OpenTelemetry is the open-source observability standard under CNCF (Cloud Native Computing Foundation), unifying distributed traces, metrics, and logs data collection. Formed from the merger of OpenTracing and OpenCensus in 2019.
Google Cloud Monitoring (formerly Stackdriver) is Google Cloud's native observability platform, providing GCP-wide metric collection, Cloud Logging log management, and Error Reporting, with Managed Prometheus and Grafana integration.
Azure Monitor is Microsoft Azure's full-stack monitoring platform, providing VM, AKS, and application metrics, log analytics, and Application Insights APM, deeply integrated with the Azure ecosystem.
Amazon CloudWatch is AWS's native monitoring and observability service, providing metrics, logs, and alarm management across 200+ AWS services, with Logs Insights analysis and X-Ray distributed tracing.
Founded in 2001 and headquartered in Riga, Latvia, Zabbix is an open-source enterprise monitoring platform deployed by 10000+ enterprises. A single server manages 10000+ devices with distributed Proxy architecture.
Prometheus, started by SoundCloud in 2012, is a CNCF-graduated open-source monitoring and alerting system that uses a Pull model with built-in PromQL - the de-facto monitoring standard for cloud-native and Kubernetes environments.
Sematext is a full-stack observability platform integrating infrastructure monitoring, APM, log management, and synthetic monitoring, available as cloud-hosted or self-hosted.
Riemann is a 2012-released open-source event stream processor built in Clojure for millisecond-level low-latency processing. It supports high-throughput event aggregation, filtering, transformation, and correlation with TCP/UDP multi-protocol ingestion for real-time monitoring event routing.