LangSmith
AI Agent & LLM Observability Platform
VS
Custom Agents
Autonomous AI teammates to automate tasks, connect apps, and streamline workflows.
Detailed comparison
Criteria
LangSmith
Custom Agents
Pricing
Freemium
Paid
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
AI Agents, Dev Tools, Productivity
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...
Notion Custom Agents are autonomous AI teammates designed to automate tasks, connect applications, and run in the background to handle repetitive work...
Pricing
LangSmith
Freemium
Custom Agents
Paid
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Custom Agents
—
Free trial
LangSmith
No
Custom Agents
—
Audience
LangSmith
b2b
Custom Agents
B2B
Platforms
LangSmith
Web
Custom Agents
—
API
LangSmith
Yes
Custom Agents
—
Open Source
LangSmith
Proprietary
Custom Agents
—
Integrations
LangSmith
Pagerduty
Custom Agents
—
Categories
LangSmith
Data Science, Dev Tools
Custom Agents
AI Agents, Dev Tools, Productivity
Popularity
LangSmith
Very High
Custom Agents
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...
Custom Agents
Notion Custom Agents are autonomous AI teammates designed to automate tasks, connect applications, and run in the background to handle repetitive work...
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
Custom Agents
Autonomous operation
Team-shareable workflows
Integrations with daily tools (Slack, Linear, GitHub)
Multi-step actions with memory
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Custom Agents
Other comparisons
FAQ: LangSmith vs Custom Agents
LangSmith: AI Agent & LLM Observability Platform. Custom Agents: Autonomous AI teammates to automate tasks, connect apps, and streamline workflows.. Both tools take different approaches to address similar needs.
LangSmith offers a freemium plan, while Custom Agents is a paid tool.
The best choice between LangSmith and Custom Agents 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 Custom Agents 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. Custom Agents offers: Autonomous operation, Team-shareable workflows, Integrations with daily tools (Slack, Linear, GitHub), Multi-step actions with memory.
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.