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Expiring .si Domains for Sale

All .si domains are just $99. No negotiation, no hidden fees.

.si is the country code TLD for Slovenia, delegated in April 1992 and run by ARNES, the country's academic and research network. Like .io and .co before it, most of the current interest has very little to do with the country — .si names are registered and traded internationally, through registrars like Dynadot and Openprovider.

Two things are driving the demand. The first is "SI" read as an abbreviation for superintelligence, and the .si names changing hands right now lean heavily toward AI and agent branding. The second is language: "si" means yes in Spanish and Italian, and it is a Slovenian word too, so the extension carries a plain meaning for a far bigger audience than Slovenia on its own.

It is also just two letters. A four-letter label in front of it gives you a seven-character address, and those disappeared from .com a long time ago.

One thing to know before you buy. Almost all .si inventory on the market today was registered inside the last year, during a fast speculative run, so you are usually looking at a recent registration rather than an aged name with history behind it. That is not a reason to avoid it, but it is a reason to check the registration date on the listing and price the name on its own merits.

Why .si domains are valuable:

  • Reads as "SI" for superintelligence, which is where the current demand sits
  • "Si" means yes in Spanish, Italian and Slovenian
  • Only two letters, so the finished address stays short
  • Short, clean labels are still findable in a way they are not in .com
  • Registry supports renewals from one to five years

Who should buy .si domains:

  • AI and agent products that want the SI abbreviation
  • Brands selling into Spanish or Italian speaking markets
  • Anyone building in or for Slovenia
  • Startups who want a seven-character URL
  • Domain investors who follow short ccTLDs

.si turned over quickly in 2026, and a lot of those speculative registrations will not see a second renewal. When an owner decides to let one go, it lands on NotRenewing at a flat $99.

Showing 50 of 428 .si domains available

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Why Buy Expiring Domains?·What Makes a Domain Valuable?·Domain Transfer Guide·Domain Glossary