains available right now could look very different a few years from now.
That’s why I’m watching.
Because in domain investing, sometimes being early can make all the difference.
But being early isn’t enough.
You also have to be right.
References
IANA Root Zone Database
Official information regarding the .si country code top level domain and registry delegation.
https://www.iana.org/domains/root/db/si.html
Register.si
Official registry for Slovenia’s .si domain extension.
https://www.register.si/en/
Register.si 2025 Annual Report
Official statistics and information regarding .si registrations and growth during 2025.
https://www.register.si/porocila/letno-porocilo-2025/
Register.si 2024 Annual Report
Official .si registry statistics for 2024.
https://www.register.si/porocila/letno-porocilo-2024/
Register.si 2023 Annual Report
Official .si registry statistics for 2023.
https://www.register.si/porocila/letno-porocilo-2023/
Register.si Milestones
Historical information regarding the .si extension and Slovenia’s domain registry.
https://www.register.si/en/30years/milestones/
Disclosure: This article represents my personal analysis and opinion as a domain investor. The possible use of SI as shorthand for Superintelligence is an emerging technology and domain naming thesis. It is not a prediction that .si will achieve the adoption, demand or aftermarket values experienced by .ai.
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Domain investing is full of opportunities you wish you had grabbed sooner. Maybe you missed a great registration, lost an auction, or watched someone else acquire a domain you wanted.
But missing one opportunity doesn’t mean you missed your future.
Read next: Just Because You Lost a Domain Today Doesn’t Mean Tomorrow Isn’t Bigger
One domain doesn’t define your journey. There will always be another opportunity. The key is staying ready when it arrives.
