Since the theme of this thread seems to be non-clojure alternatives, I'll point in the direction of InfluxData (formerly InfluxDB)'s new-ish Kapacitor project.

Since the theme of this thread seems to be non-clojure alternatives, I'll point in the direction of InfluxData (formerly InfluxDB)'s new-ish Kapacitor project. While I'm unconvinced their custom JavaScripty DSL (TICKscript) is actually preferable to Clojure or even can be read without careful, quite LISP-like indentation, it is pretty similar in basic functionality to Riemann and is definitely not-Clojure* see: https://influxdata.com/blog/announcing-kapacitor-an-open-source-streaming-and-batch-time-series-processor/ https://influxdata.com/blog/announcing-kapacitor-an-open-sou... https://docs.influxdata.com/kapacitor/v0.2/tick/ https://docs.influxdata.com/kapacitor/v0.2/tick/ https://github.com/influxdata/kapacitor https://github.com/influxdata/kapacitor *at worst, it's a mangled subset of clojure with extraneous dots and the parentheses in the wrong places :-)