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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.
It is generally considered safe to use and there were no known widespread reports of trojans or malware associated with it over its lifetime. And looking on GitHub, I don't see any references to serious security issues of any kind in the current version.
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.