SigNoz is an open-source observability platform that offers error tracking, APM, logs, and metrics, using OpenTelemetry. It supports session replay, trace analysis, alerting, and customizable dashboards with full-stack visibility.

SigNoz is fully open-source and self-hosted, making it fully usable in China. Engineers can deploy it on Alibaba/Tencent/Huawei Cloud without restrictions, benefiting from complete observability without reliance on blocked SaaS providers. It's a popular free alternative to hosted APM platforms.

The information regarding service availability in China is provided for general reference purposes only. Due to the dynamic nature of network conditions and regulatory environments, the actual accessibility of these services may vary over time and by location. Users are advised to verify the current status independently.