What rule engine frameworks work well with JSON data?
Today, JSON streams are all about realtime…. The heavy-weights for this would be the MuleSoft Anypoint Platform, including Mule runtime engine, for enterprise integration, and Microsoft BizTalk Integration platform, for real-time decision making and reporting; otherwise, you should probably be using the popular Drools BRMS. GitHub options include jools, node-rules, and nools. Be aware that realtime rule engines overlap with Inference engines and Reasoning systems.
For more detail, see my quick and dirty webpage: