.si vs .ai domains: cost, availability and meaning

buydotsi editorial (PROJECT82 LLC) · Published · Updated

A .si domain cost $11.99 to $25.00 for the first year on one-year terms, while a .ai cost $85.60 to $99.99 a year and must be registered or renewed for at least two years, at the registrars we checked on 3 October 2026. (Hostinger .si, NameSilo, Dynadot .ai, nic.ai, as of 3 Oct 2026) .ai is Anguilla's country code and has long been read as "artificial intelligence"; .si is Slovenia's country code and picked up a second reading, "super intelligence", after a US executive order on 29 September 2026 (White House fact sheet, read 3 Oct 2026).

Side by side

.si .ai Source, as of
Country Slovenia Anguilla Register.si, Dynadot .ai, as of 3 Oct 2026
Minimum term 1 year 2 years (registration and renewal) Register.si 5.1.1, Dynadot .ai, 3 Oct 2026
First-year price Hostinger $11.99; Dynadot $12.04; NameSilo $25.00 Dynadot $85.60; Hostinger $89.99; NameSilo $99.99 Hostinger .si, Hostinger .ai, Dynadot .si, Dynadot .ai, NameSilo, 3 Oct 2026
Renewal, per year Dynadot $13.50; Hostinger $16.99; NameSilo $25.00 Dynadot $85.60; NameSilo $99.99; Hostinger $109.99 Hostinger .si, Hostinger .ai, Dynadot .si, Dynadot .ai, NameSilo, 3 Oct 2026
Smallest purchase at Dynadot $12.04 (1 year) $171.20 (2 years) Dynadot .si, Dynadot .ai, 3 Oct 2026
Domains registered 261,320 (3 Oct 2026) 598,007 (2 Jan 2025, the latest figure on nic.ai) Register.si, nic.ai FAQ, as of 3 Oct 2026
New registrations 46,066 in September 2026 not published by the registry Register.si growth charts, as of 3 Oct 2026
Privacy No privacy add-on (not allowed at Dynadot); a private individual's public record shows only an email address Privacy and proxy services permitted Dynadot .si, Register.si general terms 13.3, nic.ai FAQ, as of 3 Oct 2026
Disputes ARDS, the registry's own procedure UDRP Register.si general terms 18, nic.ai FAQ, as of 3 Oct 2026
Accented letters (IDN) Allowed, e.g. č, š, ž Not supported at Dynadot Register.si allowed characters, Dynadot .ai, as of 3 Oct 2026
Reported sales, 21 Sep to 1 Oct 2026 61 sales of $100+, $137,057 total 127 sales of $100+, $185,794 total Our sums of NameBio daily reports: daily table with a link to each NameBio report, as of 3 Oct 2026

The two totals are from different dates; nic.ai has not published a newer .ai count on its FAQ.

Disclosure: NameSilo links carry our affiliate ID; Hostinger links earn us nothing.

Related: .si vs .ai over 3 years · .si prices · .si registration statistics · AI and SI startup names on .si

FAQ

Is a .si domain cheaper than a .ai domain? Yes. On 3 October 2026 the smallest .si purchase at Dynadot was $12.04 for one year, while the smallest .ai purchase was $171.20 for the required two years. (Dynadot .si, Dynadot .ai, as of 3 Oct 2026)

Why must a .ai be registered for two years? Registrars state that .ai requires a minimum term of two years for both registration and renewal. (Dynadot .ai, Hostinger .ai, as of 3 Oct 2026)

Does .si stand for super intelligence? Officially .si is Slovenia's country code. On 29 September 2026 a US executive order told federal agencies to use "Super Intelligence" and "SI" instead of "AI", which gave the letters a second reading. (White House fact sheet)

Which extension has more names registered? .ai had 598,007 names on 2 January 2025, the latest figure on its registry's site, and .si had 261,320 on 3 October 2026. (nic.ai FAQ, Register.si, as of 3 Oct 2026)

Can I hide my details on a .si like on a .ai? .ai permits privacy and proxy services, while Dynadot lists privacy as not allowed for .si; for a private individual, though, the .si registry publishes only the contact email address. (nic.ai FAQ, Dynadot .si, Register.si general terms 13.3, as of 3 Oct 2026)

Sources

More from buydotsi