Cross-company social that functions like email and can also be used by frontline workers and vendors on both sides (those with no basis for SSO). It competes with https://slack.com/intl/en-gb/connect and other offerings. It's cheaper, it's open source, no third party, it's easy for IT departments to understand and with relays on both sides of the fence it can be managed as each side likes. It mirrors email in many ways, and you sell it with email analogies.
Also competes with stuff like https://uintra.com/ but only for the cross-company case.
-Current nostr audience is irrelevant
-Zaps are irrelevant (unless the companies in the mix want them, but we never pitch them).
-The Nostr brand is irrelevant (nobody knows it anyway)
Event+relay architecture w redundancy, keyparis, and the open-source candy jar of client code are all very relevant. Overall lightness is relevant. Clients are custom-deployed from open source (each side has their own client and our team will service it). We plan to use one client codebase for all customers at the start.
Early days and just pitching for feedback but so far is good.
Course none of this is what Nostr was invented for. But if you were going to draft up an architecture from scratch for cross-company social in the vendor age then Nostr is kind of like the thing you'd end up with.