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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Their software is open source. There is certainly the possibility that they are logging what sites you are visiting, but as I understand it they have shown in court multiple times that it is not the case. This does certainly shake my trust in them though. Recommended alternative that doesn't log and supports a gigabit connection?
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.