LangSmith
AI Agent & LLM Observability Platform
VS
What The Diff
Your AI assistant for clear, concise, and accurate pull request summaries.
Detailed comparison
Criteria
LangSmith
What The Diff
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
—
Free trial
No
—
Audience
b2b
b2b
Platforms
Web
—
API
Yes
—
Open Source
Proprietary
—
Integrations
Pagerduty
—
Categories
Data Science, Dev Tools
Avatars, Design
Popularity
Very High
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...
What The Diff is an AI assistant that automatically summarizes your pull requests. It integrates directly with GitHub to provide clear, concise, and a...
Pricing
LangSmith
Freemium
What The Diff
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
What The Diff
—
Free trial
LangSmith
No
What The Diff
—
Audience
LangSmith
b2b
What The Diff
b2b
Platforms
LangSmith
Web
What The Diff
—
API
LangSmith
Yes
What The Diff
—
Open Source
LangSmith
Proprietary
What The Diff
—
Integrations
LangSmith
Pagerduty
What The Diff
—
Categories
LangSmith
Data Science, Dev Tools
What The Diff
Avatars, Design
Popularity
LangSmith
Very High
What The Diff
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...
What The Diff
What The Diff is an AI assistant that automatically summarizes your pull requests. It integrates directly with GitHub to provide clear, concise, and a...
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
What The Diff
AI-powered pull request summaries
Integrates with GitHub, Slack, and Email
Generates clear, concise, and accurate summaries
Customizable summary generation
Saves time on code reviews
Helps teams focus on code, not documentation
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
What The Diff
Other comparisons
FAQ: LangSmith vs What The Diff
LangSmith: AI Agent & LLM Observability Platform. What The Diff: Your AI assistant for clear, concise, and accurate pull request summaries.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and What The Diff is freemium.
The best choice between LangSmith and What The Diff 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. What The Diff offers: AI-powered pull request summaries, Integrates with GitHub, Slack, and Email, Generates clear, concise, and accurate summaries, Customizable summary generation.
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.