Datadog APM now supports custom instrumentation for AWS Lambda using the OpenTelemetry Tracing API, enabling detailed insights into performance and security. This enhancement complements existing support for non-serverless applications and provides complete frontend-to-backend traces across any upstream or downstream service instrumented using OTel SDKs, Datadog's tracing libraries, Jaeger, or custom instrumentation that supports W3C trace headers. With complete support for W3C trace header propagation, developers can capture full end-to-end traces from any W3C-compliant service and get enriched visibility into serverless applications using vendor-neutral code. Datadog APM offers the best of both worlds, bringing together portability of custom OTel instrumentation with enriched visibility through features like tag enrichment, Cold Start Tracing, Lambda payload capture, profiling, and Application Security Management (ASM).