Langsmith
View pricing & features
Langsmith
Debug, test, and monitor LLM applications in production
What is Langsmith?
LangSmith is an observability and testing platform for LLM applications, built by the creators of LangChain. It provides detailed tracing of every step in your AI pipeline — seeing exactly which prompts were sent, what the model returned, and how long each step took. The evaluation tools let you test prompts against datasets, compare model outputs, and track quality over time. In production, it monitors for regressions, latency spikes, and cost anomalies. Essential for teams building production AI applications.
Key Features
✓ Pros
- Best LLM debugging tool
- Great with LangChain
- Detailed tracing
- Free tier
✗ Cons
- LangChain-centric
- Complex for beginners
- UI can be overwhelming
Frequently Asked Questions
How much does Langsmith cost?
Langsmith uses a freemium pricing model starting from $0/mo.
Is Langsmith worth it?
Langsmith has an Editor's Score of 4.2/5 on ToolPilot. Key strengths include best llm debugging tool. However, langchain-centric.
What are the best alternatives to Langsmith?
Top alternatives include Cursor, GitHub Copilot, Replit AI, v0 by Vercel. Compare them for detailed feature and pricing breakdowns.
Starting from
$0/mo
Freemium
We may earn a commission at no cost to you
Quick Info
- Category
- Coding & Dev Tools
- Pricing Model
- Freemium
- Starting Price
- $0/mo
- Editor's Score
- 4.2/5
- Added
- 2026-02-15
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