Datadog is a comprehensive observability platform combining metrics, logs, and traces. In 2026 with over 28,000 customers including Fortune 500 companies, it remains essential for cloud-native infrastructure monitoring. Key features include infrastructure monitoring for hosts containers and serverless, APM with distributed tracing, and AI-powered AIOps with Watchdog for automatic anomaly detection. Security features include Cloud SIEM and CSPM for compliance. Infrastructure costs 15 dollars per host monthly. APM starts at 31 dollars per host plus 10 cents per 1,000 spans. Log management is 10 cents per GB. Datadog provides 5 out of 5 coverage for infrastructure, APM, and logs. Best for cloud-native monitoring, DevOps observability, SRE operations, and security operations.