LangSmith
AI Agent & LLM Observability Platform
VS
AI SDK
The AI Toolkit for TypeScript, from the creators of Next.js.
Detailed comparison
Criteria
LangSmith
AI SDK
Pricing
Freemium
Free
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free: Free
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
Web
API
Yes
Yes
Open Source
Proprietary
Open Source
Integrations
Pagerduty
—
Categories
Data Science, Dev Tools
Dev Tools
Popularity
Very High
Very High
Description
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
The AI SDK is a free, open-source library from the creators of Next.js. It provides a comprehensive toolkit for TypeScript developers to build AI-powe...
Pricing
LangSmith
Freemium
AI SDK
Free
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
AI SDK
Free: Free
Free trial
LangSmith
No
AI SDK
No
Audience
LangSmith
b2b
AI SDK
b2b
Platforms
LangSmith
Web
AI SDK
Web
API
LangSmith
Yes
AI SDK
Yes
Open Source
LangSmith
Proprietary
AI SDK
Open Source
Integrations
LangSmith
Pagerduty
AI SDK
—
Categories
LangSmith
Data Science, Dev Tools
AI SDK
Dev Tools
Popularity
LangSmith
Very High
AI SDK
Very High
Description
LangSmith
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
AI SDK
The AI SDK is a free, open-source library from the creators of Next.js. It provides a comprehensive toolkit for TypeScript developers to build AI-powe...
Features
LangSmith
Cost tracking
Online LLM-as-judge and code evals
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Message threading for multi-turn chat interactions
Templates for error analysis
AI SDK
AI SDK Docs
Tools Registry
AI Elements
AI Gateway
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
AI SDK
- Open-source, free library for AI dev
- From creators of Next.js, TypeScript-focused
- Comprehensive toolkit for AI UIs & products
Other comparisons
FAQ: LangSmith vs AI SDK
LangSmith: AI Agent & LLM Observability Platform. AI SDK: The AI Toolkit for TypeScript, from the creators of Next.js.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and AI SDK is free.
The best choice between LangSmith and AI SDK 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: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. AI SDK offers: AI SDK Docs, Tools Registry, AI Elements, AI Gateway.
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.