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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.
They recommend Bitwarden on their addons page. I can vouch for it being a good choice. Open source, zero knowledge, end-to-end encryption, had a security audit, free with most features, paid for stuff like two factor.
Teams for Linux client (beta) just popped up in the Fedora software center. Haven't used it so I can't vouch for it being feature complete. Also available as a flatpak.
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.