From my casual browsing, I think that aside from a prettier UI it does a subset of what Monit can do at the moment and Service Canary seems to be based more aro

From my casual browsing, I think that aside from a prettier UI it does a subset of what Monit can do at the moment and Service Canary seems to be based more around network changes than system-local changes. The messaging of Service Canary is not as comprehensive of a monitoring solution as Monit and implies that this kind of monitoring needs a distinct solution although Monit can probably do all of these things (file change detection, network event notification, etc.). Most monitoring systems are based around threshold ranges of measured values. Service Canary, like Monit, seems to be more oriented around event-based monitoring closer to what is done in logging infrastructures similar to an ELK (Elasticsearch, Logstash, Kibana) or Sumologic based stack that will aggregate event / log data and derive numerical values that you can then alert upon. Monit is able to at least react to an event with a response, I don't really see much about event reactions for Service Canary.