Yes, we're using it in production. However, we have deployed our own stack of it. You don't have to use their service if you don't eant to. It's open source, so

Yes, we're using it in production. However, we have deployed our own stack of it. You don't have to use their service if you don't eant to. It's open source, so in a way there is a free tier to it if you can put some work into deployment.