NameIndex Analysis · June 2026
A 10x market awakening just occurred in the .si ccTLD — and nearly nobody noticed. In under a year, a .si domain went from selling at $2,195 (sentient.si, Sedo, May 2025) to commanding $20,000 (Recursive.si). That trajectory — $2K → $12.5K → $14.9K → $20K — is not a blip. It's a signal. The compression thesis explains why: AI → ASI → SI → I. As AI systems progress toward artificial general intelligence and then toward artificial superintelligence, the naming hierarchy compresses. SI = Super Intelligence. It is the natural top-level domain of the most consequential technological shift in human history.
| Domain | Price | Signal / Thesis | Date | Source |
|---|---|---|---|---|
| Recursive.si | $20,000 | Recursive — core AI/ML concept | Q2 2026 | Confirmed |
| Acquire.si | $14,888 | Corporate/investment intent signal | Q2 2026 | Confirmed |
| Self.si | $12,500 | Recursive self-reference, AGI-adjacent | Q1 2026 | Confirmed |
| Sentient.si | $2,195 | First measured benchmark transaction | May 2025 | Sedo |
| Copilot.si | — | Microsoft — strategic positioning, not resale | Pre-2025 | Public record |
The floor is $2,195 (May 2025). The ceiling is not yet established. Every comp sale has occurred within a 12-month window — this market is initializing in real time.
The numbers are not close. Active Domains: .ai: 551,000 vs. .si: 171,000 — 3.2x smaller, yet carrying a semantically superior signal.
DNJournal's 2026 YTD Top 100 ccTLD Chart: .si entries: zero. Conclusion: .si is invisible to the broader domain investment community — for now.
Registration cost: $11/year. The asymmetry is structural. .ai captured the first-mover advantage as "AI" went mainstream. .si now sits at a semantically superior position in the naming compression chain — one step closer to "I" (intelligence, identity, origin).
Microsoft bought copilot.si. Not for brand protection in Slovenia — for the signal. When the world's most aggressive technology company quietly acquires a domain that reads as "Super Intelligence" in a compressed linguistic context, that is not an accident. It is a leading indicator.
.ai arrived in 2017–2018 as "AI" went mainstream. The market woke up around 2022–2023 with the LLM boom. Premium .ai domains sold for six figures. .si is five years earlier in that cycle.
The data supports this:
The market is compressing around SI as the next semantic anchor. The question is not whether .si appreciates. The question is how early you position. Microsoft positioned early. You can too, for $11/year.
The .si secondary market is thin. Exit may require patience or direct buyer outreach. This is a feature, not a bug — it keeps most of the market on the sidelines.
ccTLD registry policies vary. Slovenia's ARNES registry may impose restrictions on transfers or ownership that differ from .com/.ai norms. Due diligence on transfer mechanics is required before any acquisition.
The compression thesis relies on the AI→ASI→SI progression being legible and broadly adopted. If the industry settles on different terminology, the semantic signal weakens.
DNJournal's absence of .si entries in 2026 YTD means the market is currently defined by a small number of informed buyers. This could shift slowly or quickly.
Net risk assessment: Moderate. The $11/year carry cost means the downside is bounded. The upside scenario has no visible ceiling given the asymmetric semantic positioning.
Smart money is not reading DNJournal's Top 100 to find .si entries — there are none, by definition. Smart money is reading the AI research roadmap, watching Microsoft's domain acquisitions, and doing the simple math on compression linguistics.