The Swiss constraint has one enormous engineering consequence, and it is worth stating before the sector detail, because it decides most designs here.
In-country cloud capacity exists: at the time of writing there are hyperscale regions in Zurich from Google and Microsoft, while the largest provider by market share has no Swiss region at all, which quietly forces a platform decision on organisations that had assumed they had already made one. But regional capacity is not the same as model availability. The hosted frontier models are generally not offered from Swiss regions, so a project that must keep client identifying data inside Switzerland frequently cannot use them — not because of a policy objection, but because there is nowhere to send the request. The answer is usually a self-hosted open-weight model running on infrastructure the institution controls, which is a real trade: current open-weight models are behind the best hosted ones on the hardest reasoning tasks, and ahead on every question about where the data went. We would rather measure that gap on your documents than debate it in the abstract. The options are set out under on-premise AI and open-weight models.
Private banking and wealth management supply the majority of the document work: client files, onboarding and due diligence packs, suitability assessments, correspondence in three or four languages. The valuable system reads the file, assembles the evidence, cites where each fact came from and leaves the judgement with the relationship manager. It never leaves the bank.
Insurance and reinsurance bring claims and treaty documents at volume, with the same secrecy pressure in a milder form and a much greater tolerance for volume-driven automation.
Pharmaceutical and life sciences groups along the Zurich axis bring regulatory and research documentation, where traceability to source matters more than fluency; that work is described under life sciences research.
Commodities and trading firms, many of them a short train ride away in Zug, bring contract and shipping documentation with a strong preference for keeping everything in one jurisdiction, which usually resolves the same way as the banking work. The regulated decisioning patterns behind all of it are under financial services.