-
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.
It should be ok as they even mention using it for exposing services like RDP and I've seen some people using it for game servers, but you might want to get a paid plan since your endpoint changes every time you fire up ngrok and it's annoying. You can also check the open source alternative if you feel like it won't be a problem for you.
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.