-
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.
Laravel Echo is free and part of Laravel. You need to use it with a websockets server or a service like Pusher or Ably, and that is what you pay for. But if you make your own websockets server with Laravel Websockets, as u/phoogkamer suggested, you can host your own websockets server on your infrastructure.
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.