functime
High-performance time-series forecasting at scale
VS
LangSmith
AI Agent & LLM Observability Platform
Detailed comparison
Criteria
functime
LangSmith
Pricing
Freemium
Freemium
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
Finance, Business forecasting
Data Science, Dev Tools
Popularity
Moderate
Very High
Description
An open-source library and platform for large-scale time-series forecasting, feature engineering, and anomaly detection built on top of Polars.
LangSmith is a comprehensive AI agent and LLM observability platform. It provides tracing and real-time monitoring to help developers debug agents, id...
Pricing
functime
Freemium
LangSmith
Freemium
Plans & pricing
functime
—
LangSmith
Developer: Free, Team: $39/mo, Enterprise: Custom
Free trial
functime
—
LangSmith
No
Audience
functime
b2b
LangSmith
b2b
Platforms
functime
—
LangSmith
Web
API
functime
—
LangSmith
Yes
Open Source
functime
—
LangSmith
Proprietary
Integrations
functime
—
LangSmith
Pagerduty
Categories
functime
Finance, Business forecasting
LangSmith
Data Science, Dev Tools
Popularity
functime
Moderate
LangSmith
Very High
Description
functime
An open-source library and platform for large-scale time-series forecasting, feature engineering, and anomaly detection built on top of Polars.
LangSmith
LangSmith is a comprehensive AI agent and LLM observability platform. It provides tracing and real-time monitoring to help developers debug agents, id...
Features
functime
Automated ML for time-series
Fast feature engineering using Polars
Global forecasting models
Anomaly detection for large datasets
Production-ready Python API
LangSmith
SDKs for Python, TypeScript, Go, and Java
Message threading for multi-turn chat interactions
Cost tracking
Online LLM-as-judge and code evals
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Key differentiators
functime
LangSmith
- Complete AI agent & LLM observability
- Real-time tracing, debugging & evals
- Cost, latency & trajectory monitoring
Other comparisons
FAQ: functime vs LangSmith
functime: High-performance time-series forecasting at scale. LangSmith: AI Agent & LLM Observability Platform. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. functime is freemium and LangSmith is freemium.
The best choice between functime 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.
Both are primarily designed for individuals. The choice depends on which specific features you need.
functime offers: Automated ML for time-series, Fast feature engineering using Polars, Global forecasting models, Anomaly detection for large datasets. LangSmith offers: SDKs for Python, TypeScript, Go, and Java, Message threading for multi-turn chat interactions, Cost tracking, Online LLM-as-judge and code evals.
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.