For the last half-decade, the tech industry has been dominated by one particular innovation: artificial intelligence or AI. If you’ve somehow missed it (and we doubt that, as you’re currently reading a blog article on a domain reseller’s website) this technology is currently based on using Large Language Models (LLMs) that gather in enormous amounts of data, using machine learning to predict increasingly complex and complicated processes. And now those LLMs are being used to do things that used to require human thinking, such as speech recognition, coding, planning strategies and creating pictures of cute animals. This artificial ‘thinking’ has led to it being described as AI.

This probably isn’t news to you, nor is it news that the AI industry has completely dominated the global markets, and is driving growth across many sectors. This includes the domain industry, where the tiny little Caribbean island of Anguilla has had its ccTLD, .AI, explode in popularity. It’s the type of disruption that clever domain resellers keep an eye on, because if you can spot the pattern early, there’s profit to be made.

Which brings us to September’s news. There’s been a move in the US government to officially refer to artificial intelligence by a new name, one that better reflects its position as the dominant technology of the 2020s: Super Intelligence, or SI. We’re not going to go into the politics of it, because what matters for resellers is the downstream effect.

The key point is that people are interested in the topic and want domains that reflect it. Which is why, in this article, we are going to talk you through the difference between .AI and .SI domains.

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.SI and .AI Domain Growth Statistics

In 2018, there were just short of 50,000 registrations of Anguilla’s .AI domain. In 2026 they’re expected to grow from a million total, to a forecasted end of year at around 1.7 million. That’s the type of growth that belief in the AI industry is driving. In fact, revenue from the .AI TLD that, in 2025, made up 47% of the Anguillan government’s annual budget.

Which brings us to another ccTLD: the .SI domain. It’s the domain for Slovenia, a Central European country that is home to about 2 million people, and is known for its Alpine mountains, beautiful caves and culture. As a domain, it did solid duty, attracting a little less than 200k registrations in mid-September 2026. But that was before the talk around Super Intelligence.

In the short time since the discussion turned to SI, the number of .SI domains has more than doubled, to over 450,000, and the pace of registrations continues. It has gone from 3,515 new registrations in August 2026, to 46,066 in September (almost all over the last week) and a further 250k during October! It remains to be seen whether it will have the same lasting impact as the other accidental AI TLD, but right now speculation and new ventures are driving rapid growth.

What Domain Resellers Need to Know about .SI and .AI

If you prefer to read the hard facts and figures, here are the key ones you need to compare .AI vs .SI.

Plus, here’s a few more numbers worth knowing:

• Anguilla earned around $93 million from .AI in 2025, roughly 47% of its government budget.
• The number of accredited .SI registrars rose from 91 to 103 in the month after the announcement.
• Buyers came from everywhere. In one 24-hour window, India accounted for 25.5% of new .SI registrations and the US for 25.2%.
• Short names did the heavy lifting. Only around 3% of new .SI registrations in that window were “AI” names.
• The aftermarket is live. OpenRouter.si and Staffing.si each sold for $50,000 in October 2026.

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What Is Super Intelligence?

Before we get too sucked into the numbers, let’s take a moment to make sure we know what we’re talking about with regard to Super Intelligence. Because if you plan on selling .SI domains to your customers, you should have an idea why they would want it.

Artificial Intelligence vs Super Intelligence

Let’s start with the most obvious .AI vs .SI question: what’s the difference between artificial intelligence and super intelligence? The short, simple answer is not a whole lot. They’re being used as different terms for the same product, with Super Intelligence being used by the US government on official documents since an executive order was signed on 29 September 2026.

The more complicated answer is that artificial intelligence refers to the broad category, while superintelligence (one word) refers to a specific point on a scale of how developed or intelligent your AI is. This is a range starting with artificial narrow intelligence, which is where we are now. Things like Siri or ChatGPT. The next hurdle is artificial general intelligence, which is an AI that can think, reason, and learn at the same level as a person, including the elusive common sense. We’re some distance from there. Finally, artificial superintelligence is one that is smarter than us in ways we can’t understand. Because it’s smarter than us.

Why technology leaders are discussing Super Intelligence

There is a split on how the new name has been received. It can best be seen in how the Magnificent 7 – seven tech giants that dominate the S&P 500 – responded to the change. Some are all on board, some prefer the original, aspirational term of superintelligence and some are more skeptical. They all firmly believe that superintelligence is the future, but are not all certain that Super Intelligence is the present (note the different spellings).

How Super Intelligence could influence future technology branding

What is certain is that Super Intelligence is going to be a big deal in the world of startups and cutting-edge technology firms. Whether they’re chasing the dream of an AI super intelligence from beyond the singularity, or simply using a term that is going to become more and more a part of the discussion around artificial intelligence to associate their companies with that frontier tech, the reality is that there is a good chance super intelligence is here to stay. Though maybe not in form that kicked off the current hype-cycle.

What Are .SI Domains?

We’re here because of .SI domains, so what are they and how do they relate to super intelligence and AI?

Understanding the .SI domain extension

.SI is the ccTLD for Slovenia, in Central Europe. It is run by Register.si, operated by ARNES (Academic and Research Network of Slovenia). It has open registration requirements, meaning that anyone can buy .SI domains without needing to have a local presence in Slovenia. Originally, it was for Slovenians and business involved with Slovenia.

Why .SI domains are attracting attention

The recent push to use the term Super Intelligence has moved a lot of speculators and tech startups to consider using .SI vs .AI domains. They’re looking to pick up high-value domain names early, when there is still a lot of inventory available. Many of the early rush of registrations have focused on short, easily brandable names. And that’s reflected with many of these new registrations immediately being listed for resale.

The connection between .SI domains and Super Intelligence

Sometimes life brings us happy little accidents. Artificial Intelligence was a mouthful, so people said AI, which was Anguilla’s domain name. The same has happened with Super Intelligence being shortened to SI, which matches up with Slovenia’s .SI domain.

.AI vs .SI Domains: What’s the Difference?

Despite being domains that are being used for the same technology, .SI and .AI domains have distinct advantages and disadvantages in the current market. Let’s dig into them.

Branding advantages of .AI domains

Everyone has heard of AI. It’s the hot tech that’s being added to every single piece of software and hardware that can fit it. So, resellers that offer the .AI TLD are giving their clients domains that immediately tell their own customers what industry they’re in and what they do.

Branding advantages of .SI domains

Choosing to use a .SI domain for your tech startup sends immediate branding signals, both alignment with term the US government uses, as well as the deep-tech foresight versions. But more importantly, for customers looking for specific names, there are many more available .SI domains than there are .AI (or, of course, .COM). Being able to get the exact name you want is worth it when building a brand.

.AI vs .SI domains for technology companies

For tech companies that are choosing between .AI and .SI domains, there are a few important things to consider. First, availability: there are more available strings in .SI than .AI. The second is your target market: if you’re going to be dealing with the US government or aligned groups, the new executive order requires the use of Super Intelligence and SI in official correspondence, reports, websites and policy documents. Mirroring that will give your offering extra oomph. For now.

On the other hand, .AI is the established market term and will take some overthrowing. Ultimately, both .AI and .SI are great TLDs for businesses working with LLMs, machine learning and similar technologies.

Could .SI Domains Follow the Success of .AI Domains?

The short answer to this is: probably. But with the caveat that it might never overtake the established term. Let’s dig into why.

How technology trends drive domain adoption

The internet goes through hype cycles, as new technological innovations push forward, domains naturally follow. Either the names before the dot, or the TLDs after. We’ve seen this with the proliferation of Web3 domains, and we’ve seen it with the .AI domain. Every new type of online business drives domain adoption.

What domain resellers can learn from the rise of .AI

.AI is one of the domain industry’s massive success stories, exploding as a home for artificial intelligence companies and products. It’s grown to over a million registrations and continues to gain new ones every day. Resellers who started offering .AI early will have benefited from enormous growth. And while it’s still a good idea to sell .AI domains today, the best names are already gone. The .SI domain’s rush is just starting, and there’s still an opportunity to start selling .SI domains early.

Factors that could drive demand for .SI domains

People don’t know if .SI is going to be the next big thing in tech. But the important factor is that it could. Combined with how affordable .SI domains are compared to .AI (less than 10% of the cost at the moment) it makes it an attractive proposition for domain speculators, who are looking to get great names to hold. We’ve already seen two domains sold for $50,000 in October, with more likely to happen soon.

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How AI and Super Intelligence Companies Can Use .SI Domains

How can AI and Super Intelligence companies make use of the .SI domain? Let’s go through the different approaches.

.SI domains for advanced AI startups

AI startups can use .SI domains to show that they are at the cutting edge of the technology – leaning on the traditional meaning of superintelligence. It is also a good domain if they cannot find the name they want in the already busy .AI namespace.

.SI domains for AI agents and autonomous systems

The growing field of AI agents and autonomous systems is exactly what Super Intelligence is aspiring towards. It is predicting they’ll develop from narrow artificial intelligence into ones that can operate above human capabilities. In other words, today’s AI with become tomorrow’s superintelligence.

.SI domains for robotics and deep-tech companies

Funnily enough, .SI already was a good fit for many robotics and serious tech companies, because SI already meant something to them. Silicon (Si on the periodic table) is used in every chip, sensor and solar cell. SI is the International system of units (meters, kilograms and amps) common to every scientific endeavor. It’s the acronym for spatial intelligence, another field of AI research with billions of dollars behind it.

In short, it’s a term that has usage in the tech field beyond just Super Intelligence, you just have to find the clients that could use it, and pitch it to them.

.SI domains for AI research organizations

For companies striving to push the frontier of AI models and research, .SI domains are an ideal new avenue for their ventures. As they work towards AI Super Intelligence, what better domain than the one that carries the name?

Why Domain Resellers Should Offer .SI Domains

Enough about the tech. Let’s talk about why domain resellers, and businesses that offer domains as part of their overall package, should sell .SI domains.

First-mover advantage for domain resellers

The tech world moves fast, and you can see that in the rapid uptake of .SI domains. But on the scale of the internet, it is still early days. And if a reseller can establish themselves as a trusted source of .SI, they could find themselves at the head of a lucrative market. Target existing AI companies, new start-ups and government contractors, who could benefit from the domain. Or look to upsell your existing .AI customers, by pointing out the relatively low cost and high potential of the matching artificial intelligence domain.

Expanding domain portfolios with emerging TLDs 

Most of the significant growth in domain registrations happens in new gTLDs, with DNIB Q2 showing 34% year-on-year growth for them. For a ccTLD to explode like this is unusual – the same period had 3.6% growth. And while it’s unreasonable to expect it to exhibit standard ccTLD high renewal rates, .AI is currently showing rates at around 90%. So, selling .SI domains will give resellers a product that can grow their revenue now, but could have the potential to transform into recurring revenue.

Generating new revenue opportunities with .SI domains

Demand for .SI domains is surging. It’s a highly speculative, but affordable, TLD that people are hoping to build tech businesses on top of. These will be businesses that need hosting, SSL, DNS and all the important internet infrastructure that makes businesses work.

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.AI and .SI Domains: Should Businesses Register Both?

One of the best things about the .SI domain is that it is a relatively inexpensive domain. That means you don’t need to worry too much about the difference between .AI and .SI, and which works best for you. If both names are available, a sharp business can just register both names. This is also useful as defensive registration: 22% of .SI domains already have a matching .AI, which can be read as positive. But it could also be hostile actors trying to either make money off selling the name of the future, or use it for phishing attacks. Tying down your matching name is a vital piece of your online domain management.

How CentralNic Reseller Helps Capitalize on .AI and .SI Domain Opportunities

Both .AI and .SI domains give technology companies in the artificial intelligence field a TLD that feels like it has been created exactly for what they want to do, even if it was a pair of happy little accidents. These are domains that signal to all customers that they are dealing in cutting-edge tech, and set them up for success. This is a growth market where any one business could be the next big thing. And identity, particularly online identity, is vital to make that happen. Which makes this an ideal market for domain resellers who are looking to either hold high-value names, or sell them to excited clients.

If that’s your goal, CentralNic Reseller is the platform for you. With more than 25 years of experience in the domain reselling business, offering 1900+ TLDs and SLDs, with the tools and automation support that help you turn growth into reliable revenue and actual profits, we are here to help resellers thrive.

Become a CentralNic Reseller and get access to .AI and .SI domains, alongside 1,900+ other extensions, and be part of the domain industry’s latest gold rush.

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FAQ

What is the future of .SI domains?

Nobody can say for certain, and you should be wary of anyone who claims they can. What we do know is that .SI went from around 198,000 domains to more than 450,000 in roughly a month after the US government adopted the term Super Intelligence. The real test comes from September 2027, when the first wave of one-year registrations comes up for renewal. If businesses are building on those names, .SI will settle in as a serious tech TLD. If it was mostly speculation, expect a drop.

What is the difference between AI and SI?

In practice, very little. Executive Order 14434 defines Super Intelligence as covering the same technologies as the existing US legal definition of artificial intelligence. In computer science, superintelligence means something more specific: a hypothetical AI that outperforms humans in almost every field. Today’s AI tools are nowhere near that, which is why only some companies have adopted the new term and others are sticking with AI.

Why should domain resellers pay attention to .SI domains?

Because demand moved faster than most of the market. New .SI registrations jumped from 3,515 in August 2026 to 46,066 in September, and daily registrations passed 20,000 at their peak. The buyers are tech founders, brand owners and domain investors, and every one of them needs somewhere to register. Resellers who add .SI now can capture that demand while it’s fresh, then sell the hosting, SSL and DNS that new ventures need.

Are .SI domains a good investment?

They can be, but treat .SI as a speculative asset. It could be a winner: OpenRouter.si and Staffing.si both sold for $50,000 in October 2026, and dozens of other .SI names have sold for four and five figures. But there is also risk, with many of the million-dollar asking prices you’ll see being just that: asking prices. The long-term value of a .SI portfolio depends on whether the Super Intelligence label sticks.

Which country uses the .SI domain extension? 

.SI is the country code top-level domain (ccTLD) for Slovenia, a Central European country of around 2.1 million people and an EU member since 2004. It’s run by Register.si, part of ARNES, the Slovenian academic and research network. Despite being a national domain, .SI has open registration, so individuals and businesses anywhere in the world can register one without a local presence.

Is .SI a good alternative to .AI?

For many businesses, yes. .AI is still the established choice and the extension most customers recognize, but it’s a crowded namespace with a two-year minimum registration that costs far more. .SI has more short, memorable names at a lower price, plus a direct link to the term the US government now uses.

How can domain resellers promote .SI domain extensions to customers?

Start with the customers most likely to care: AI startups, developers, deep-tech firms, and anyone who already owns a .AI domain. Suggest .SI as an alternative when a name is taken in .AI, or as a defensive registration to protect an existing brand. Bundle it with hosting, SSL and DNS for new ventures. And keep the message honest. .SI is a lower cost opportunity, not a guaranteed one.

Can I transfer my .SI domain to CentralNic Reseller?

Yes. To transfer a .SI domain, unlock it at your current registrar and request its authorization code (auth code). Then start the transfer through your CentralNic Reseller account or the API, using that code. .SI auth codes are time-limited, so start the transfer soon after you receive it. Moving a larger portfolio? Our domain migration support can help you transfer in bulk.