General AI assistants lack depth for specialized fields. Lawyers need case law references, doctors need medical coding, engineers need CAD specs.
A white-label Claude wrapper that prepackages domain knowledge and connects to professional tools via API. Charge per-seat to firms wanting smarter assistants.
Start with one vertical where you have expertise, like legal research or medical transcription helpers. Focus on accuracy over breadth.
The risk is large players like Microsoft adding vertical-specific Copilots before you gain traction.