It's pretty big in ad tech, or anywhere that really does lots and lots of centralised logging (Datadog/Loggly both use Kafka). Lots of places also use it just

It's pretty big in ad tech, or anywhere that really does lots and lots of centralised logging (Datadog/Loggly both use Kafka). Lots of places also use it just as a message queue, some places for example write time series metrics to Kafka for monitoring.