fast.ai
Making neural nets uncool again.
VS
LangSmith
AI Agent & LLM Observability Platform
Detailed comparison
Criteria
fast.ai
LangSmith
Pricing
Free
Freemium
Plans & pricing
Free: Free
Developer: Free, Team: $39/mo, Enterprise: Custom
Free trial
No
No
Audience
b2c
b2b
Platforms
Web
Web
API
No
Yes
Open Source
Open Source
Proprietary
Integrations
—
Pagerduty
Categories
Education, Data Science
Data Science, Dev Tools
Popularity
Very High
Very High
Description
fast.ai offers free, practical deep learning courses such as "Practical Deep Learning for Coders," "How to Solve it With Code," and "Applied Data Ethi...
LangSmith is a complete AI agent and LLM observability platform. It offers tracing and real-time monitoring to help developers debug agents, find fail...
Pricing
fast.ai
Free
LangSmith
Freemium
Plans & pricing
fast.ai
Free: Free
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Free trial
fast.ai
No
LangSmith
No
Audience
fast.ai
b2c
LangSmith
b2b
Platforms
fast.ai
Web
LangSmith
Web
API
fast.ai
No
LangSmith
Yes
Open Source
fast.ai
Open Source
LangSmith
Proprietary
Integrations
fast.ai
—
LangSmith
Pagerduty
Categories
fast.ai
Education, Data Science
LangSmith
Data Science, Dev Tools
Popularity
fast.ai
Very High
LangSmith
Very High
Description
fast.ai
fast.ai offers free, practical deep learning courses such as "Practical Deep Learning for Coders," "How to Solve it With Code," and "Applied Data Ethi...
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...
Features
fast.ai
Free practical deep learning courses, including 'Practical Deep Learning for Coders,' 'How to Solve it With Code,' and 'Applied Data Ethics'
Open-source fastai deep learning library for PyTorch
Open-source nbdev software for notebook development
Companion book: 'Practical Deep Learning for Coders with fastai and PyTorch'
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
Key differentiators
fast.ai
- Free, practical deep learning courses
- Open-source fastai library for PyTorch
- Emphasis on real-world AI applications
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Other comparisons
FAQ: fast.ai vs LangSmith
fast.ai: Making neural nets uncool again.. LangSmith: AI Agent & LLM Observability Platform. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. fast.ai is free and LangSmith is freemium.
The best choice between fast.ai and LangSmith 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.
fast.ai is primarily designed for individuals, while LangSmith is built for individuals.
fast.ai offers: Free practical deep learning courses, including 'Practical Deep Learning for Coders,' 'How to Solve it With Code,' and 'Applied Data Ethics', Open-source fastai deep learning library for PyTorch, Open-source nbdev software for notebook development, Companion book: 'Practical Deep Learning for Coders with fastai and PyTorch'. LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts.
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.