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LangChain

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LangChain is a complete toolkit for engineers to build, test, and launch reliable AI agents. It offers clear visibility into agent actions, helps improve quality through evaluations, and provides robust deployment infrastructure. You can easily switch AI models or tools, keeping your applications flexible.

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OverviewFeaturesUse CasesFAQPricing

About LangChain

Who It's For

This tool is for engineers and developers who build, test, and deploy reliable AI agents and applications. It supports teams, from startups to large companies, in creating advanced AI systems.

What You Get

You receive clear visibility into your AI agent's actions, making it easy to spot and fix problems. The platform lets you quickly build, test, and improve your agents. It also provides strong infrastructure to deploy agents that run for extended periods. You can swap AI models and tools easily without rewriting your application.

How It Works

It uses frameworks like LangChain for fast agent building with pre-built parts, or LangGraph for custom, flexible workflows. LangSmith then lets you trace agent steps, test quality with evaluations, and deploy securely with built-in memory and scaling features.

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Features & Capabilities

⚙️ Core Agent Development

Pre-built Agent Architecture

Accelerates development by providing pre-built agent architectures and model integrations.

Custom Agent Workflows

Offers low-level primitives to build and control custom agent operational flows.

Model Agnostic

Enables swapping out various AI models, tools, and databases without code changes, preventing vendor lock-in.

Rapid Iteration Workflows

Supports fast cycles of building, testing, deploying, and learning across the entire agent engineering lifecycle.

🔍 Agent Observability & Quality

Tracing & Visibility

Provides clear step-by-step visibility into agent execution for efficient debugging and understanding agent behavior.

Agent Evaluation & Improvement

Enhances agent quality by enabling creation of realistic test sets, performance scoring, and expert feedback integration.

Framework-Agnostic Tracing

Allows tracing agent interactions using SDKs regardless of whether LangChain's frameworks are used or not.

🚀 Scalable Agent Deployment

Durable Performance Infrastructure

Offers agent infrastructure designed for shipping at scale, accommodating long-running workloads and human oversight.

Managed Agent Deployment

Provides one-click deployment with APIs that manage memory, auto-scaling, and enterprise-grade security out of the box.

Support for Long-Running Workloads

Built to handle complex agent workflows that can operate continuously for hours or days with robust support.

Use Cases

Streamlining AI Agent Development and Debugging

Engineering teams struggle with the complexity of building, debugging, and ensuring the quality of AI agents due to their non-deterministic nature and dense outputs. LangChain provides the foundational frameworks for rapid agent development, while LangSmith offers deep observability through tracing to understand agent behavior and robust evaluation tools to build test sets and iterate on agent performance.

AI/Tech, B2B SaaSFor: AI Engineers, ML Engineers, Software Developers

Deploying Enterprise-Grade AI Agents at Scale

Traditional infrastructure often fails to support the unique demands of long-running AI agent workloads that require continuous human oversight and scalable memory management. LangSmith addresses this by offering purpose-built deployment infrastructure with one-click APIs, enabling auto-scaling, robust memory handling, and enterprise-grade security, ensuring reliable operation for complex, multi-day agent workflows.

Enterprise SaaS, Financial Services, Customer ServiceFor: DevOps Engineers, MLOps Engineers, AI Architects

Enhancing Accuracy in AI-Powered Q&A and Content Moderation

Businesses require sophisticated AI solutions for accurate information retrieval and content safety, but LLMs alone can be prone to inaccuracies or lack domain context. LangChain enables the development of powerful Retrieval Augmented Generation (RAG) systems for precise question answering, and facilitates automated content moderation agents that interact with external tools and maintain conversational context for improved efficacy.

Customer Service, E-commerce, Media & PublishingFor: Product Developers, Content Strategists, Support Team Leads

Crafting Interactive and Context-Retaining Conversational AI

Creating truly engaging conversational AI requires the ability to remember past interactions and dynamically leverage external information or actions. LangChain simplifies this by offering robust memory components to maintain conversation context and an agent framework that empowers AI to interact with external tools and APIs, facilitating dynamic responses and complex workflows for richer user experiences.

Customer Service, Marketing, HealthcareFor: AI Developers, Chatbot Developers, Product Managers

Frequently asked questions

Tags

workflow automationagent developmentllm orchestrationtool integrationagent architecture

Specifications

Deployment
Browser
API
Cloud
Target Audience
Startup
Business
Enterprise
Complexity
Expert

Pricing

Developer

Per monthly

Free
  • Maximum of 1 seat
  • 5k base traces / mo included
  • Tracing
  • Monitoring
  • Insights (beta)
  • Online and offline evals
  • Dataset collection
  • Annotation queue (human feedback)
  • Prompt Hub and Playground
  • Bulk data export
  • Cloud Hosting
  • Google, GitHub SSO
  • Organization Roles (User and Admin)
  • Community Slack Support

Plus

Per monthly

$39
  • Up to 10 seats
  • 10k base traces / mo included
  • Includes LangSmith Observability & Evaluation suite
  • 1 free Dev deployment (unlimited node executions)
  • Additional deployments: $0.001/node execution
  • Additional deployments: $0.0007/min Dev deployment uptime
  • Additional deployments: $0.0036/min Prod deployment uptime
  • LangSmith Deployment: Expose agent as MCP server
  • LangSmith Deployment: Real-time streaming of intermediary steps and final output
  • LangSmith Deployment: Agent Authorization (beta)
  • LangSmith Deployment: 1-Click Deploy
  • Fully managed by LangChain infrastructure
  • LangChain's Cloud (US or EU) data location
  • Custom SSO
  • Email Support

Enterprise

Per annually

Free
  • Custom users
  • Custom base traces / mo included
  • Includes LangSmith Observability & Evaluation suite
  • Custom Node execution cost
  • Custom Uptime cost
  • LangSmith Deployment: Horizontally-scalable service for production-sized deployments
  • LangSmith Deployment: 30+API endpoints including state and memory
  • LangSmith Deployment: Cron scheduling
  • LangSmith Deployment: Authentication & Authorization for LangGraph APIs
  • Hosting options: Cloud, Hybrid, or Self-Hosted
  • Infra: Cloud (Fully managed), Hybrid (SaaS control plane, Self-hosted data plane), Self-Hosted (Fully self-managed)
  • Data location: Cloud (LangChain's Cloud US or EU), Hybrid (LangChain's Cloud US or EU), Self-Hosted (Your VPC)
  • Advanced Role-Based Access Control
  • Team trainings
  • Architectural guidance for your applications
  • Access to deployed engineers
  • SLA
  • Custom Terms
  • Infosec Review

✓ Free plan • ✓ Plans from $39 / monthly • ✓ Enterprise options

Links

Website

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