For anyone interested in push-to-talk/intercoms we built a free tool at the beginning of quarantine last year called Squawk - https://www.squawk.to
No affiliation, just a customer/user.
As someone else pointed out, migration without CI can be dangerous and difficult to coordinate with deployment.
How does QuestDB differ from other timeseries/OLAP offerings? I'm not entirely clear.
When something is free it usually is paid for by selling my data, as the free-tier of a paid product, or the owners haven't figured out how to make money on it and are hoping to figure that out later.
Most of the traffic is P2P. We operate a couple of geo distributed relays for NAT'd traffic. But everything is 100% e2e encrypted thanks to webrtc.
It's mostly a tool for us and something that helps sell our other products, but we decided to split it out as a separate app so that it could be used independently. All we collect is a name and email, and even those can be pseudonymous.