Best AI Observability Tools
Compare 11 top-rated ai observability tools. Find features, pricing, pros, cons, and alternatives.
🏆 Top Tools in This Category
AgentOps
🔴DeveloperAgentOps review: developer observability for tracing, replaying, debugging, securing, and monitoring AI-agent sessions, tool calls, token use, and cost.
Arize Phoenix
🔴DeveloperArize Phoenix is an open-source AI observability and evaluation platform for tracing, testing, and improving LLM applications and agents.
Keywords AI / Respan
🔴DeveloperLLM monitoring and gateway platform for AI applications
Langfuse
An open-source observability and evaluation platform for language-model applications.
LangSmith
🔴DeveloperLangSmith is LangChain's commercial observability, evaluation and prompt management platform for LLM apps and agents in production.
Latitude
Latitude AI observability review covering agent traces, issue detection, human-aligned evaluations, verified pricing, integrations, benefits, and limitations.
New Relic Agentic Platform and MCP
Observability platform for applications and AI systems that gives operational context to engineering agents.
OpenObserve AI Observability
🔴DeveloperAn OpenTelemetry-native observability product for tracing agents, tool calls, and model requests while measuring quality, latency, token use, and cost.
PandaProbe
🔴DeveloperOpen-source AI agent engineering platform for tracing, evaluating, and debugging agent runs across any framework and LLM provider.
Traceloop
🔴DeveloperAn observability platform and open-source instrumentation toolkit for tracing language-model applications and agents using OpenTelemetry-compatible conventions.
AI Observability tools
AgentOps
🔴DeveloperAgentOps review: developer observability for tracing, replaying, debugging, securing, and monitoring AI-agent sessions, tool calls, token use, and cost.
Key Features:
- •Two-line SDK integration
- •Time travel debugging
- •Session replay analytics
Freemium
Arize Phoenix
🔴DeveloperArize Phoenix is an open-source AI observability and evaluation platform for tracing, testing, and improving LLM applications and agents.
Key Features:
- •LLM Tracing & Observability
- •Evaluation Framework
- •Experiment Management
Free open-source (Elastic License 2.0); hosted Arize Cloud tier; enterprise Arize AX
Keywords AI / Respan
🔴DeveloperLLM monitoring and gateway platform for AI applications
Key Features:
- •End-to-end agent tracing with prompt, tool call and response context
- •Evaluation workflows with human review, code checks and LLM judges
- •Gateway, observability, evaluations and prompt optimization features
Custom
Langfuse
An open-source observability and evaluation platform for language-model applications.
Key Features:
- •Hierarchical Tracing & Agent Debugging
- •Production Prompt Management & Versioning
- •LLM-as-Judge Evaluation Framework
Free tier + Cloud plans from $29/month
LangSmith
🔴DeveloperLangSmith is LangChain's commercial observability, evaluation and prompt management platform for LLM apps and agents in production.
Key Features:
- •Tracing for any LLM stack via Python/TypeScript SDKs or OpenTelemetry
- •LLM-as-judge, code-based and pairwise evaluations
- •Versioned prompts with production A/B traffic splits
Free Developer tier; Plus $39/user/month; Enterprise custom
Latitude
Latitude AI observability review covering agent traces, issue detection, human-aligned evaluations, verified pricing, integrations, benefits, and limitations.
Key Features:
- •Multi-turn traces with tool calls and full execution paths
- •Issue discovery and clustering across failed traces
- •Human-aligned evaluations with drift and alignment measurements
The official pricing page listed a non-expiring free Starter plan with 20,000 monthly credits. Team costs $99 per month with 100,000 credits, and additional credits cost $20 per 10,000. A trace costs one credit; hosted AI features can consume additional credits. Enterprise is custom.
PandaProbe
🔴DeveloperOpen-source AI agent engineering platform for tracing, evaluating, and debugging agent runs across any framework and LLM provider.
Key Features:
- •One-line instrument() call for full agent execution tracing
- •Framework-agnostic: Google ADK, LangChain, CrewAI, AutoGen, and more
- •Works with any LLM provider (OpenAI, Anthropic, Google, Mistral, local)
Custom
Traceloop
🔴DeveloperAn observability platform and open-source instrumentation toolkit for tracing language-model applications and agents using OpenTelemetry-compatible conventions.
Key Features:
- •LLM traces and prompt-response visibility
- •Agent and workflow spans
- •OpenTelemetry-compatible instrumentation
Custom
Weights & Biases Weave
🔴DeveloperAn observability and evaluation toolkit for tracing generative-AI applications, comparing outputs, managing evaluation datasets, and inspecting model behavior.
Key Features:
- •LLM tracing
- •evaluations
- •datasets
Custom
New Relic Agentic Platform and MCP
Observability platform for applications and AI systems that gives operational context to engineering agents.
Key Features:
- •Full-stack APM and logs
- •AI agent monitoring
- •OpenTelemetry support
Custom
OpenObserve AI Observability
🔴DeveloperAn OpenTelemetry-native observability product for tracing agents, tool calls, and model requests while measuring quality, latency, token use, and cost.
Key Features:
- •Agent and tool-call traces
- •Live quality scoring
- •Token, latency and cost attribution
Cloud Professional: $0.50/GB ingested + $0.01/GB queried; Enterprise: Custom; Self-hosted: Open-source/self-managed
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