best apm tools for .net core applications

why .net core needs proper apm

.NET Core applications — especially those running microservices, containers, or serverless functions — generate a firehose of telemetry. Without a solid application performance monitoring (APM) tool, you're flying blind when latency spikes, errors cascade, or a distributed trace vanishes into a black hole.

The right APM gives you distributed tracing, real-time metrics, and log correlation so you can pinpoint exactly which service, query, or endpoint is causing trouble.1 Here's our take on the four best options, ranked by fit for .NET Core teams.

1. datadog apm — best for full-stack observability

Best for: Teams that want one platform for metrics, traces, logs, and security across a polyglot microservices stack.

Datadog APM provides automatic instrumentation for .NET Core via its tracing library, with support for OpenTelemetry ingestion.1 You get distributed tracing with flame graphs, service maps, and real-time dashboards. The platform also correlates traces with logs and infrastructure metrics, which is invaluable when debugging a slow endpoint that's actually a CPU-bound container.

Key strengths for .NET Core:

• Automatic instrumentation for ASP.NET Core, Entity Framework Core, and HttpClient
• Native OpenTelemetry support (OTLP ingestion)
• AI-driven anomaly detection on trace data
• 15-month retention for traces (paid plans)

Trade-off: Pricing scales with host count and ingested spans — costs can climb fast for high-throughput services.

→ check datadog apm

2. dynatrace — best for enterprise root-cause analysis

Best for: Large organizations that need automated root-cause analysis and topology mapping without manual configuration.

Dynatrace uses its Davis AI engine to automatically discover service dependencies, detect anomalies, and pinpoint root causes — often before your users notice.2 For .NET Core, it provides one-agent instrumentation with PurePath distributed tracing, capturing every transaction end-to-end.

Key strengths for .NET Core:

• Automatic discovery of .NET Core service topologies
• Davis AI for root-cause analysis (reduces MTTR significantly)
• Real-user monitoring (RUM) integrated with backend traces
• Supports OpenTelemetry alongside its own agent

Trade-off: Enterprise licensing means it's expensive for smaller teams. The agent is heavier than some alternatives.

→ check dynatrace

3. new relic apm — best all-in-one for debugging microservices

Best for: Engineering teams that want deep code-level visibility and error tracking in a single platform.

New Relic APM offers automatic instrumentation for .NET Core, with transaction traces, error analytics, and distributed tracing across services.3 The platform's query-based interface (NRQL) lets you slice telemetry data however you want, and the new entity explorer gives you a clean view of your entire .NET Core estate.

Key strengths for .NET Core:

• Automatic instrumentation for .NET Core 3.1+ and .NET 6+
• Distributed tracing with W3C trace context support
• Code-level diagnostics (slow transaction breakdowns)
• Generous free tier (100 GB/month of data ingest)

Trade-off: The UI can feel busy, and some advanced features (like AIOps) require higher-tier plans.

→ check new relic apm

4. signoz — best open-source, opentelemetry-native alternative

Best for: Teams that want full control over their observability data and prefer an open-source, self-hosted approach.

SigNoz is an OpenTelemetry-native observability platform that combines metrics, traces, and logs in a single interface.4 For .NET Core, you instrument your application using the standard OpenTelemetry .NET SDK — no proprietary agents needed. SigNoz ingests OTLP data and provides flame graphs, service maps, and custom dashboards.

Key strengths for .NET Core:

• 100% OpenTelemetry-native — no vendor lock-in
• Self-hosted (Docker/Kubernetes) or cloud option
• Distributed tracing with exact span-level detail
• Significantly lower cost than enterprise alternatives

Trade-off: Self-hosting requires operational overhead (managing ClickHouse, query service). The UI is less polished than Datadog or Dynatrace.

→ check signoz

comparison at a glance

which one should you pick?

• Go with Datadog if you're already in the Datadog ecosystem and need a unified platform for metrics, traces, logs, and security across .NET Core and other stacks.
• Go with Dynatrace if you're a large enterprise with complex .NET Core deployments and want AI-driven root-cause analysis to reduce MTTR.
• Go with New Relic if you want a strong free tier, deep code-level visibility, and don't mind a slightly busier UI.
• Go with SigNoz if you value open source, want OpenTelemetry-native instrumentation, and have the ops capacity to self-host.

Disclosure: Some links on this page are affiliate links. If you sign up through them, we may earn a commission at no extra cost to you. We only recommend tools we've researched and believe deliver real value for .NET Core teams.