I came to ask about this too... Keychat is Nostr-based and the best chat I've ever seen. Zero KYC. It literally can't be improved upon.

I do. It's the first app I tell new Nostr users to download because it makes every other Nostr PWA a better experience inside of it. In fact I'm running @Nostria inside it right now (a gorgeous experience if you've not tried it). The built in extension and wallets are better than the automatic app switching between 3rd party signers.

I think it's because they're not in the Opensats crowd 🙄 It's the closest thing to SimpleX (gold standard secure chats) that nostr has surfaced, and it came out early too.

I don't think they got a grant or VC-money, so they can only spread by word of mouth among the normie npubs. This is their website:

Keychat

Keychat - Super App for Humans and Agents.

Sovereign IDs, Bitcoin Wallet, Secure Chat, Mini Apps — all in Keychat.

I personally don't use KeyChat because when it first launched they came up with a large story about how they weren't going to allow you to use your current Nostr identity. It was weird. I didn't like it. Then they completely pivoted. I haven't tried the app since. The app is completely different now and obviously their original stance has changed. It's on me for not using the app, not them. For me it's out of sight, out of mind. I was turned off in the beginning and never looked back. I should revisit the app when time permits.