.si and the “Super Intelligence” Gold Rush: What Marketers Should Actually Know

The key takeaway: On September 29, 2026, a U.S. executive order rebranded "artificial intelligence" as "Super Intelligence" (SI) — the same two letters as Slovenia's country-code domain, .si. The result was a speculative stampede: the registry's own daily chart shows total .si domains jumping from 190,719 at the end of August 2026 to 440,414 by October 21 ^[1]. Domains that cost about $11 a year to register are now being flipped for four and five figures on the secondary market, though individual sale claims are mostly unverifiable forum and social-media posts ^[2]. A .si name can make sense as a cheap defensive registration or a clever AI-flavored hack, but it is a Slovenian ccTLD, not a new gTLD — with geo-targeting in search, changeable registry rules, and an acronym whose fashion depends on one country's politics.

Background: what .si actually is

.si has been Slovenia's country-code top-level domain since April 1, 1992, and it is run by the Academic and Research Network of Slovenia (ARNES), a public institute in Ljubljana that operates the registry under the Register.si brand ^[3][4]. Despite being a national domain, it has no local-presence requirement: the registry's general terms define a holder simply as any legal or natural person, and by the end of 2025 roughly a quarter of all .si holders were outside Slovenia (holders in Slovenia: 76.4%; Germany 4.9%; the U.S. 3.2%) ^[5][6].

The mechanics are simple and, by industry standards, very cheap:

• Second-level names only (yourname.si), 2–63 characters, with support for accented characters (č, š, ž) and other Latin scripts ^[7][8].
• Flat wholesale pricing: the registry charges registrars €10 per year for a registration or renewal, a fee it held at €8 from 2015 before returning to €10 in January 2023 ^[9][10]. Retail prices are close to wholesale — Spaceship launched .si in October 2026 at $10.98 for registrations and $11.98 for renewals ^[11].
• A short reserved list (si.si, rs.si, 112.si, 113.si and a few others) ^[8], a 16-day refund window, renewals of up to 5 years, and a 30-day quarantine before deletion ^[7].
• Disputes go through the registry's ADR procedure (ARDS): a complaint over one to five domains costs €700 including VAT, and decisions are published — in 2026, names like temu.si and khadi.si were transferred on company-name and trademark claims ^[12][13].

For scale: .si ended 2024 with 162,648 domains and 2025 with 172,227 (+6%; 29,410 new registrations), holding about 49% of Slovenia's domain market ^[6][14]. The 2026 boom is something else entirely.

The trend: a political rebrand becomes a domain story

In a UN General Assembly speech in late September 2026, President Trump said "artificial intelligence" made the technology "sound fake" and that he wanted "superintelligence" — SI — used worldwide ^[15]. On September 29 he signed an executive order directing U.S. agencies to use "Super Intelligence" and "SI" instead of "AI" and to stop acknowledging the old terms ^[16].

Because .si is Slovenia's country code, speculators treated this as a product launch. The numbers, from the registry's own newly published daily statistics page ^[1] and press reporting:

• 9,780 new registrations in the first 24 hours after the order, versus 3,515 in the entire preceding month; a year earlier the zone was growing by roughly 110 domains a day ^[17].
• About 44,000 registrations in September versus fewer than 2,000 in August, with 11,000 on a single day, according to figures the registry gave reporters ^[18]; dpa reported the total passed 200,000 domains by September 30 ^[15].
• Registry data show the surge continuing and accelerating: 247,789 domains at the end of September, 440,414 by October 21 — more than doubling the zone in seven weeks ^[1].

Reported baselines differ: Computerworld cites 3,515 registrations in the month before the order ^[17], Tech Digest "fewer than 2,000 in August" ^[18], and the registry's month-end totals show net growth of about 2,100 domains in August (188,653 to 190,719) ^[1]. Net totals hide deletions, so these figures measure slightly different things; the order of magnitude of the jump is what they agree on.

The registry (about 12 employees, according to a 2022 registry notice ^[10]) says services ran smoothly, began publishing daily statistics, pointed to the AI-naming debate as one driver, rejected media speculation that it stood to make millions (its €10 fee is fixed), and advised brand owners without a .si name to register promptly ^[1][15].

The aftermarket: real money, mostly unproven

Direct evidence of end-user adoption is thin so far. AI-flavored .si names were quietly taken years before the hype — RDAP records show ai.si registered in 2019, gpt.si in December 2022, llm.si and superintelligence.si in 2023, agi.si in 2024 ^[19] — but many are parked, redirected to personal projects, or listed for sale: chat.si serves a "for sale" lander from NamePros, and neural.si is priced at $999,895 on the .si-focused sales platform name.si ^[20][21].

What buying exists looks speculative. Straight Arrow News documented flippers active on X since early June 2026, one claiming a $9 registration (build.si) sold for $15,000 and "$30,000 in .si sales today" on September 29; it also covered a viral thread arguing that a July spike (over 7,000 registrations versus ~55/day previously) implied insider foreknowledge ^[2]. There is no confirmed evidence for that theory, and the registry's own month-end totals do not show a July jump: the zone grew by about 1,300 domains net that month (187,360 to 188,653), less than in May or June ^[1]. Commentator Elliot Silver's take after Namecheap/Spaceship onboarded .si: "even more speculative" than .ai, with "some .SI sale reports" but "not a whole lot of usage by end user companies" ^[11].

What .ai and .io teach about two-letter bets

.ai (Anguilla) shows the upside of a lucky ccTLD: the suffix passed one million registrations in January 2026, and registration fees brought Anguilla (population under 14,400) US$80 million in the first seven months of 2026 — 47.5% of all government revenue — under a five-year commercial agreement with Identity Digital signed in October 2024 ^[22]. But note who profits: the registry, via volume. In Slovenia the state registry's flat €10 fee means the windfall accrues to squatters and landers, not the country ^[2][9]. Retail pricing also diverges — around $10 for .si versus roughly $90 for .ai ^[17].

.io (British Indian Ocean Territory) shows the structural risk. When the UK agreed to cede the Chagos Islands to Mauritius, commentators and ICANN itself had to discuss what happens to a ccTLD if its ISO 3166 country code disappears; brokers cite the Brexit precedent, when UK registrants were forced to give up .eu domains ^[23][24]. Slovenia's sovereignty is not in question, but the lesson stands: ccTLDs are governed by a country's policy choices, which can change.

The risks specific to .si

1. SEO geo-targeting. Google documents that ccTLDs are a strong country signal and maintains a list of ccTLDs it treats as generic — .ai and .io are on it; .si is not. A .si site is by default associated with Slovenia in search; reaching a global audience then depends on your content, language and hreflang signals rather than on the domain ^[25].
2. Acronym risk. "SI" as a tech term is a policy artifact of one administration; industry discussion already flags the risk that usage — and resale value — fades if the terminology does ^[11].
3. Trademark risk. ARDS decisions show brands routinely recover .si names that conflict with trademarks or company names — cheap to register is not cheap to keep if a rights holder files a €700 complaint ^[12][13].
4. Registry policy. The registry deactivates domains with inaccurate holder data, updates its terms periodically, and offers a paid registry lock — a ccTLD is a regulated space, not a decentralized asset ^[6][9].
5. Brand confusion. To most of the world, .si still reads as Slovenia (or Sports Illustrated). That may not matter for a domain hack; it matters a lot for a corporate primary domain.

A practical checklist before you buy

• Register at retail prices first. Available .si names cost ~$11/year at major registrars; only pay aftermarket prices when the name is genuinely taken ^[9][11].
• Check status and history via the registry's RDAP service (rdap.register.si): registration date, expiry and status are public ^[19].
• Search trademarks in your category before buying; assume a conflicting mark can be lost through ARDS ^[12][13].
• Decide whether it's defensive or primary. Defensive registrations for a brand you already own are cheap insurance — even the registry suggests them ^[15]. A primary .si domain needs a plan for the Slovenia association in search and in users' minds ^[25].
• Treat resale claims skeptically. Multi-million-dollar asking prices are marketing; verified, closed .si sales are scarce, and platforms like name.si list the operator's own portfolio at self-set prices ^[11][21].
• Budget for policy risk. Renew for multiple years if the name matters, keep registrant data accurate, and remember ccTLD rules — including pricing — can change ^[23][24].

Sources

1. Register.si — "Follow the Growth of .si Domains" (daily-updated statistics): https://www.register.si/en/news/follow-the-growth-of-si-domains/
2. Straight Arrow News — "Who's making money on the government's new name for AI?": https://san.com/cc/whos-making-money-on-the-governments-new-name-for-ai/
3. IANA root zone database — .si (manager: ARNES): https://www.iana.org/domains/root/db/si.html
4. Wikipedia — .si (introduced 1 April 1992; no restrictions): https://en.wikipedia.org/wiki/.si
5. Register.si — General Terms (holder = legal or natural person): https://www.register.si/splosni-pogoji/
6. Register.si — Annual Report 2025 (172,227 domains; holder countries; 49% market share): https://www.register.si/porocila/letno-porocilo-2025/
7. Register.si — registration/renewal rules (homepage guidance): https://www.register.si/
8. Register.si — reserved names / allowed characters: https://www.register.si/en/reserved-domain-names/ ; https://www.register.si/en/allowed-characters/
9. Register.si — registry price list (€10/year): https://www.register.si/cenik-za-registrarje/
10. Register.si — 2022 price-change notice (price history; 12 employees): https://www.register.si/obvestila/zvisanje-cene-za-registracijo-in-podaljsanje-si-domen/
11. DomainInvesting.com — ".SI Domain Names Now on Namecheap" (Spaceship pricing; Silver's assessment): https://domaininvesting.com/si-domain-names-now-on-namecheap/
12. Register.si — ARDS fees (€700 for 1–5 domains): https://www.register.si/en/domain-disputes-fees/
13. Register.si — ADR decisions (2026 transfers incl. temu.si, khadi.si): https://www.register.si/en/domain-disputes/
14. Register.si — Annual Report 2024 (162,648 domains): https://www.register.si/porocila/letno-porocilo-2024/
15. dpa via Yahoo — "Slovenia's .si domains boom after Trump calls AI 'superintelligence'": https://www.yahoo.com/news/world/articles/slovenias-si-domains-boom-trump-083338436.html
16. White House — Fact Sheet, "President Donald J. Trump Inaugurates the Era of Super Intelligence" (Sept 29, 2026): https://www.whitehouse.gov/fact-sheets/2026/09/fact-sheet-president-donald-j-trump-inaugurates-the-era-of-super-intelligence/
17. Computerworld — "Trump's Super Intelligence edict supercharges .si domain registrations": https://www.computerworld.com/article/4230104/trumps-super-intelligence-edict-supercharges-si-domain-registrations.html
18. Tech Digest — "Trump's suggested AI rebrand sparks surge in Slovenian web domains": https://www.techdigest.tv/2026/10/trumps-suggested-ai-rebrand-sparks-surge-in-slovenian-web-domains.html
19. Register.si RDAP — per-domain records (e.g. https://rdap.register.si/domain/ai.si): https://rdap.register.si/
20. chat.si — NamePros "for sale" lander: https://chat.si/
21. name.si — .si aftermarket platform; neural.si listing ($999,895): https://name.si/ , https://neural.si/
22. Jamaica Gleaner — "Anguilla's AI domain registration earns US$80m year-to-date": https://jamaica-gleaner.com/article/business/20261009/anguillas-ai-domain-registration-earns-us80m-year-date-more-all-taxes
23. Reuters — "UK set to sign deal ceding sovereignty of Chagos Islands to Mauritius" (May 22, 2025): https://www.reuters.com/world/uk/uk-set-sign-deal-ceding-sovereignty-chagos-islands-mauritius-2025-05-22/
24. DomainInvesting.com — "How Advisors Address .IO Risks with Clients" (ICANN discussion; .eu Brexit precedent): https://domaininvesting.com/how-advisors-address-io-risks-with-clients/
25. Google Search Central — ccTLD geo-targeting and the generic-ccTLD list: https://developers.google.com/search/docs/specialty/international/managing-multi-regional-sites