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Overview
LangSmith is a comprehensive AI agent and LLM observability platform with tracing and real-time monitoring. It helps developers debug agents, find failures fast, and track costs and latency. The platform provides features like SDKs for multiple programming languages, message threading, and cost tracking. It also offers tool and agent trajectory monitoring, webhook and PagerDuty alerts, and more.
Features
SDKs for Python, TypeScript, Go, and Java
Message threading for multi-turn chat interactions
Cost tracking
Tool and agent trajectory monitoring
Webhook and Pagerduty alerts
Unsupervised topic clustering
Plans & Pricing
FreeFree
$0/mo
Up to 5k base traces / mo
DeveloperFree
$0/mo
For solo users getting started
Team
$39/mo
Unlimited seats, 5k base traces / mo
Enterprise
Custom
Advanced hosting, security, and support
Last checked: 2026-04-18
What's New with LangSmith
Latest news, updates, and media coverage
Mar 23·90
Andrej Karpathy says AI agents write 80% of his code, speeding development
Mar 16·90
Anduril AI systems land $20B Army deal; IBM, Zhipu release compact models
Mar 16·93
OpenClaw AI Agent Ecosystem Expands with RL, Memory, Governance Tools
Mar 16·80
AI expands into new applications; deepfake detection and misinformation fight grow
Mar 15·95
China boosts OpenClaw AI agent startups with millions in subsidies
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Frequently asked questions about LangSmith
Yes, LangSmith offers a freemium plan. AI Observability Platform
LangSmith is a comprehensive AI agent and LLM observability platform with tracing and real-time monitoring. It helps developers debug agents, find failures fast, and track costs and latency. The platf...
Key features of LangSmith include: SDKs for Python, TypeScript, Go, and Java, Message threading for multi-turn chat interactions, Cost tracking, Tool and agent trajectory monitoring.
LangSmith is primarily designed for both businesses and individuals. AI Observability Platform
Popular alternatives to LangSmith include Google AI Studio, Cohere, Replicate. Compare their features on Decod.tech to find the best fit.
LangSmith remains relevant in 2026. LangSmith is a comprehensive AI agent and LLM observability platform with tracing and real-time monitoring. It helps developers debug agents, find fai The pricing model is freemium. Check reviews and comparisons on Decod.tech to decide.
LangSmith offers a freemium plan. You can start for free and upgrade as your needs grow. Visit the official pricing page for details.