LangSmith
AI Agent & LLM Observability Platform
VS
Vellum
Your desktop AI assistant that understands your context and acts on your behalf.
Detailed comparison
Criteria
LangSmith
Vellum
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free: Free, Business: $50/mo, Enterprise: Custom
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
Web
API
Yes
Yes
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Data Science, Dev Tools
AI Agents, Productivity
Popularity
Very High
Very High
Description
LangSmith is a comprehensive AI agent and LLM observability platform. It provides tracing and real-time monitoring to help developers debug agents, id...
Vellum is a desktop AI assistant designed to give you back your time. It understands your context, connects to your tools, and acts on your behalf to ...
Pricing
LangSmith
Freemium
Vellum
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Vellum
Free: Free, Business: $50/mo, Enterprise: Custom
Free trial
LangSmith
No
Vellum
No
Audience
LangSmith
b2b
Vellum
b2b
Platforms
LangSmith
Web
Vellum
Web
API
LangSmith
Yes
Vellum
Yes
Open Source
LangSmith
Proprietary
Vellum
Proprietary
Integrations
LangSmith
Pagerduty
Vellum
—
Categories
LangSmith
Data Science, Dev Tools
Vellum
AI Agents, Productivity
Popularity
LangSmith
Very High
Vellum
Very High
Description
LangSmith
LangSmith is a comprehensive AI agent and LLM observability platform. It provides tracing and real-time monitoring to help developers debug agents, id...
Vellum
Vellum is a desktop AI assistant designed to give you back your time. It understands your context, connects to your tools, and acts on your behalf to ...
Features
LangSmith
SDKs for Python, TypeScript, Go, and Java
Message threading for multi-turn chat interactions
Cost tracking
Online LLM-as-judge and code evals
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Vellum
Desktop AI assistant
Contextual understanding
Tool integration
Prepaid USD balance for usage
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Vellum
- AI agent building by description
- Full lifecycle AI agent management
Other comparisons
FAQ: LangSmith vs Vellum
LangSmith: AI Agent & LLM Observability Platform. Vellum: Your desktop AI assistant that understands your context and acts on your behalf.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Vellum is freemium.
The best choice between LangSmith and Vellum depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
LangSmith offers: SDKs for Python, TypeScript, Go, and Java, Message threading for multi-turn chat interactions, Cost tracking, Online LLM-as-judge and code evals. Vellum offers: Desktop AI assistant, Contextual understanding, Tool integration, Prepaid USD balance for usage.
Based on our data, LangSmith currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.