GUN

Stats

11K+ github stars 3M ~ 30M downloads monthly

Creating customizable interfaces: See Party which reuses any existing website (gmail, twitter, Facebook, reddit, etc.) for E2EE messages.
Communities setting norms: See my article on emotionally intelligent social networks, also check out the wild Notabug experiment.
Keeping public conversation from fragmenting: Check out "How to fix the internet" by Martti Malmi (Satoshi's 1st Bitcoin contributor) which is exactly this.

Decentralized/p2p.

Uses data replication via message passing.

It daisy-chains, routes, & relays messages.

Think of it as doing also what the internet, routers, switches, etc. already does.

But also works over most existing transports: WebRTC, UDP multicast, TCP/HTTP -> Websocket, etc.

Iris adds a reputation system to SEA which provides the underlying cryptographic Security, Encryption, & Authorization.

The most important differentiating factor is that we support multi-device login that is cryptographically secure yet uses "normal" UX.

This technique can be extended to secure password resets (no servers)

And, password recovery using a 3-Friend-Authorization approach that we cutely call 3FA (please don't use this with your Bitcoins).

Business models (Open Source, donation, enterprise, + decentralized PaaS, dBaaS, SaaS, Marketplace)
Payment (AXE bandwidth credits)

Iris and NAB (see above link).