Arthur vs LangSmith

Vendor decision canvas

Evidence sheet
Vendor 1
Arthur logo
ArthurAI Observability

AI observability and evaluation platform for LLM and traditional ML models.

No reviewsRating2018Founded
Vendor 2
LangSmith logo
LangSmithAI Observability

LangSmith is LangChain's platform for debugging, testing, evaluating, and monitoring LLM applications and agent workflows.

$39+ / seat / monthPriceNo reviewsRating2023Founded
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Arthur + LangSmith can move into a shared evaluation.

Evidence sheet

2-vendor view
Vendor evidence comparison for Arthur, LangSmith
Vendor 1
Arthur logo
Arthur
AI Observability

Ship Reliable AI Agents Fast

Vendor 2
LangSmith logo
LangSmith
AI Observability

Debug, test, and monitor LLM apps.

Overview
CategoryAI ObservabilityAI Observability
What it isAI observability and evaluation platform for LLM and traditional ML models.LangSmith is LangChain's platform for debugging, testing, evaluating, and monitoring LLM applications and agent workflows.
Pricing
PriceNot available$39+ / seat / month
Pricing modelTiered plansTiered plans
Free optionsFree plan, Free trialFree plan, Free trial
Company
Founded20182023
Team size51-200 employees201-500 employees
HeadquartersWashington, DCSan Francisco, CA

Where these sit in AI Observability

  • LangSmith$39 / month
  • AI Observability median$79.5 / month

Typical monthly range: $39.25–$186.75 per seat. 32% are priced on request.

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