LangChain
Ship agents that work with LangSmith, the agent engineering platform for observing, evaluating, and deploying AI agents.
Overview
Use cases
- AI agent development and deployment
- Debugging agent execution with tracing
- Evaluating and monitoring AI applications
- Prompt engineering and optimization
- Human feedback annotation
Key features
- Agent tracing and debugging
- Online and offline evaluations
- Prompt Hub, Playground, and Canvas
- Annotation queues for human feedback
- Monitoring and alerting
- Fleet agent management
- Agent deployment capabilities
- Custom hosting options (Enterprise)
Pricing
| Tier | Price | Includes |
|---|---|---|
| Developer | Free | Up to 5k traces/mo, tracing, evals, Prompt Hub, 1 Fleet agent, 50 Fleet runs/mo, 1 seat |
| Plus | $39/seat/mo | Up to 10k traces/mo, 1 dev deployment included, unlimited Fleet agents, 500 Fleet runs/mo, unlimited seats, up to 3 workspaces |
| Enterprise | Custom | Alternative hosting (hybrid/self-hosted), custom SSO/RBAC, dedicated engineering support, SLA, team training, custom limits |
Free plan or trial: Free Developer plan with up to 5k base traces/month, 1 Fleet agent, up to 50 Fleet runs/month
Integrations
No public integration list available. Check the vendor’s site.
Best for
AI developers, ML engineers, and teams building AI agents from startups to enterprises
Company size fit: Startup (1-10), SMB (11-50), Mid-Market (51-500)
Alternatives
Category
Primary: Automate & build → AI agents & GTM automation
Tier 1 Basic · Last reviewed 2026-04-22