Fanout vs Horizon: What are the differences?
What is 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.
Fanout and Horizon can be primarily classified as "Realtime Backend / API" tools.
Horizon is an open source tool with 6.77K GitHub stars and 389 GitHub forks. Here's a link to Horizon's open source repository on GitHub.