Apache SkyWalking vs AWS X-Ray

Apache SkyWalking is a free, self-hosted observability platform for cloud-native systems and AI workloads. It brings traces, metrics, logs, and profiling together to help users explore services, Kubernetes, and infrastructure through topology, telemetry, profiles, and alerts. For AI workloads, users can inspect model and MCP call latency and token rates, and review agent conversations, tool calls, and recorded file changes. The project lists agents for Java, Python, NodeJS, Go, Rust, PHP, Ruby, Nginx LUA, Kong, and client-side JavaScript. Its integrations and ecosystem include OpenTelemetry OTLP, Istio, Envoy, Kubernetes, Grafana, and MCP. BanyanDB is described as a database for ingesting, analyzing, and storing observability data. Docker installation instructions cover Linux, macOS, WSL, and Windows PowerShell. Horizon UI supports SkyWalking natively since v11 and partially for v10. Its security documentation covers Content-Security-Policy, strict session cookies, no-store API responses, and optional login auditing. Apache source releases are official artifacts, with PGP or SHA512 verification recommended; the GraalVM distribution is marked experimental.

AWS X-Ray is a cloud service for collecting and examining application request traces. A trace can show request and response details alongside calls to downstream AWS resources, microservices, databases and web APIs. X-Ray also uses trace data to map clients, front-end services and backend services, helping identify bottlenecks and latency spikes.

Applications can send traces through X-Ray SDKs or APIs, AWS Distro for OpenTelemetry, or CloudWatch Application Signals. AWS integrations can add tracing headers, transmit data, run the daemon or instrument requests. For Lambda, the daemon can record invocation details, while the SDK can trace outgoing calls and add annotations and metadata. The SDK samples requests by default, with configurable sampling rules. Trace data is retained for 30 days and encrypted at rest; AWS Identity and Access Management controls access. X-Ray has a free allowance of 100,000 traces recorded and the first 1,000,000 traces retrieved or scanned per month; additional usage is billed by usage. Beginning February 25, 2026, AWS limits X-Ray SDK and daemon releases to security fixes and recommends migration to OpenTelemetry.