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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.
https://github.com/exp0se/harbinger - although it appears that the project was abandoned a few years ago, so maybe not “the best” solution
https://github.com/intelowlproject/IntelOwl And MISP - however they both require a little bit of setup and such.
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.