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addon-cloudflared
Connect remotely to your Home Assistant instance without opening any ports using Cloudflared.
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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.
Personally, I use and recommend the Cloudflared add-on. Super easy to setup if you have your own domain, and it creates a secure tunnel that can be accessed like any other website. So you are then free to setup other integrations that require public access (like Google Home, etc.).
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.