Categories / Monitoring & LLM observability

Monitoring & LLM observability

Know when it breaks and what it costs.

Top pick

Sentry

Error and performance monitoring; the standard.

FreemiumLast verified 2026-10-15

PostHog

Product analytics, session replay and flags in one place.

FreemiumLast verified 2026-10-15

Langfuse

Tracing, evals and cost tracking for LLM apps.

Open source + cloudLast verified 2026-10-15

Helicone

LLM proxy that adds logging and cost tracking.

FreemiumLast verified 2026-10-15

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