"Artificial intelligence" became AI. AI became agentic. The next rung is SI, superintelligence, and after that just i. NameIndex tracks the sales that prove each rung and holds the inventory for the next one.
First six-figure .si transaction, closed at Atom.com and reported by its CEO in November 2026. A separate $84,000 private sale was reported by Spaceship in October.
Life.si, the largest publicly disclosed .si sale, and the top domain sale worldwide on its day (Oct 30, 2026).
Staffing, OpenRouter, Gifts, Hollywood, Runtime, Fractal, Speech and more. The top end is deep, not one outlier.
About 600 names across .si, .ai and crossovers. Featured below; the full list is available on request.
NameIndex is run by Jeremy Krause. He bought AIAgent.co in 2022, before "agent" was the industry's word, and sold it for $50,000 in 2025. The .si book is the same trade one rung later.
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