LangSmith
AI Agent & LLM Observability Platform
VS
Lightning AI
Turn ideas into AI, Lightning fast.
Detailed comparison
Criteria
LangSmith
Lightning AI
Pricing
Freemium
Freemium
Plans & pricing
Developer: Free, Team: $39/mo, Enterprise: Custom
Free: Free, Pro: $20/mo, Teams: $119/mo, Enterprise: Custom
Free trial
No
No
Audience
b2b
b2b
Platforms
Web
Web
API
Yes
Yes
Open Source
Proprietary
Proprietary
Integrations
Pagerduty
—
Categories
Dev & Tech, information technology & services, Apps
AI & ML, information technology & services, Models
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...
Lightning AI is the all-in-one platform for AI development. Users can code together, prototype, train, scale, and serve models directly from their bro...
Pricing
LangSmith
Freemium
Lightning AI
Freemium
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Lightning AI
Free: Free, Pro: $20/mo, Teams: $119/mo, Enterprise: Custom
Free trial
LangSmith
No
Lightning AI
No
Audience
LangSmith
b2b
Lightning AI
b2b
Platforms
LangSmith
Web
Lightning AI
Web
API
LangSmith
Yes
Lightning AI
Yes
Open Source
LangSmith
Proprietary
Lightning AI
Proprietary
Integrations
LangSmith
Pagerduty
Lightning AI
—
Categories
LangSmith
Dev & Tech, information technology & services, Apps
Lightning AI
AI & ML, information technology & services, Models
Popularity
LangSmith
Very High
Lightning 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...
Lightning AI
Lightning AI is the all-in-one platform for AI development. Users can code together, prototype, train, scale, and serve models directly from their bro...
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
Lightning AI
Collaborative AI development
Zero-setup browser environment
Model prototyping and training
Scalable model serving
Built by PyTorch Lightning creators
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Lightning AI
- Unified AI development platform
- Zero-setup, browser-based workflow
- Built by PyTorch Lightning creators
Other comparisons
FAQ: LangSmith vs Lightning AI
LangSmith: AI Agent & LLM Observability Platform. Lightning AI: Turn ideas into AI, Lightning fast.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Lightning AI is freemium.
The best choice between LangSmith and Lightning 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. Lightning AI offers: Collaborative AI development, Zero-setup browser environment, Model prototyping and training, Scalable model serving.
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.