Arize AX vs W&B Weave

Arize AX9.4Visit W&B Weave9.0Visit

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

vs

W&B Weave #5 in LLM Observability Tools 9.0/10 Free plan · 30-day trial Free planFree trial✓ 6 of 6 features Visit W&B Weave

• Arize AX fits best

  Teams wanting broad, production-ready LLM observability

• W&B Weave fits best

  Growing teams wanting mature, broad observability

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Side by side

Feature	Arize AX 9.4/10 Visit ↗	W&B Weave 9.0/10 Visit ↗
At a glance
Editor score	9.4	9.0
Ranking	#1 in LLM Observability Tools	#5 in LLM Observability Tools
Best for	Teams wanting broad, production-ready LLM observability	Growing teams wanting mature, broad observability
Pricing model	Free plan + paid	Free plan + paid
Starting price	$50/mo (best)	$60/mo
Free plan	✓	✓
Free trial	—	30 days
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web	Web
Support	Email, Community, Docs	Email, Live chat, Community, Docs
Compliance	SOC 2, GDPR, HIPAA, SSO/SAML	SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML
Integrations	18 integrations	30+ integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Arize AX 6/6 · W&B Weave 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	Detailed tracing for LLM calls, agents, RAG steps, costs, and latency Evaluations, scorers, prompt versioning, and experimentation in one platform Web, API, and self-hosted deployment with broad framework integrations
Cons	Free plan limits usage to 10 Signal issues per month Enterprise pricing is custom Self-hosted deployment is available only on Enterprise	Weave data ingestion, storage, and some usage are billed separately The Free plan has community support rather than priority support Its broad feature set may exceed the needs of teams seeking simple tracing
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 →	W&B Weave is an observability and evaluation platform for teams building LLM applications and production agents. It records inputs, outputs, metadata, latency, token usage, costs, tool calls, and multi-step agent activity. The platform… 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

• W&B Weave — where it wins

  • Detailed tracing for LLM calls, agents, RAG steps, costs, and latency
  • Evaluations, scorers, prompt versioning, and experimentation in one platform
  • Web, API, and self-hosted deployment with broad framework integrations

  Where it doesn't

  • Weave data ingestion, storage, and some usage are billed separately
  • The Free plan has community support rather than priority support
  • Its broad feature set may exceed the needs of teams seeking simple tracing

• Arize AX9.4/10 · Free plan

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

  Visit Arize AXFull verdict →
• W&B Weave9.0/10 · Free plan · 30-day trial

  A broad observability suite for teams tracing, evaluating, and monitoring LLM applications.

  Visit W&B WeaveFull verdict →