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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.
Signal: long touted by Snowden as the gold standard and indeed have had very little issues using it on GrapheneOS. The only bug I have found is if you attempt to take a picture in the app in landscape view, it doesn't scale the picture correctly and Signal will not help resolve issues that occur on GrapheneOS cause "they do not officially support it".
Element/Riot.im - The notification badges issue occurred sometimes where it indicated there were unread messages when there were none, but they only occurred on a friend's Huawei so not sure if that was an element issue or a Huawei issue. But I will note that unlike Signal and Wire which is always polling their respective servers for new messages, Element instead polls every 5-10 seconds (customizable) for new messages. It did not always auto-start on boot and I had to manually start it myself. One further thing to note is element stores all messages in the cloud but it is also end-to-end encrypted.