LangSmith
AI Agent & LLM Observability Platform
VS
Prometheus
Open-source monitoring and alerting toolkit for cloud-native systems, tracking time-series data.
Detailed comparison
Criteria
LangSmith
Prometheus
Pricing
Freemium
Free
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, Data & Analytics, Operations
Popularity
Very High
Moderate
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...
Prometheus is an open-source systems monitoring and alerting toolkit designed for reliability in cloud-native environments. It specializes in collecti...
Pricing
LangSmith
Freemium
Prometheus
Free
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Prometheus
—
Free trial
LangSmith
No
Prometheus
—
Audience
LangSmith
b2b
Prometheus
B2B
Platforms
LangSmith
Web
Prometheus
—
API
LangSmith
Yes
Prometheus
—
Open Source
LangSmith
Proprietary
Prometheus
—
Integrations
LangSmith
Pagerduty
Prometheus
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Prometheus
Dev & Tech, Data & Analytics, Operations
Popularity
LangSmith
Very High
Prometheus
Moderate
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...
Prometheus
Prometheus is an open-source systems monitoring and alerting toolkit designed for reliability in cloud-native environments. It specializes in collecti...
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
Prometheus
Multi-dimensional data model with key-value dimensions.
PromQL, a powerful and flexible query language.
Precise alerting rules and a separate Alertmanager component.
Service discovery and a pull-based data collection model.
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Prometheus
Other comparisons
FAQ: LangSmith vs Prometheus
LangSmith: AI Agent & LLM Observability Platform. Prometheus: Open-source monitoring and alerting toolkit for cloud-native systems, tracking time-series data.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Prometheus is free.
The best choice between LangSmith and Prometheus 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 Prometheus is built for businesses and professionals.
LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. Prometheus offers: Multi-dimensional data model with key-value dimensions., PromQL, a powerful and flexible query language., Precise alerting rules and a separate Alertmanager component., Service discovery and a pull-based data collection model..
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.