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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.
Option 2 is to sign up for an instance of Funkwhale and upload your tunes to your private library there. You can get an app like Otter for your phone from F-Droid. Explore the different instances of Funkwhale as they have different quotas, typically 1 GB to 30 GB. It just depends on how much music you have and the format (lossy vs lossless).
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.