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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.
Not a direct solution to your problem but in the meantime you could try rssguard. It's in the community repository and it's actively maintained, contrary to QuiteRSS (last commit was on December 19th, 2021).
NOTE:
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Hence, a higher number means a more popular project.