LangSmith
AI Agent & LLM Observability Platform
VS
Smith.ai
24/7 AI Receptionists & Live Human Agents
Detailed comparison
Criteria
LangSmith
Smith.ai
Pricing
Freemium
Paid
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Starter: $300/mo, Enterprise: Custom
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
—
API
Yes
No
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
Communication, information technology & services, Digital receptionist
Popularity
Very High
Very 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...
Smith.ai offers the best AI agents and live North America-based receptionists to capture and convert more leads. Call answering, intake, and schedulin...
Pricing
LangSmith
Freemium
Smith.ai
Paid
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Smith.ai
Starter: $300/mo, Enterprise: Custom
Free trial
LangSmith
No
Smith.ai
No
Audience
LangSmith
b2b
Smith.ai
b2b
Platforms
LangSmith
Web
Smith.ai
—
API
LangSmith
Yes
Smith.ai
No
Open Source
LangSmith
Proprietary
Smith.ai
Proprietary
Integrations
LangSmith
Pagerduty
Smith.ai
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Smith.ai
Communication, information technology & services, Digital receptionist
Popularity
LangSmith
Very High
Smith.ai
Very 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...
Smith.ai
Smith.ai offers the best AI agents and live North America-based receptionists to capture and convert more leads. Call answering, intake, and schedulin...
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
Smith.ai
AI Receptionists
Live Human Receptionists
Call Answering
Lead Intake
Appointment Scheduling
Custom Call Playbooks
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Smith.ai
- AI & Live North America-based receptionists
- Comprehensive call answering & lead intake
Other comparisons
FAQ: LangSmith vs Smith.ai
LangSmith: AI Agent & LLM Observability Platform. Smith.ai: 24/7 AI Receptionists & Live Human Agents. Both tools take different approaches to address similar needs.
LangSmith offers a freemium plan, while Smith.ai is a paid tool.
The best choice between LangSmith and Smith.ai 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. Smith.ai offers: AI Receptionists, Live Human Receptionists, Call Answering, Lead Intake.
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.