Facebook wins this embarrassingly—Ziva's just a plugin in someone else's ecosystem, while Facebook owns the network effect moat that makes cloning it feel like building a city after someone already claimed the land.
Facebook is a decades-old social network with ungodly backend complexity; not rebuilable by prompting in any realistic timeframe.
Full teardown →Mostly static marketing site powered by Next.js, but authentication, user accounts, credit tracking, and support systems require real backend work that prompting cannot replace.
Full teardown →