Arize AI

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ML and LLM observability

Free tier | AX Pro $50/mo +1ObservabilityLast verified: 2026-01-18

Overview

Arize AI for ML and LLM observability. Phoenix open source. Hallucination detection.

Works with

LangChainLlamaIndexOpenAIAnthropicPythonJavaScript

Pricing

FreePhoenix (Open Source)

Self-hosted
Unlimited users
User-managed trace spans
User-managed ingestion
User-managed retention
Agent tracing graphs
Spans and traces
Token and cost tracking
Framework integrations
Python and JavaScript SDKs
OpenTelemetry support
Datasets and experiments
Offline evaluations (LLM as Judge, Code Evals)
Prompt management
Community support
Dedicated support add-on available

Pros

+ML + LLM observability in one platform
+Hallucination detection
+Phoenix open source option
+Alyx AI co-pilot for debugging
+Online and offline evaluations
+SOC2 Type II and HIPAA (Enterprise)

Cons

-Enterprise pricing not transparent
-7-day retention on free tier
-AX Pro limited to 15-day retention

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Back

Arize AI

Visit site

ML and LLM observability

Free tier | AX Pro $50/mo +1ObservabilityLast verified: 2026-01-18

Overview

Arize AI for ML and LLM observability. Phoenix open source. Hallucination detection.

Works with

LangChainLlamaIndexOpenAIAnthropicPythonJavaScript

Pricing

FreePhoenix (Open Source)

Self-hosted
Unlimited users
User-managed trace spans
User-managed ingestion
User-managed retention
Agent tracing graphs
Spans and traces
Token and cost tracking
Framework integrations
Python and JavaScript SDKs
OpenTelemetry support
Datasets and experiments
Offline evaluations (LLM as Judge, Code Evals)
Prompt management
Community support
Dedicated support add-on available

Pros

+ML + LLM observability in one platform
+Hallucination detection
+Phoenix open source option
+Alyx AI co-pilot for debugging
+Online and offline evaluations
+SOC2 Type II and HIPAA (Enterprise)

Cons

-Enterprise pricing not transparent
-7-day retention on free tier
-AX Pro limited to 15-day retention

Find similar tools

Braintrust

Free tier +2

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PythonTypeScript+3

Braintrust

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Helicone

Free tier +2

Logging caching and rate limiting proxy

OpenAIAnthropic+1

Helicone

Free tier +2

Logging caching and rate limiting proxy

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Get Discovered by Developers

Promote your tool

Reach thousands of developers actively searching for AI tools. Featured listings get 10x more clicks.