LangSmith
AI Agent & LLM Observability Platform
VS
Seamless.AI
Best AI Sales Software & Business Leads Platform
Detailed comparison
Criteria
LangSmith
Seamless.AI
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free: Free, Enterprise: Custom
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
Web
API
Yes
No
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
Marketing & Sales, information technology & services, Sales Leads
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...
Seamless.AI is the #1 rated sales lead AI software for businesses. It helps sales professionals to do B2B direct dials, find mobile numbers, and verif...
Pricing
LangSmith
Freemium
Seamless.AI
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Seamless.AI
Free: Free, Enterprise: Custom
Free trial
LangSmith
No
Seamless.AI
No
Audience
LangSmith
b2b
Seamless.AI
b2b
Platforms
LangSmith
Web
Seamless.AI
Web
API
LangSmith
Yes
Seamless.AI
No
Open Source
LangSmith
Proprietary
Seamless.AI
Proprietary
Integrations
LangSmith
Pagerduty
Seamless.AI
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Seamless.AI
Marketing & Sales, information technology & services, Sales Leads
Popularity
LangSmith
Very High
Seamless.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...
Seamless.AI
Seamless.AI is the #1 rated sales lead AI software for businesses. It helps sales professionals to do B2B direct dials, find mobile numbers, and verif...
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
Seamless.AI
AI-Powered Lead Generation
B2B Direct Dials & Mobile Numbers
Verified Email Addresses
Real-time Search Engine
Chrome Extension
Premium Integrations
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Seamless.AI
- #1 rated AI sales lead software
- B2B direct dials, mobile numbers, emails
- Real-time search engine for leads
Other comparisons
FAQ: LangSmith vs Seamless.AI
LangSmith: AI Agent & LLM Observability Platform. Seamless.AI: Best AI Sales Software & Business Leads Platform. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Seamless.AI is freemium.
The best choice between LangSmith and Seamless.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. Seamless.AI offers: AI-Powered Lead Generation, B2B Direct Dials & Mobile Numbers, Verified Email Addresses, Real-time Search Engine.
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.