Top 11AI made for AI

Alternatives to OpenLLMetry

OpenLLMetry ranks #11 on the Top 11 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked. Below: the higher-ranked alternatives we’d steer you to instead, by use case.

Verified . No paid placement — see methodology.

  1. #1LangSmith

    9.2 / 9.4

    The essential, purpose-built observability tool for the massive LangChain ecosystem, offering unmatched debugging depth.

    Best for: Deep debugging for LangChain apps · Pricing: $$ ($75 to $500/mo) · www.langchain.com/langsmith

  2. #2Arize AI

    9 / 9.4

    A mature, enterprise-ready platform with deep roots in ML monitoring, excelling at drift and RAG evaluation.

    Best for: Enterprise-grade model performance monitoring · Pricing: $$$ ($599 to $2,000+/mo) · arize.com

  3. #3Datadog

    8.8 / 9.4

    A strong, integrated LLM observability solution for companies already committed to the Datadog platform.

    Best for: Unified observability for existing users · Pricing: $$$ (Usage-based) · www.datadoghq.com/product/llm-observability/

  4. #4Galileo

    8.6 / 9.4

    A data-centric platform excelling at RAG evaluation, hallucination detection, and unstructured data quality.

    Best for: Data-centric RAG evaluation & monitoring · Pricing: $$$$ (Custom Enterprise) · www.rungalileo.io/

  5. #5WhyLabs

    8.4 / 9.4

    A mature, data-first monitoring platform built on the popular open-source whylogs library.

    Best for: Data drift and quality monitoring · Pricing: $$$ ($500 to $2,500/mo) · whylabs.ai/

  6. #6Helicone

    8.2 / 9.4

    A simple, elegant API proxy for LLM logging, caching, and analytics with near-zero setup friction.

    Best for: Simple, developer-first API monitoring · Pricing: $ ($40 to $200/mo) · www.helicone.ai/

  7. #7New Relic

    8 / 9.4

    A robust, integrated AI monitoring solution for the extensive New Relic enterprise customer base.

    Best for: Integrated AI monitoring for NR users · Pricing: $$$ (Usage-based) · newrelic.com/platform/ai-monitoring

  8. #8Fiddler AI

    7.8 / 9.4

    A responsible AI platform with strong explainability, bias detection, and governance features for enterprises.

    Best for: Explainability and responsible AI monitoring · Pricing: $$$$ (Custom Enterprise) · www.fiddler.ai/

  9. #9Sentry

    7.6 / 9.4

    Connects LLM pipeline issues directly to application errors and traces for existing Sentry users.

    Best for: AI error tracking for Sentry users · Pricing: $$ ($26 to $400/mo) · sentry.io/for/ai/

  10. #10Portkey

    7.4 / 9.4

    An AI gateway that bundles observability with caching, retries, and model routing features.

    Best for: AI gateway with integrated observability · Pricing: $$ ($100 to $500/mo) · portkey.ai/

See the full ranked list: 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked. Or compare any two: side-by-side.