Fanout vs Gun: What are the differences?
Fanout: Realtime APIs made simple. Fanout makes it easy to build realtime APIs and apps. The product is a cross between a reverse proxy and a message broker. Receivers subscribe to channels, and published data is delivered in realtime; Gun: Self-hosted Firebase. GUN is a realtime, decentralized, embedded, graph database engine.
Fanout and Gun can be categorized as "Realtime Backend / API" tools.
Gun is an open source tool with 10.3K GitHub stars and 640 GitHub forks. Here's a link to Gun's open source repository on GitHub.