Datadog
Best for
Full-stack observability at scale — infrastructure, APM, logs, and LLM tracing in one platform
Limitations
Expensive at scale; LLM observability is newer and less mature than dedicated tools like Langfuse; vendor lock-in on proprietary data format
Features
Frameworks
SDK Languages
Compliance
Datadog
Datadog is a comprehensive cloud monitoring and observability platform. For AI agent developers, it offers LLM Observability as an extension of its existing APM product — tracing LLM calls, token usage, latency, and error rates alongside traditional infrastructure metrics.
The main advantage is consolidation: if your team already uses Datadog for infra and APM, adding LLM tracing means one fewer vendor. The tradeoff is that its LLM-specific features are less deep than purpose-built tools like Langfuse or Langsmith.