LLM Observability Tools Compared: The 2026 Landscape

The LLM observability category is fragmented Search for "LLM observability" today and you'll get results from eight tools that do subtly different things. One is a tracing SDK you wire into your app. Another is a reverse proxy that logs every request. A third is an evals platform that happens to include tracing. A fourth is an enterprise ML monitoring product that added LLM support last year. They all claim the same keywords — tracing, observability, logging, cost tracking — but their architectu