Big fan of signoz - otel, self-hosted, Prometheus based, works with grafana, scales. https://www.signoz.io https://www.signoz.io Datadog is good, sentry too,

Big fan of signoz - otel, self-hosted, Prometheus based, works with grafana, scales. https://www.signoz.io https://www.signoz.io Datadog is good, sentry too, but after running a cloud practice for a major world business, I prefer to have my sensitive system logs and traces in house.