Promscale is an observability backend powered by SQL that enables developers to query their traces and metrics in a unified and complete SQL interface. With Promscale, users can leverage the power of SQL to analyze their observability data, including OpenTelemetry traces, Prometheus metrics, logs, and other future data types. The platform provides broad support for observability standards, operational simplicity, and familiar experience with PostgreSQL as its foundation. It also offers unparalleled insights through TimescaleDB's advanced time-series analytical functions and Postgres' SQL query capabilities. Promscale is designed to simplify integration in any environment and provide a single storage system that is easy to deploy, manage, scale, and learn about. The platform exposes an ingest endpoint that is OTLP-compliant, making it straightforward to integrate with OpenTelemetry instrumentation. Traces stored in Promscale can be queried with full SQL and visualized using Jaeger or Grafana.