LangSmith
AI Agent & LLM Observability Platform
VS
RegExer
A simple and powerful visual regex tester
Detailed comparison
Criteria
LangSmith
RegExer
Pricing
Freemium
Free
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
Regex, Specialized Technologies
Popularity
Very High
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...
RegExer is an open-source web application designed to help developers create, test, and debug regular expressions with real-time feedback and detailed...
Pricing
LangSmith
Freemium
RegExer
Free
Plans & pricing
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
RegExer
—
Free trial
LangSmith
No
RegExer
—
Audience
LangSmith
b2b
RegExer
b2b
Platforms
LangSmith
Web
RegExer
—
API
LangSmith
Yes
RegExer
—
Open Source
LangSmith
Proprietary
RegExer
—
Integrations
LangSmith
Pagerduty
RegExer
—
Categories
LangSmith
Data Science, Dev Tools
RegExer
Regex, Specialized Technologies
Popularity
LangSmith
Very High
RegExer
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...
RegExer
RegExer is an open-source web application designed to help developers create, test, and debug regular expressions with real-time feedback and detailed...
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
RegExer
Real-time regex testing
Syntax highlighting
Visual pattern explanation
Regex cheat sheet
Support for multiple regex flavors
Key differentiators
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
RegExer
Other comparisons
FAQ: LangSmith vs RegExer
LangSmith: AI Agent & LLM Observability Platform. RegExer: A simple and powerful visual regex tester. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and RegExer is free.
The best choice between LangSmith and RegExer 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. RegExer offers: Real-time regex testing, Syntax highlighting, Visual pattern explanation, Regex cheat sheet.
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.