LangSmith
Research Team Data
Published
LLM evaluation and observability platform for agent engineering
Company profile
Overview
LangChain’s commercial platform for agent/LLM evaluation, tracing, prompt management, monitoring, annotation and deployment workflows.
LangSmith supports tracing, online/offline evaluations, prompt hub/playground, annotation queues, monitoring/alerting, agent deployment and agent-engineering workflows. It is part of LangChain’s broader agent engineering platform rather than a standalone company.
At a glance
Key facts
- HQ location
- San Francisco, CA, USA
- Founded
- 2023
- Employee range
- See LangChain
- Funding stage
- Series B
- Company type
- PrivateProduct of LangChain (Private)
- Last updated
- Pricing model
- SubscriptionUsage BasedUsage-based SaaS plans: Developer, Plus, Enterprise; pay-as-you-go traces/evals/features
Business context
Financials
- Revenue estimate
- Unknown / not publicly disclosed
- Valuation estimate
- See LangChain
- Investments
- See LangChain; LangChain announced $125M Series B at $1.25B valuation in Oct 2025
Market context
Relationships
- Target customers
- AI engineers, LLM product teams and enterprises building reliable agents
- Key competitors
- Humanloop, Galileo, Langfuse, Braintrust, Arize AI, Vellum
- Known customers
- Replit, Clay, Harvey, Vanta, Cloudflare, Rippling, Cisco, Workday
Source context
Classification (raw research text)
- Core focus
- LLM evaluation and monitoring
- Core industry
- Enterprise AI Development
- Core category
- LLM developer tooling
Shown verbatim from the research spreadsheet — deriving structured industry tags from this text is a future phase.
Market taxonomy
Segments, Industries & Certifications
Segments
AI WorkflowsAI AgentsAI Developer ToolsKnowledge & RAGLLM DeploymentAI Quality & ObservabilityAI Governance & RiskAnalytics & BI