LangSmith
AI Agent & LLM Observability Platform
VS
Weavel
Automated Prompt Engineering for LLMs
Detailed comparison
Criteria
LangSmith
Weavel
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
Dev & Tech, information technology & services, Apps
Dev & Tech, Prompt engineering
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...
Weavel is an AI-powered platform that helps developers automatically optimize and evaluate prompts to improve model performance and reduce token costs...
Pricing
LangSmith
Freemium
Weavel
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Weavel
—
Free trial
LangSmith
No
Weavel
—
Audience
LangSmith
b2b
Weavel
b2b
Platforms
LangSmith
Web
Weavel
—
API
LangSmith
Yes
Weavel
—
Open Source
LangSmith
Proprietary
Weavel
—
Integrations
LangSmith
Pagerduty
Weavel
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Weavel
Dev & Tech, Prompt engineering
Popularity
LangSmith
Very High
Weavel
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...
Weavel
Weavel is an AI-powered platform that helps developers automatically optimize and evaluate prompts to improve model performance and reduce token costs...
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
Weavel
Automated Prompt Optimization
Prompt Evaluation & Benchmarking
Dataset Generation
Multi-model Support
Version Control for Prompts
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Weavel
Other comparisons
FAQ: LangSmith vs Weavel
LangSmith: AI Agent & LLM Observability Platform. Weavel: Automated Prompt Engineering for LLMs. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Weavel is freemium.
The best choice between LangSmith and Weavel 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. Weavel offers: Automated Prompt Optimization, Prompt Evaluation & Benchmarking, Dataset Generation, Multi-model Support.
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.