LangSmith
AI Agent & LLM Observability Platform
VS
Protonic
Observability for LLM-powered applications
Detailed comparison
Criteria
LangSmith
Protonic
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
Data Science, Dev Tools
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...
A developer-focused platform for monitoring, debugging, and optimizing Large Language Model applications. It helps teams track performance, manage cos...
Pricing
LangSmith
Freemium
Protonic
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Protonic
—
Free trial
LangSmith
No
Protonic
—
Audience
LangSmith
b2b
Protonic
b2b
Platforms
LangSmith
Web
Protonic
—
API
LangSmith
Yes
Protonic
—
Open Source
LangSmith
Proprietary
Protonic
—
Integrations
LangSmith
Pagerduty
Protonic
—
Categories
LangSmith
Data Science, Dev Tools
Protonic
Data Science, Dev Tools
Popularity
LangSmith
Very High
Protonic
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...
Protonic
A developer-focused platform for monitoring, debugging, and optimizing Large Language Model applications. It helps teams track performance, manage cos...
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
Protonic
LLM Observability
Real-time Tracing
Cost & Token Tracking
Performance Monitoring
Prompt Debugging
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Protonic
Other comparisons
FAQ: LangSmith vs Protonic
LangSmith: AI Agent & LLM Observability Platform. Protonic: Observability for LLM-powered applications. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Protonic is freemium.
The best choice between LangSmith and Protonic 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. Protonic offers: LLM Observability, Real-time Tracing, Cost & Token Tracking, Performance Monitoring.
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.