Arize AX vs LangWatch

Arize AX9.4Visit LangWatch8.8Visit

Higher score Arize AX #1 in LLM Observability Tools 9.4/10 Free plan Free plan✓ 6 of 6 features Visit Arize AX

vs

LangWatch #7 in LLM Observability Tools 8.8/10 Free plan Free plan✓ 6 of 6 features Visit LangWatch

• Arize AX fits best

  Teams wanting broad, production-ready LLM observability

• LangWatch fits best

  Teams needing affordable agent and RAG visibility

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Side by side

Feature	Arize AX 9.4/10 Visit ↗	LangWatch 8.8/10 Visit ↗
At a glance
Editor score	9.4	8.8
Ranking	#1 in LLM Observability Tools	#7 in LLM Observability Tools
Best for	Teams wanting broad, production-ready LLM observability	Teams needing affordable agent and RAG visibility
Pricing model	Free plan + paid	Free plan + paid
Starting price	$50/mo	€29/seat/mo
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web	Web, Linux
Support	Email, Community, Docs	Community, Live chat, Docs
Compliance	SOC 2, GDPR, HIPAA, SSO/SAML	SOC 2, ISO 27001, GDPR, 2FA
Integrations	18 integrations	26+ integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Arize AX 6/6 · LangWatch 6/6
LLM tracing	✓	✓
LLM evaluations	✓	✓
Prompt management	✓	✓
Agent tracing	✓	✓
Retrieval tracing	✓	✓
Token cost tracking	✓	✓
Specs
Deployment options	Both	Both
Our review
Pros	Covers tracing, evaluations, prompts, agents, RAG, and cost tracking Supports SaaS and self-hosted deployment with Enterprise Connects with major LLM providers and agent frameworks	Nested agent tracing with execution graphs and cost tracking Evaluations, guardrails, simulations, and prompt versioning in one platform Broad SDK, framework, OpenTelemetry, and self-hosted deployment support
Cons	Free plan limits usage to 10 Signal issues per month Enterprise pricing is custom Self-hosted deployment is available only on Enterprise	Developer includes 50k events monthly and 14-day data access Enterprise capabilities require a custom plan The feature set may exceed the needs of teams wanting basic tracing only
Our verdict	Arize AX is an AI engineering platform for teams building AI agents and applications. It captures production traces, evaluates LLM, agent, human, and code quality signals, and supports experiments comparing prompts, models, and agent… Read the review →	LangWatch is an LLM engineering and observability platform for teams building AI agents and applications. It records LLM and agent traces with nested spans and execution graphs, tracks tokens, model costs, and latency, and captures RAG… Read the review →

Strengths and trade-offs

• Arize AX — where it wins

  • Covers tracing, evaluations, prompts, agents, RAG, and cost tracking
  • Supports SaaS and self-hosted deployment with Enterprise
  • Connects with major LLM providers and agent frameworks

  Where it doesn't

  • Free plan limits usage to 10 Signal issues per month
  • Enterprise pricing is custom
  • Self-hosted deployment is available only on Enterprise

• LangWatch — where it wins

  • Nested agent tracing with execution graphs and cost tracking
  • Evaluations, guardrails, simulations, and prompt versioning in one platform
  • Broad SDK, framework, OpenTelemetry, and self-hosted deployment support

  Where it doesn't

  • Developer includes 50k events monthly and 14-day data access
  • Enterprise capabilities require a custom plan
  • The feature set may exceed the needs of teams wanting basic tracing only

• Arize AX9.4/10 · Free plan

  Broad LLM observability with tracing, evaluations, prompts, agents, RAG, and cost tracking.

  Visit Arize AXFull verdict →
• LangWatch8.8/10 · Free plan

  Affordable visibility for agents, RAG pipelines, evaluations, and LLM costs.

  Visit LangWatchFull verdict →