Since when is security-threat detection a "mainstream business user" issue?
I'm not connecting security-threat detection or, indeed, most streaming-data analysis applications with "mainstream business users." At the very least, I would think we're talking about having security analysts or business analysts working alongside IT to tap into streaming sources.
Once IT is involved, I'm guessing the likes of Splunk or Sumo Logic would give Red Lambda a run for its money on supporting such analyses without having to turn to data scientists. Amazon Web Services Kinesis also seems to offer a comparatively easy stream-analysis environment, but, here too, I would doubt it would be something for "mainstream business users."