Circonus (https://www.circonus.com/ https://www.circonus.com/) supports both recording histogram directly, and merging histograms for analysis. IIUC, it also su

Circonus (https://www.circonus.com/ https://www.circonus.com/) supports both recording histogram directly, and merging histograms for analysis. IIUC, it also supports first-class timeseries data similarly to Monarch, where each data point has a high precision timestamp that does not have to align with other timeseries in the data set.