Where the CLI's usage data goes, and an opt-in ping for servers
The CLI now sends its anonymous usage events to Vercel Web Analytics on the Zitadel cloud, preview.zitadel.com, with at most eight of their properties, and sends nothing to Mixpanel for now. The events carry surface: cli, which names the Zitadel component that sent them. The existing opt-outs, --no-telemetry, DO_NOT_TRACK=1 and ZITADEL_TELEMETRY=0, turn them off, and runs in CI send nothing.
A server reports only if you turn it on: with service_ping.enabled (NEXTGEN_SERVICE_PING_ENABLED=true), it reports its version, whether it runs self-hosted or locally, its database dialect, operating system and CPU architecture to Vercel Web Analytics when it starts and once a day after. It never sends its address.