10/25/2026
4:30 on a Friday in Kalispell. Opposing counsel just dropped 800 pages of discovery in a custody case, and the hearing is Tuesday.
(This firm is made up. The problem isn't.)
Denise has been the firm's paralegal for 19 years. She already knows how her weekend goes.
The attorneys know AI could get through that stack before dinner. They also know what happens if she pastes it into the ChatGPT or Claude account somebody at the firm already pays for. A mother's text messages, a father's bank records, a kid's counseling notes, all on a server in another state. On the personal plans, both companies train on those chats unless someone found the setting and turned it off.
Both sell business versions that don't. Most three-attorney firms aren't on one, and the ones that are still keep client files under someone else's roof, on someone else's terms.
ABA Formal Opinion 512 says a lawyer needs informed client consent before putting client information into a self-learning AI tool. That's a hard conversation to have with a mom in the middle of a custody fight.
Here's how we'd build it.
On-premises: we build the server, put it in the back office next to the copier, and the files never leave the building.
On CubCloud: a private model on our GPUs in Missoula, or on machines reserved for the firm alone. The files never leave Montana, and the people running the hardware are a couple hours down 93.
None of it trains on the firm's files. None of it shares them with anybody.
Then we drive up and spend an afternoon at Denise's desk, teaching her to run it on her own caseload.
Denise gets her Friday back. When a client asks where their file went, the answer fits in one breath: Montana, and no further.
Swap the law firm for a clinic, a CPA, a ranch, a county office, or a tribal program. Different files, same stakes, same answer.
Your roof or ours, and both are in Montana. That's Sovereign Sunday: one business a week, one reason private AI fits.
Sitting on data that can't leave the building? Come see our shop in Missoula, or we'll come to you.
Know someone who is? Send them to [email protected].