Four characters, coined
Short names are a finite resource and nobody is making more of them. nex3 describes no product, so it competes with no generic wording and can carry a trademark of its own.
nex3.si For sale
Nex is next · Three is the generation
The name for the superintelligent generation — systems that reason, act and outgrow the instructions they were given.
- Extension
- .si · ARNES registry
- Held at
- Domenca
- Transfer
- Authorisation key
- Broker
- None — owner direct
Instructed. Prompted. Superintelligent.
Nex is the root of next and of nexus: what comes after, and the point where everything connects. The 3 says which turn you are naming.
1
Instructed
Software did exactly what it was told. Every behaviour written by hand.
2
Prompted
Models answered in language, but a person still stood at the keyboard for every step.
3
Superintelligent
Systems that reason, decide and act past the instructions. This is the generation the name points at.
Why the name holds
A generation, not a date
A 3 reads the way a version number reads: the third turn. It positions a company without naming a year, a model size or a technique that will age.
Jurisdiction in the address
.si is an EU extension in the registry run by ARNES. For anyone building under the AI Act, or selling European data residency, the address says it before the pitch does.
Survives the phone and the logo
One syllable and a digit, so it dictates cleanly in any accent. Four letters in a wordmark, a short address like info@nex3.si, an app icon that needs no abbreviation.
Where it lands
- Frontier labs nex3 Labs, nex3 Research. Short and coined reads as an institution, not a feature.
- Agent platforms Short enough to live inside a command, an SDK namespace and a status page.
- Inference & compute Infrastructure earns trust by being plain, short and impossible to mistype.
- Alignment & evaluation When the product judges someone else's model, a neutral name carries more authority.
- European AI Sovereignty is the pitch, and the extension states it in the address bar.
Three steps, no broker
Your offer
Write with your number, who you are and what you would build on the name. Answer within two working days.
Contract and escrow
We sign a purchase agreement and the money sits with a notary or an escrow service until the domain is in your name.
Transfer
The domain is held at Domenca. We issue the authorisation key, you move it to your own registrar, and escrow releases the funds once the registry confirms.
Before you write
There is no price here. What do I offer?
Your own number. The name is sold by offer, so send what it is worth to you in EUR, with who you are and what it is for. Every serious offer gets an answer.
What exactly is included?
The domain nex3.si and its transfer to your registrar. A website, logo or social handles are not part of it. If you want them, say so in your offer and we agree separately.
Can a company outside Slovenia own a .si domain?
Yes. The .si registry has no residency requirement, so any natural or legal person can be the holder. Your own registrar will confirm the current conditions.
How is payment secured, and how long does it take?
Through escrow: the buyer pays a notary or an escrow service, the domain moves, and only then are the funds released. Once the contract is signed, the transfer itself is usually a few working days.
The name goes to whoever moves first
Send your number and what you plan to build on it. If the fit is right, the rest is a contract and an authorisation key.
Offers answered within two working days