Top 11AI made for AI

Free ai infrastructure · observability in the Top 11

10 providers in the Top 11 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked offer a free tier; the most credible is LangSmith.

Why this answer

Filtered to entries with a published free tier (not just a free trial). When the pricing page is ambiguous we err conservative — paid-only by default.

Showing all 10 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked.

  1. #1LangSmith(rank #1 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full LangSmith review · Compare: LangSmith vs Arize AI · Alternatives

  2. #2Arize AI(rank #2 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Arize AI review · Alternatives

  3. #3Datadog(rank #3 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Datadog review · Alternatives

  4. #4Galileo(rank #4 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Galileo review · Alternatives

  5. #5WhyLabs(rank #5 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full WhyLabs review · Alternatives

  6. #6Helicone(rank #6 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Helicone review · Alternatives

  7. #7New Relic(rank #7 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full New Relic review · Alternatives

  8. #8Sentry(rank #9 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Sentry review · Alternatives

  9. #9Portkey(rank #10 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

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

    Full Portkey review · Alternatives

  10. #10OpenLLMetry(rank #11 in 11 Best LLM Monitoring & AI Observability Platforms 2026 — LangSmith Alternatives Ranked)

    Free tier

    A vendor-agnostic, open-source standard for adding LLM signals to OpenTelemetry traces.

    Full OpenLLMetry review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .