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.si is the country-code domain of Slovenia, run by the registry Register.si, and anyone in the world can register one through an accredited registrar. Lately .si is also read as short for “superintelligence”, which has put short .si names in the AI news. These posts cover that story, along with plain-language guides to registering and buying a .si domain.
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How to Buy a .si Domain in 2026: Price, Rules & Cheapest Registrars
Everything you need to register or buy a .si domain: the official rules from Register.si, a step-by-step guide, and a price comparison of registrars we checked ourselves, renewal costs included.
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Elon Musk says "No more AI. SI." Here's what it means for .si domains
Elon Musk says "SI" (superintelligence) is better than "AI". What he posted, the SpaceXSI reply, and why .si domains could become the next .ai.
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Did Insiders Cash In on .si Domains Before Trump’s “Super Intelligence” Order? We Checked the Data
I was building BuySiDomain when Trump's "Super Intelligence" posts hit. Overnight, .si went from a quiet Slovenian extension to the most-watched domain on my screen. When Cochran's thread went viral, I wanted to know one thing: how much of it does the data actually back up?
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SI Now Means Super Intelligence. Here's What That Means for .si Domains
For 30 years, ".si" on the web meant one thing: Slovenia. As of September 2026, those two letters have a second meaning. This post covers what happened, why .si domains are suddenly in demand, what they cost, and the risks to weigh before you buy one.
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.si Domain News 2026: Why the .si Domain Is Booming
Why "Super Intelligence" made the .si domain famous overnight, what's confirmed and what isn't, and whether .si could become the next .ai.