LangSmith
AI Agent & LLM Observability Platform
VS
Zealous
Your personal AI writing coach.
Detailed comparison
Criteria
LangSmith
Zealous
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
—
Free trial
No
—
Audience
b2b
b2c
Platforms
Web
—
API
Yes
—
Open Source
Proprietary
—
Integrations
Pagerduty
—
Categories
Data Science, Dev Tools
Content, Writing
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...
Zealous is an AI-powered writing coach that provides instant feedback, suggests improvements, and offers personalized guidance to enhance clarity, con...
Pricing
LangSmith
Freemium
Zealous
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Zealous
—
Free trial
LangSmith
No
Zealous
—
Audience
LangSmith
b2b
Zealous
b2c
Platforms
LangSmith
Web
Zealous
—
API
LangSmith
Yes
Zealous
—
Open Source
LangSmith
Proprietary
Zealous
—
Integrations
LangSmith
Pagerduty
Zealous
—
Categories
LangSmith
Data Science, Dev Tools
Zealous
Content, Writing
Popularity
LangSmith
Very High
Zealous
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...
Zealous
Zealous is an AI-powered writing coach that provides instant feedback, suggests improvements, and offers personalized guidance to enhance clarity, con...
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
Zealous
Instant feedback on writing
Personalized guidance and suggestions
Improve clarity and conciseness
Grammar and style correction
Support for various writing styles
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Zealous
Other comparisons
FAQ: LangSmith vs Zealous
LangSmith: AI Agent & LLM Observability Platform. Zealous: Your personal AI writing coach.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Zealous is freemium.
The best choice between LangSmith and Zealous 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.
LangSmith is primarily designed for individuals, while Zealous is built for individuals.
LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. Zealous offers: Instant feedback on writing, Personalized guidance and suggestions, Improve clarity and conciseness, Grammar and style correction.
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.